Answer:
x + 7
___________________________________________________
What are variables?
A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common symbols used for variables!
How do we describe variables in word form?
When we describe an expression in words that includes a variable, we're describing an algebraic expression (an expression with a variable).
In this case "The sum of a number" has no definite correlation to a number, therefore, it is automatically considered a variable.
Then, since it says "The sum" we know we are adding. Adding what? We are adding an unknown term to the number 7.
Henceforth, the answer is x + 7.
___________________________________________________
Learn more:
https://brainly.com/question/13532140
(7a+10)/(3b+6)°
72
what is the values of a and b
After evaluation we get the values as a = 8 + -0.4285714286b
Given, the expression is (7a ₊ 10)/(3b ₊ 6) = 72
Simplifying
(7a ₊ 10) ₊ (3b ₊ 6) = 72
Reorder the terms:
(10 ₊ 7a) ₊ (3b ₊ 6) = 72
Remove parenthesis around (10 ₊ 7a)
10 ₊ 7a ₊ (3b ₊ 6) = 72
Reorder the terms:
10 + 7a + (6 + 3b) = 72
Remove parenthesis around (6 + 3b)
10 + 7a + 6 + 3b = 72
Reorder the terms:
10 + 6 + 7a + 3b = 72
Combine like terms: 10 + 6 = 16
16 + 7a + 3b = 72
Solving
16 + 7a + 3b = 72
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '-16' to each side of the equation.
16 + 7a + -16 + 3b = 72 + -16
Reorder the terms:
16 + -16 + 7a + 3b = 72 + -16
Combine like terms: 16 + -16 = 0
0 + 7a + 3b = 72 + -16
7a + 3b = 72 + -16
Combine like terms: 72 + -16 = 56
7a + 3b = 56
Add '-3b' to each side of the equation.
7a + 3b + -3b = 56 + -3b
Combine like terms: 3b + -3b = 0
7a + 0 = 56 + -3b
7a = 56 + -3b
Divide each side by '7'.
a = 8 + -0.4285714286b
Simplifying
a = 8 + -0.4285714286b
hence we get the solution of the equation.
Learn more about solving equations here:
brainly.com/question/22688504
#SPJ9
please help with this
Using integrals, we have that:
a) The mean is of 1205 and the standard deviation is of 2.87.
b) P(1200 < X < 1202) = 0.2.
What is the probability distribution?The distribution is given by:
f(x) = 0.1, 1200 < x < 1210.
The integral of this function will be used to find the probabilities.
The mean of the distribution is given by:
[tex]\mu = \int_{1200}^{1210} xf(x) dx[/tex]
Hence:
[tex]\mu = \int_{1200}^{1210} 0.1x dx [/tex]
[tex]\mu = 0.05x^2|_{x = 1200}^{x = 1210}[/tex]
Hence the mean is:
0.05(1210² - 1200²) = 1205.
The variance of the distribution is given by:
[tex]\sigma^2 = \int_{1200}^{1210} (x - \mu)^2 f(x) dx[/tex]
Hence:
[tex]\sigma^2 = \int_{1200}^{1210} 0.1(x - 1205)^2 dx[/tex]
[tex]\sigma^2 = 0.033(x - 1205)^3|_{x = 1200}^{x = 1210}[/tex]
[tex]\sigma^2 = 0.033(1210 - 1205)^3 - 0.033(1200 - 1205)^3[/tex]
[tex]\sigma^2 = 8.25[/tex]
The standard deviation is the square root of the variance, hence:
[tex]\sigma = \sqrt{8.25} = 2.87[/tex]
For item b, the probability is given by:
[tex]P(1196 < X < 1202) = \int_{1200}^{1202} 0.1 dx[/tex]
P(1196 < X < 1202) = 0.1x, from x = 1200 to x = 1202.
Applying the Fundamental Theorem of Calculus:
0.1(1202) - 0.1(1200) = 0.2.
The lower bound is of 1200 because the distribution is not defined for values less than 1200.
Hence:
P(1200 < X < 1202) = 0.2.
More can be learned about integrals and probabilities at https://brainly.com/question/15109629
#SPJ1
Solve the formula for the variable h v=lwh
Answer:
[tex] \sf \: h = \frac{v}{lw} [/tex]
Step-by-step explanation:
Let's solve for h.
v=lwh
Step 1: Flip the equation.
hlw=v
Step 2: Divide both sides by lw.
hlw/lw = v/lw
h=v/lw
Gary's is a small publishing company that publishes math books.
the production costs include a one time cost for editing which is $1050 for the book the company is currently working on. once the book is in production, the only cost will be the variable cost, of printing which is $15 per book. the company will market the book at a price of $35.
if you were to plot a graph of the profit generated by the book, what would the slope and y intercept represent?
The slope of the graph is 20 and the y-intercept is -1050.
The slope of a linear graph is defined as the gradient of the graph .It is also defined by trigonometric properties as the tangent of the angle formed by the line with the positive y-axis.
The y-intercept is the point of intersection of the graph and the y-axis.
The general equation of a straight line in the cartesian plane is given by
y = m x + c where 'm' represents the slope and 'c' represents the y-intercept.
It is given that the one time editing cost is 1050 dollars.
Variable cost of printing each book = 15 dollars
Each book is sold at = 35 dollars
∴profit per book sold = 35 - 15 = 20 dollars
Let Gary sells x number of books . Profit from selling x books = 20 x
Let us consider the net profit of Gary after selling x books be represented by y.
∴ y = profit from x books - establishment cost
or, y = 20 x -1050
Now comparing the above equation with the general equation of a straight line( y = mx + c ) we can infer that:
slope(m) = 20
y-intercept (c) = -1050
Therefore the slope of the graph is 20 and the y-intercept is -1050.
To learn more about slope visit:
https://brainly.com/question/14511992
#SPJ9
3 1/5 ÷ 3 4/5 answer plsss
Answer: oh ofc! here is the answer it is 0.84210526315
but im not 100% sure it is the right answer
Step-by-step explanation: i really hope this helps have a good day/night (: <3
a statement with the word per is always a unit rate
Yes, a statement with the word 'per' is always a unit rate;
When comparing two different kinds of numbers with distinct units, a rate is a ratio that is employed. The unit rate, on the other hand, shows how many units of one quantity are equal to one unit of another. When the rate's denominator is 1, we refer to the rate as a unit rate. In actuality, the amount included in each unit or per unit is referred to as the unit rate. Let's use some instances to help us grasp this:
Unit rate is 20 miles per hour, or 40 miles in two hours.
To learn more about unit rate; visit: https://brainly.com/question/11258929
#SPJ9
Pls help me with thisss
Answer:
A
Step-by-step explanation:
Each hash mark between "School" and "Declan's house" is one-eighth of a mile. Starting at "School" count 5 hash marks to the left to get where Harper lives.
Which expression is the simplest form of 3x³ – x² + 2 (x³ − 4x²)?
Answer: [tex]x^{2} (5x-9)[/tex]
Step-by-step explanation:
[tex]3x^3 - x^2 + 2(x^3 - 4x^2)[/tex]
[tex]= 3x^3 - x^2 +2x^3 - 8x^2[/tex]
[tex]=5x^3 -9x^2[/tex]
[tex]=x^2 (5x-9)[/tex]
Can you please help me
Which is the following in an irrational number?
A. -8.264264264...
B. -5/9
C. 17.47
D. 4.28192489...
*
Answer:
D
Step-by-step explanation:
Irrational numbers are those which cannot be expressed by the ratio of two integers.
A is rational because it is a recurring decimal. Recurring decimals can be represented by the ratio of two integers (this one can be represented by the fraction -2752/333, which is a ratio of two integers).
B is a fraction with two integers, therefore it is rational. -5/9 is a ratio of two integers.
C can be represented by 1747/100.
D is an infinite decimal but isn't recurring like A, meaning it cannot be represented by the ratio of two integers, and is therefore it is irrational, unless you are shown further digits of the decimal which prove it to be recurring, which is not the case here.
What is the range of the function on the graph?
all the real numbers
all the real numbers greater than or equal to 0
all the real numbers greater than or equal to 2
all the real numbers greater than or equal to -3
The range of the function on the graph containing all the real numbers greater than or equal to –3 . So the correct option is (d)
What is the range of a function?The collection of all a function's outputs constitutes its range.
The elements of the co-domain that are mapped are known as the images, while the elements of the domain are known as pre-images.
The set of all images of the domain's elements in this case serves as the function's range, as does the set of all of its outputs.
We have to find the function on the graph.
From the given graph, we can see from the graph that the function's maximum y value is -3 and that the graph keeps going up.
Therefore, the range includes all real values that are greater than or equal to -3.
To know more about the domain and range of a function, visit:
https://brainly.com/question/21027387
#SPJ9
What value of x makes this proportion true?
25/20 = x/4
A. 6
B. 9
C. 20
D. 5
Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m?
select all that apply
m - 4 = -7m - 8
-8 - 3m = 4 - m
-3m - 8 = 4 - m
-15m = -4m
-7m - 8 = m - 4
-8 - 7m = -4 + m
The equations that are equivalent to the given equation are m - 4 = -7m - 8, -7m - 8 = m - 4 and -8 - 7m = m - 4
How to determine the equations that are equivalent to the given equation?The equation is given as
-2m - 5m - 8 = 3 + (-7) + m
Remove the bracket
So, we have
-2m - 5m - 8 = 3 - 7 + m
Evaluate the like terms
So, we have
-7m - 8 = - 4 + m
The above expression can be written as follows
m - 4 = -7m - 8
-7m - 8 = m - 4
-8 - 7m = m - 4
Hence, the equations that are equivalent to the given equation are m - 4 = -7m - 8, -7m - 8 = m - 4 and -8 - 7m = m - 4
Read more about equivalent equations at
https://brainly.com/question/2972832
#SPJ1
need help with solving this triangle
Answer:90
Step-by-step explanation:
you add 30 + 60 gives you 90 degrees
add it
3+8+6+3+3+3+6
The answer to it would be 32.
Answer:
32
32 is the answer hope this helps
The common difference for the geometric sequence given by 1, -1, -3, -5, -7… is 2.
Answer:
No, the difference is -2.
Step-by-step explanation:
As the sequence progresses, the numbers get smaller(1, -1, -3, ...), and they get smaller by 2. Hence, the change in every number in the sequence as it progresses is -2.
Please stop with the trolls
Answer:
6
scale factor b to A = 4
Step-by-step explanation:
scale factor
We multiply the scale factor times the original figure length to get the new figure length
x * scale factor = 1.5
The scale factor is 1/4
x * 1/4 = 1.5
Multiply each side by 4 to get rid of the fraction
x * 1/4 *4 = 1.5 * 4
x = 6
The scale factor from figure B to figure A
1.5 * scale factor = 6
scale factor = 6/ 1.5
scale factor = 4
For which value of x is line n parallel to line m?
(Click document to see image.)
Answer: 70
Step-by-step explanation:
Looking at line p, we can form an equation to find the missing angle that would make the line equal to 180* (all straight lines, unless stated otherwise, should be assumed they are a 180* angle). We can use the equation below:
[tex]180 = 80 + 30 + x\\x = 180 - (80 + 30)\\x= 70[/tex]
If lines n and m are parallel, the angles should be equal when looking at an intersecting line.
Hope this helps!
Is x = -14 a solution to 9x - 7 = -7?
Answer:
since x=-14
9(-14)-7
-126-7=-133.
Frind the sale price if 15% discount is allowed off market price of 25.00. fly
step-by-step prime 36
Answer:
Step-by-step explanation:
36
6*6
3*2*6
3*2*3*2
PLEASE HELP QUICK WILL GIVE BRAINLIST !!!
How many times larger is 9 x 10^5 than 5 x 10^3?
1.8
18
180
1,800
Answer:
180.
Step-by-step explanation:
9/5 = 1.8 and 10^5/10^3 = 10^2
so tis 1.8 x 10^2 which is 180
pls give branliest
Answer: 180
Step-by-step explanation:
(9 x 10^5) / (5 x 10^3)=
(9 x 10^(2+3)) / (5 x 10^3)=
(9 x 10^2 x 10^3) / (5 x 10^3)=
(9 x 10^2)/5= ==> Divide each side by 10^3
900/5=180
A textile artist is asked
to make a wall-hanging that measures at most
3.75 feet wide by 6.5 feet tall. When finished,
the wall hanging measures 3 3/8 feet wide by
6 3/4 feet tall. Does the wall hanging meet the
specifications?
He wouldn’t be able to meet the specifications as the heigh is greater than the maximum height.
In mathematics, the greater than sign is a basic mathematical notation used to represent an inequality between two values. The symbol used to denote greater inequality is “>”. It is the commonly accepted mathematical notation of two strokes of equal length that meet at an acute right angle. A typical use of the greater than sign is to compare two values, where the first is greater than the second, or one is greater than the other. The greater than sign is an approximation of a closing square bracket.Maximum width of the wall hanging can be 3.75 feet and maximum height can be 6.5 feet.
After completing the work it was found that the width measures 3 3/5 feet and height was 3 3/4 tall.
If the height and width after completing the work is less than or equal to the maximum height and width then he will be able to meet the specifications .
Width
3 3/4
= (12+3)/4
= 15/4
= 3.75
Height
6 3/4
= (24+3)/4
= 27/4
= 6.75
He wouldn’t be able to meet the specifications as the heigh is greater than the maximum height .
Learn more about greator sign here
https://brainly.in/question/322139
#SPJ9
If the difference of a number and eight is tripled, the result is six more than the number. Find the number. Round your answer to the nearest integer, if necessary.
If the difference of a number and eight is tripled and the result is six more than the number, the number is 15
How to find the number using variable?The difference of a number and eight is tripled, then the result is six more than the number.
Therefore, the number will be represented by a variable
let the number = x
Hence,
3(x - 8) = x + 6
Therefore, let's open the bracket
3(x - 8) = x + 6
3x - 24 = x + 6
subtract x from both sides of the equation
3x - 24 = x + 6
3x - x - 24 = x - x + 6
2x - 24 = 6
add 24 to both sides of the equation
2x - 24 + 24 = 6 + 24
2x = 30
divide both sides by 2
x = 30 / 2
x = 15
Therefore, If the difference of a number and eight is tripled and the result is six more than the number, the number is 15
learn more on variable here: https://brainly.com/question/636881
#SPJ1
K
Larry Mitchell invested part of his $19,000 advance at 3% annual simple interest and the rest at 2% annual simple interest. If his total yearly interest from both accounts was $560, find the amount invested at each rate.
Larry Mitchell invested $7600 at 3% rate of interest and $11400 at 2% rate of interest.
In the field of finance, interest is the payment of a sum over and above the principal amount owed by a lender or depositor to a borrower or deposit-taking financial institution at a set rate.
Rate of an interest in defined as the amount that a lender charges a borrower in interest as a percentage of the principal.
Larry invested part of his $19000 at 3% and the rest at 2%
Let he invested $'x' at 3% interest .
Therefore amount invested at 2%=$(19000-x)
Interest earned annually at 3% on $x = [tex]\frac{3}{100} \times x =0.03x[/tex] .
Interest earned annually at 2% on $(19000-x)=[tex]\frac{2}{100} \times(19000-x)[/tex]
=[tex]380-0.02x[/tex]
Now the combined interest for both the investment is $560 .
Therefore we can form a linear equation to solve for x:
0.03x+380-0.02x=560
or, 0.01x=180
or, x=18000
Therefore Larry invested $18000 at 3% interest.
Money invested at 2%=$(19000-18000)=$1000
Hence Larry invested $18000 at 3% rate of interest and $1000 at 2% rate of interest.
To learn more about rate of interest visit:
https://brainly.com/question/14445709
#SPJ9
Jack is building a wall.
He uses 300 bricks to build part of the wall.
This part of the wall is 5 metres long and 1.5 metres high.
The complete wall will be 8 metres long and 1.5 metres high.
How many more bricks does Jack need to complete the wall?
The amount of bricks that Jack would need to complete the wall is 180.
How many more bricks does he need?The first step is to determine the total amount of bricks he would need to build the wall. In order to determine this value, ratio analysis would be used.
Total bricks needed = (area of wall x number of blocks already used) / (area of wall already built)
Area of wall = 8 x 1.5 = 12
Area of wall already built = 5 x 1.5 = 7.5
Total bricks needed = (12 x 300) / 7.5 = 400 bricks
Number of bricks needed to complete the wall = 400 - 300 = 180 bricks
To learn more about ratios, please check: https://brainly.com/question/9194979
#SPJ1
-7(5x-70=-19-x i neeeeeeeeeeeeeeeeeeeeeeddddddd helppp
Answer:
hope this will help you
Step-by-step explanation:
-7(5x-70)=-19-x
-35x+490=-19-x
490+19=-x+35x
509=34x
x=509/34
x=14.97
10x-6-10x-2 simplified please show steps
Answer:
Step-by-step explanation:
1) group any number with an X together and rewrite answer (if there is a negative in front of a number always carry it with it when rearranging.)
10x-10x-6-2
2) lets solve the numbers with Xs together
10x+10x= 20x
3) now lets solve whole numbers
-6-2=-8
4) bring down the 20x and the -8/ rewrite problem with your solved numbers
20x-8
5) we have to have X alone so in order to get rid of the 20 in front of the X you must divide 20 by 20x,
20x/20 ( it cancel's out and now you're left with X)
X=-8
6) but whatever you do to one side of the equal sign you have to do to the other side so now you must divide -8/20 which will leave you with
Answer: X=-0.4 or -2/5
The variables and y vary inversely. Use the given values to write an equation relating and y. Then find y when x = 3.
x = 5, y = -4
An equation is y =
When x = 3, y =
Answer:
x=5$
$y=-4
Step-by-step explanation:
the solution is easy no more you have to put the first numbers and put it in order
Why is 908-394 equals 514
Answer:
908 - 394 = 514
Step-by-step explanation:
It's 514 because you took out the 394 from 908. That's why you got 514.
You subtracted the number 394 from 908.
That's why you got 514.
I hope you get it.