Answer:
Step-by-step explanation:
Show that if 3x – 7 = 5, then x = 4.
Here, our given statement is 3x – 7 = 5, and we're asked to prove x = 4.
x=4
Statements Reasons
1. 3x – 7 = 5 Given
2. 3x – 7 + 7 = 5 + 7 Addition of 7 to equation (1)
3. 3x + 0 = 5 + 7 Substitution of –7 + 7 = 0 into (2)
4. 3x = 5 + 7 Substitution of 3x + 0 = 3x into (3)
5. 3x = 12 Substitution of 5 + 7 = 12 into (4)
6. 3x⁄3 = 12⁄3 Dividing equation (5) by 3
7. x = 12⁄3 Substitution of 3x⁄3 = x into (6)
8. x = 4 Substitution of 12⁄3 = 4 into (7)
Is there such a thing as being too descriptive? Yep, and that was it, since over half the proof was devoted to telling the reader how to do arithmetic. We'll typically take numerical computation for granted, and write proofs like this:
What are the terms in the expression 2d + 7 + 5f?
2, 7, and 5
d and f
2 and 5
2d, 7, and 5f
Answer: 2d, 7, and 5f
Step-by-step explanation: i took the math quiz, decided to help
Katie works at a local fast food restaurant. She has $1200 in the bank. She just bought a car. It's value is $10,000, but she has a loan from the bank for $9100. She also has a horse that has a value of $1500, and tack and supplies for the horse worth $850. What is Katie's net worth?
Answer:
33450
Step-by-step explanation:
what is x/y+z=w to make x the subject of the formula
We can make x the subject of the equation by moving all the other terms to the opposite side of the equal sign while x is on the next.
x/y+z=w [multiply both sides by y+z]
x = w (y + z)
Find the missing angle measures.
What is m∠1?
a. 50
b. 105
c. 100
d. 60
Answer: C
Step-by-step explanation:
we know that the third angle of the triangle with 50 and 50 degrees is 80 because a triangle has 180 degrees. we also know that 80 + the measure of angle 1 = 180 and 80 + 100=180
Johnny went out to dinner with his two friends. Johnnys meałeast $12.32, Marks
meal cost $11.23, and Annas meal cost $7.89. After a tax of 8% and chipsi 5%,
What is the total amount of the bill?
Answer:
$35.53
Step-by-step explanation:
12.32+11.23+7.89=31.44
31.44*0.08(for the 8% tax)=2.52
31.44*0.05=1.57
31.44+2.52+1.57=35.53
M is the midpoint of PQ. MQ=5x+8 and PQ = 6x+56, find PM
Answer:
PM = 58
Step-by-step explanation:
The question tells us that the full line has a value of 6x+56. The midpoint divides this line into equal pieces. We are also given the value of half (MQ) of the line (5x+8). By subtracting 5x+8 from 6x+56, we can figure out the value of the other half of the line (PM).
This gives us the expression for PM: x+48
Now, since these are both the two parts of the midpoint, by definition, we know they're equal.
You equal both equations and get x=10
You plug in 10 as x in the expression we got for PM (10+48), which gives us the value 58.
Help plsssssssssssssss
The sum of 6 times a number 3 and 9
is .
Step-by-step explanation:
28 is the answer because you multiply 6×3 and it is equal to 18 and add 8 is equal to 28
solve the fallowing system of equations for x
x+2y=4
x-2y=12
Step-by-step explanation:
x+2y=4
x-2y=12
______ ( add both equation)
2x = 16
x= 16/2
x= 8
Hope it helps ya
Simplify your perimeter expression as much as possible.
C.
x2
JR
Оа
b
4y + 4x + 4
2x + 4y + 2
2
C с
Answer:
1019191991
Step-by-step explanation:
08899988777777777
Stacy started a baking account with $150 and is spending $7 per day on lunch. This situation models which type of function?
Answer:
Linear function
Step-by-step explanation: For each day, you spend $7. This situation models a linear function.
In -10x + y - 5; -10x and y are what?
Answer:
The answer is -20x+1y-5
Step-by-step explanation:
What is the length of time
passed from 3:45 p.m. to 10 p.m.?
Answer:
your answer is the length of time is 7 hours and 15 minutes
Step-by-step explanation:
hope it helps
fill in the missing number-
2 + ? = -5
Answer:
the answer is -7
please mark this as brainliest
[tex]▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \huge \mathfrak{solution}}▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ [/tex]
let the missing number be x,
[tex]2 + x = - 5[/tex][tex]x = - 5 - 2[/tex][tex]x = - 7[/tex]hence, the missing number is -7
PLEASE SOMEOME HELP ME MY HW IS DUE TMR ITS 8TH GRADE ALGEBRA 1 LINEAR FUNCTIONS
I only did the top part please I beg you help me
Answer:
I put 4, 5, & 6 in order in the photos.
7-8-9 are all linear functions which are written in the y=ax+b format, the ones I put in bold are the equations and I listed the values just in case I'm not sure how your teacher makes you write them.
7.
-0.6=a(-3)+b
0.2=a(1)+b
1.4=a(7)+b
a=0.2,b=0
y=0.2x
8.
-10=a(-5)+b
-1=a(-2)+b
17=a(4)+b
b=5, a=3
y=3x+5
9.
8=a(-5)+b
2=a(-2)+b
-18=a(8)+b
b=-2, a=-2
y=-2x-2
10.
The domain and range is negative infinity to infinity.
11.
For a basic subscription, a cable television provider charges an activation fee of $60, plus $125 per month. What linear function represents the total cost of basic cable subscription for t months? What is the total cost for two years of service?
y=125x+60
$310 for 2 months
$3060 for 2 years
Step-by-step explanation: let x be the number of months
y=125x+60
y=125(2)+60
y=310 dollars for two months
y=125(24)+60
y=3060 dollars for two years
I hope it helps!
i attached my questions thx
Answer:
Answer:
1. x15 (a)
2. 1/x15 (b)
Step-by-step explanation:
multiply exponents
simplify expression
Step-by-step explanation:
answer po pls pls plsss
Answer:
28
Step-by-step explanation:
- 14 x - 2 = 28
28 is the answer.
Answer:
28 cause -14 * -2 = 28
Step-by-step explanation:
I don't mean 2 sound rude but try to do this simple stuff on your own it will help u in the future
PLZZZZZZZZZ HELPPPPPPPPPPPPP
Steven says 5 x 1022, carbon atoms are in 1 gram of carbon. How many carbon atoms
are in 3 grams of carbon?
In 1 gram if carbon there is 5 × 10²² carbon atoms,
so, in 3 grams of carbon the number of carbon atom is equal to :
[tex]3 \times 5 \times 10 {}^{22} [/tex][tex]15 \times 10 {}^{22} [/tex][tex]1.5 \times 10 {}^{23} \: \: carbon \: \: atoms[/tex]What is the factored form of this expression?
-9x3 - 12x2 -4x
OA. —x(3x + 2)2
O B. –x(3x − 2)(3x + 2)
OC. x(3x- 2)(3x+ 2)
OD. x(3x-2)2
Answer: A
Step-by-step explanation:
Rosa says she can break this array into 3 different sets of two smaller arrays . Is Rosa correct ? Explain . The array is a 6 by 8.
Answer:
yes
Step-by-step explanation:
because 6X8=48 and 48 dived by 3 equals 16
Arrays are dataset that are represented in rows and columns. Rosa's claim is correct.
What is an array?An array is a linear data structure that collects elements of the same data type and stores them in contiguous and adjacent memory locations.
From the question, we have:
6 rows and 8 columns
The number (n) of elements in the array is: n = Rows × Columns.
So, we have: n = 6 × 8 =48
Express as sum of three numbers, that is n=12+16+20
Express each term as a product, that is n=2 × 6 + 4 × 4 + 4 × 5
The above expression means that, the array can be split to:
An array of 2 by 6
An array of 4 by 4
An array of 5 by 4
Hence, Rosa is correct.
Read more about arrays at:
brainly.com/question/25182099
#SPJ5
Question 5 of 10
Pardis bought opening night tickets to a movie she had been excited about
seeing for a long time. Midway through the movie, she realizes it's bad and
wishes she had stayed home. Which question should Pardis have asked
herself before spending the money on the ticket?
A. Am I overspending?
B. Am I buying for the right reason?
Ο Ο Ο Ο
c. Am I purchasing on a whim?
D. Are my expectations too high?
SUBMIT
Answer: d bc I can't tell what is supposed to say.
given that f= x^3/4 +6. find f(4)
Answer:
here
f= x^3/4 +6
to find f(4)
Step-by-step explanation:
f(4)= 4^3/4+6
=64/10
= 6.4
p(-2)=-3+4x help help
and y =
4
4
Which is the solution of the equation (4y - 3)2 = 12?
3+2v3
3-23
a. y =
3+2V2
b. y =
and y =
-3-2V2
4
63
-63
y=-
and y =
4
4
3v2
-3/
and y =
4
C.
d. y =
4
4
Answer
10
Step-by-step explanation:
Which situation results in a final value of zero?
the overall change in temperature when the temperature goes from -10°F to 10°F
the total profit made when a person buys an item for $3 and then sells the item for $3
the overall change in altitude of a hot air balloon after rising 21 kilometers from sea level
the total distance a person travels when he bikes 5 miles to school and then bikes 5 miles back home
A group of 7 students was asked,
"How many hours did you watch
television last week?" Here are
their desponses.
7, 10, 5, 6, 19, 8, 17
Find the mean number of hours for
these students.
If necessary, round your answer to
the nearest tenth.
Lenovo
Answer:
10.3 hours
Step-by-step explanation:
(7+10+5+6+19+8+17)/7
= 72/7
= 10.3
Mr. Chu's cherry tree grew 12 inches in
3
4
of a year. At that rate, how much would it grow in 1 year?
Answer:
16 inches after one year
Step-by-step explanation:
in 3/4 a year tree grew 12 inches
divide by 3
multiply by 4
16 inches
After watching Donald Duck in Mathmagic Land, please type out three things that you learned from the video. Did you like the video? Why or why not? Please answer all parts to the question
Answer:
Hope this helps
Step-by-step explanation:
Mathmagic Land had taught me more about math that I never knew before. I learned that everything can be involved with math. It all starts at the Pythagoreans which were the Greek. An example of how math is used today, is by playing billiards.
In billiards, you have to have a good technique of how your going to hit the ball, (good angles,) and you have to have a precise calculation of the angle your going to hit it at.I also learned when you cut shapes like a sphere, it just makes more and more shapes.
This is what I learned watching the Mathmagic Land Video.
Yes, Donald Duck in Mathmagic Land taught me alot of things I did not know before.
is y= 4x(8 -x) a linear or a nonlinear function?
Answer:
nonlinear
Step-by-step explanation: