help 8 th grade math
Answer:
6 is A
Step-by-step explanation:
-5 x -4 = 20
-5 x 7x = -35x
I am between 18 x 20 and 780 ÷ 2. I am a multiple of 9, and I am even. Who am I?
Answer:
378
Step-by-step explanation:
18 times 20 is 360
780 divided by 2 is 390
9 times 40 is 360 needs to be over 360
9 times 41 is 369
9 times 42 is 378 only even number
9 times 43 is 387
9 times 44 is 396 needs to be under 390
find the x !
please hurry! Thank you!
Step-by-step explanation:
2x+98=180° (angles in straight line )
2x=180-98
x=2/2
x=1
Answer:
x = 41
Step-by-step explanation:
the 2 angles are adjacent and sum to 180° , that is
2x + 98 = 180 ( subtract 98 from both sides )
2x = 82 ( divide both sides by 2 )
x = 41
8. A cube container, with original volume 64 in. 3, is being redesigned to increase
its capacity. The expression x + 64 in. ? models the volume of the new cube.
If the volume can increase by a maximum of 100 in. 3, what is the maximum
measurement of the edge of the larger cube, rounded to the nearest tenth?
The volume of the cube container is the amount of space in it, and the maximum measurement of the edge of the larger cube is 5.5 inches
How to determine the maximum edge of the larger cube?The volume of the container is given as:
V = 64 cubic inches
When it increases by a maximum of 100 cubic inches, the new volume becomes
V = 164 cubic inches
The volume of a cube container is calculated using:
V = l³
Where l represents the edge length of the cube
Substitute 164 for V
l³ = 164
Take the cube root of both sides
l = 5.5
Hence, the maximum measurement of the edge of the larger cube is 5.5 inches
Read more about volumes at:
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Find the equation of the line.
Use exact numbers PLEASEEE
y = ___ x+ ___
Step-by-step explanation:
[tex]y = \frac{3}{4} x - 2[/tex]
is the required equation
I hope it helped you
Answer:
y = [tex]\frac{3}{4} x-2[/tex]
Step-by-step explanation:
y = mx + c
m = gradient= [tex]\frac{-5-(-2)}{-4-0}[/tex]= [tex]\frac{3}{4}[/tex]
c = y-intercept = -2
Express as single logarithm.
1/2 log (x) - 2 log (2y) + 3 log (z)
Answer:
[tex]\log\left(\dfrac{\sqrt{x}\:z^2}{4y^2}\right)[/tex]
Step-by-step explanation:
[tex]\dfrac12\log(x)-2\log(2y)+2\log(z)[/tex]
[tex]\textsf{Apply log power rule}: \quad n \log(x)=log(x)^n[/tex]
[tex]\implies \log(x)^{\frac12}-\log(2y)^2+\log(z)^2[/tex]
[tex]\textsf{Apply exponent rule}: \quad(ab)^c=a^cb^c[/tex]
[tex]\implies \log(\sqrt{x})-\log(4y^2)+\log(z^2)[/tex]
[tex]\textsf{Apply log quotient rule}: \quad \log(x)-\log(y)=log(\frac{x}{y})[/tex]
[tex]\implies \log\left(\dfrac{\sqrt{x}}{4y^2}\right)+\log(z^2)[/tex]
[tex]\textsf{Apply log product rule}: \quad \log(x)+\log(y)=log(xy)[/tex]
[tex]\implies \log\left(\dfrac{\sqrt{x}\:z^2}{4y^2}\right)[/tex]
area of regular polygons
help me pls (2x+3) (x+5)
Answer: C
Step-by-step explanation:
[tex]\left(2x+3\right)\left(x+5\right)[/tex]
[tex]\mathrm{Apply\:FOIL\:method}:\quad \left(a+b\right)\left(c+d\right)=ac+ad+bc+bd[/tex]
[tex]=2xx+2x\cdot \:5+3x+3\cdot \:5[/tex]
[tex]$$Simplify[/tex]
[tex]=2x^2+13x+15[/tex]
Here are the first four terms of a sequence: 3, 12, 48 and 192.
(a) Work out the common ratio for this sequence.
(b) Work out the nth term of this sequence.
Answer:
look below
Step-by-step explanation:
The common ratio is 1:4 because we are multiplying the previous number by 4
The nth term for this sequence is quite simple. To find the nth term, take the base, 3, and multiply by the nth 4th. This can be written as 3*4^n+1
I hope this helped!
It would be greatly appreciated if you marked this answer as brainliest!
Answer:
see explanation
Step-by-step explanation:
the sequence is geometric and has common ratio r
(a)
r = [tex]\frac{a_{2} }{a_{1} }[/tex] = [tex]\frac{12}{3}[/tex] = 4
(b)
the nth term of a geometric sequence is
[tex]a_{n}[/tex] = a₁ [tex]r^{n-1}[/tex]
where a₁ is the first term and r the common ratio
here a₁ = 3 and r = 4 , then
[tex]a_{n}[/tex] = 3 . [tex]4^{n-1}[/tex]
pleeeaaasseeee help (questions in photo) will mark brainliest
Answer:
a. 0.8727rad
b. 5.585rad
that should be correct, if not, i apologize T_T
Helppp plssssss!!!!!!
Answer:
47°
Step-by-step explanation:
All trianges have a angle total of 180°.
Assuming the triangles are equals:
72+61+x=180
x=47
Alexa was out at a restaurant for dinner when the bill came. Her dinner came to $14. After adding in a tip, before tax, she paid $17.78. Find the percent tip.
The amount of the tip was computed first, and it was then used to find then percentage of the tip that was given at the restaurant
Computation on PercentageGiven Data
Cost of dinner = $14Total Cost with tip = $17.78Let us find the amount of the tip
= 17.78 -14
= $3.78
Let us find the percentage tip
= 3.78/14 * 100
= 0.27 * 100
= %27
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An altitude is drawn from the vertex of an isosceles triangle, forming a right angle
and two congruent triangles. As a result, the altitude cuts the base into two equal
segments. The length of the altitude is 18 inches, and the length of the base is
17
inches. Find the triangle's perimeter. Round to the nearest tenth of an inch.
Answer:56.8 inches
Step-by-step explanation:
For perimeter we must find the lengths of the 2 diagonal sides of the triangle which are the same because it is isosceles.
the triangle is cut directly in half so both halves of the base are 17/2
17/2 = 8.5
solve through pythagoren theorum
altitude^2 + (half of base)^2 = (diagonal length)^2
18^2 + (8.5)^2 = (diagonal length)^2
324 + 72.25 = (diagonal length)^2
396.3 = (diagonal length)^2
[tex]\sqrt{396.3}[/tex] = diagonal length
diagonal length = 19.9
diagonal length + diagonal length + base = perimeter
19.9 + 19.9 + 17 = perimeter
56.8 inches = perimeter
olive oil is $7.98 for 36 ounces. What is its unit rate? Round your answer to the nearest cent
Answer:
22 cents
Step-by-step explanation:
Rounding the number $0.2217 to the nearest cent, we get $0.22.
A student is working on a project for which he records the revolutions per minute (rpm) for a small electric motor as he increases the voltage in a circuit. Here is the table showing the results:
Voltage
(volt) Motor Speed
(rpm)
0 0
1 25
2 50
3 75
4 100
Create a graph showing the relationship in the table. Think about the title, axis labels, and whether you need to connect the points with a line.
Answer:
See below ↓
Step-by-step explanation:
The relation is :
Let y = Motor Speed and x = Voltagey = 25xTitle : Variation of Motor Speed with Applied Voltage
x-axis label : Voltage (volt)
y-axis label : Motor speed (rpm)
As it constantly varies with a value of x and they are not isolated data points, they should be connected with a line.
A cylindrical specimen of cold-worked copper has a ductility (%el) of 25%. if its cold-worked radius is 10 mm, what was its radius (in mm) before deformation
The radius of the copper specimen before deformation was 8 mm of a cylindrical specimen of cold-worked copper has a ductility (%el) of 25%. if its cold-worked radius is 10 mm
Given information:
Ductility (%el) of cold-worked copper = 25%Cold-worked radius = 10 mmTo find the radius of the copper specimen before deformation, we'll use the formula for calculating the ductility:
Ductility (%el) = ((Final radius - Initial radius) / Initial radius) * 100
Let's denote the initial radius as "r" (in mm). The final radius is 10 mm (after cold-working).
25% = ((10 - r) / r) * 100
Now, solve for "r":
25% = (10 - r) / r
Convert percentage into fraction:
25/100 = (10 - r) / r
Convert fraction into decimal:
0.25 = 10 - r/r
on Cross-multiplication gives:
0.25r = 10 - r
Add r on both sides gives,
1.25r = 10
On dividing by 1.25 gives:
r = 8 mm
So, the radius of the copper specimen before deformation was 9.75 mm.
Learn more about radius here:
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#SPJ4
Two number cubes are rolled. What is the probability of rolling either a total greater than 9 or a multiple of 5?
A) 7/18
B) 13/36
C) 5/18
D) 2/9
the probability.
solution:P(5 or 10 or 11 or 12)
= P(5)+P(10)+P(11)+P(12)
= 4/36+3/36+2/36+1/36
= 10/36
= 5/18
so, the correct answer is option C) 5/18.
Iready - What is the coefficient in the following expression?
5а^2 – 7
The coefficient is 5.
Solution:The coefficient is defined as the number before a variable (a variable is a letter).In this case, the variable is a.The number before a is 5.Therefore, 5 is the coefficient.Hope it helps.
Do comment if you have any query.
Find the volume of a cone with a raduia of 13 and a height of 32
the volume is 5663.24436
in a sale, the price of a computer is reduced by 20%. At this reduced price the shopkeeper still makes a profit of 20%. What would have been his percentage profit if the computer had been sold at full price?
Based on the price the computer was reduced by and the profit the shopkeeper still made, if the computer was sold at full price, the profit percentage would have been 50%.
What would the profit have been at full price?First assume a price the computer was sold at. We'll go with $100.
At this price, the shopkeeper still made a profit of 20% which means that the cost price was;
= 100 / (1 + 20%)
= $83.33
Based on the discounted price of $100, the full price was:
= 100 / (1 - 20%)
= $125
The profit the shopkeeper would have made is:
= (Full price - Cost price) / Cost price x 100%
= (125 - 83.33) / 83.33 x 100%
= 50%
#SPJ1
Find out more on percentage discounts at https://brainly.com/question/1453984.
How do I find the length of K?
Answer:
i) 3.7 cm
ii) 3.0 cm
Step-by-step explanation:
When you are given side lengths and angle measures, trig functions will generally be involved in solving the triangle. The mnemonic SOH CAH TOA is intended to remind you of the trig relations pertaining to a right triangle.
__
i)The sides adjacent to the angle and opposite the angle are given. The relevant relation is ...
Tan = Opposite/Adjacent
tan(63°) = k/(1.9 cm)
k = (1.9 cm)tan(63°) ≈ 3.7 cm
The length k is about 3.7 cm.
__
ii)Again, the tangent function can be used to solve this triangle.
tan(42°) = (2.7 cm)/p
p = (2.7 cm)/tan(42°) ≈ 3.0 cm
The length p is about 3.0 cm.
Enter the equation of the circle with the given center and radius.
Center. (0,7); radius: 9
The equation of the circle is
?
Equations of circles are typically organized in the following form:
[tex](x-h)^2+(y-k)^2=r^2[/tex]
[tex](h,k)[/tex] is the center [tex]r[/tex] is the radiusSolving the QuestionWe're given:
Center: (0,7)Radius length: 9 unitsPlug the given information into [tex](x-h)^2+(y-k)^2=r^2[/tex]:
[tex](x-0)^2+(y-7)^2=9^2[/tex]
[tex]x^2+(y-7)^2=81[/tex]
Answer[tex]x^2+(y-7)^2=81[/tex]
For what values of "x" is the inequality 3(x+2)-x<8 true?
x > 1
x < 1
x < 7
x > 7
We can't determine right off the bat what values of x make this inequality true, so we should solve it first.
First, use the distributive property and distribute 3 :
3(x+2)-x<8
3x+6-x<8
Now subtract 6 on both sides :
3x-x<8-6
3x-x<2
now , subtract the x's :
2x<2
Divide by 2 on both sides :
x<1
So the values of x less than 1 make this inequality true.Let's try -1 (-1 is less than 1)
Plug it in ↓
3(-1+2)-(-1)<8
3(1)+1<8
3+1<8
4<8
4 is less than 8.
Therefore, the values of x that make this inequality true are indeed less than 1.hope helpful ~
Answer:
x < 1
Step-by-step explanation:
Expand the brackets: 3 * x = 3x and 3 * 2 = 6
Current inequality: 3x + 6 - x < 8
Collect like x terms: 3x - x = 2x
Current inequality: 2x + 6 < 8
Collect like integer terms: subract 6 from both sides
Current inequality: 2x < 2
Convert 2x to x: divide both sides by 2
Final answer = x < 1
Hope this helps :)
I don't know how to answer this, please help!
4/9,-4/3, 4 what comes next?
Answer:
-12
Step-by-step explanation:
because 4 will be multiplied by-3 since 4/9 was multiplied by-3 to get -4/3 and -4/3 was multiplied by-3 to get 4
On March 8, 2003, the world's largest taco was made in the city of Mexicali, Baja. The taco contained approximately 1 kg of onion for every 6.6 kg of grilled steak. The total weight of these two ingredients was 617.6 kg. To the nearest tenth of a kg, how many kg of onions and grilled beef were used to make the taco?
A. Onions: 62.3 kg; Beef: 555.3 kg
B. Onions: 81.3 kg; Beef: 536.3 kg
C.Onions: 34.6 kg; Beef: 583 kg
D. Onions 101.9 kg; Beef: 515.7 kg
Answer:
B. Onions: 81.3 kg; Beef: 536.3 kg
Step-by-step explanation:
6.6x = 6.6*81.26 = 536.32 kg (amount of grilled steak in the taco)
i think thats right
Answer: A. i think it is
Step-by-step explanation:
Solve the equation. -2=6/7p
HURRY!
Answer:
[tex]\boxed{\sf{p=-\dfrac{3}{7}=-0.42 }}[/tex]Step-by-step explanation:
Isolate the term of p from one side of the equation.
-2=6/7pFirst, multiply by 7p from both sides.
-2*7p=6/7p*7p
Solve.
-14p=6
Then, you divide by -14 from both sides,
-14p/-14=6/-14
Solve.
p=-3/7
Dividing is another option.
-3/7=-0.42
Therefore, the correct answer is p=-3/7=-0.42.I hope this helps you! Let me know if my answer is wrong or not.
Kelley has 18 hours of work to do on her science fair project. She has 2 weeks to complete her project. How many hours does she need to work on her project each week to complete it on time?
Answer:
9
Step-by-step explanation:
Brainly patrol deleted my answer and i have no idea why but-
She has 2 weeks, so 18/2 is 9. 9 hours each week
Select the correct answer.
Consider the given function. Which graph represents the given function?
Answer:
Given:
f(x) = 5 when x < -2f(x) = 3 when -2 ≤ x < 0f(x) = 0 when 0 ≤ x < 2f(x) = -3 when x ≥ 2< or > = open circle
≤ or ≥ = closed circle
So we are looking for:
open circle at (-2, 5) with a line to the leftclosed circle at (-2, 3) with a line segment to an open circle at (0, 3)closed circle at (0, 0) with a line segment to an open circle at (2, 0)closed circle at (2, -3) with a line to the rightTherefore, the attached is the correct answer.
Find the value of x. 5x° 65°
Answer:
B. 23
Step-by-step explanation:
Total = 180° for a supplementary angle.
5x + 65 = 180
5x = 180 - 65
5x = 115
x = 115/5
x = 23
Answer:
B. 23
Step-by-step explanation:
The sum of the angles that creates a straight line is 180 degrees. So we can write the equation
5x + 65 = 180
Solve for x by first subtracting 65 on both sides
5x = 115
Then divide both sides by 5
x=23