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3 years ago

13

A rental company charges $21 plus $18 per hour to rent a laptop. Mike rented a laptop for 9 hours. Write an expression to show h

ow to calculate the total amount Mike paid.

1 answer:

vredina [299]3 years ago

7 0

Answer:

y = 18x + 21

Step-by-step explanation:

Let x be the amount of hours of the renting and y the final cost

y = 18x + 21

In fact the final cost depends from the hours of the renting

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What is the value of 2x+1 is 20 greater than 8x+5?

Yuliya22 [10]

Answer:

x = -4

I hope this helps!

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3 years ago

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How to find the equation of a line <br> passesthrough (1,4) and is parallel to y=-4x-5

Vinvika [58]

Y=mx+b m=slope

so the equation that you want to find will have 1 for x and 4 for y and will have the same slope (-4) as y=-4x-5 but different 'b' value so

y=-4x
if we subsitute 1 for x we get
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4 years ago

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What is the measure of angle B in the triangle?

pentagon [3]

Answer: Angle B measures 70 degrees

Step-by-step explanation: One angle is given as 40 while the other two angles are yet unknown.

Remember that the sum of the interior angles in a triangle equals 180 degrees. In other words

Angle A + Angle B + Angle C = 180

Therefore

40 + (2x - 30) + (x + 20) = 180

40 + 2x - 30 + x + 20 = 180

By collecting like terms we have

40 - 30 + 20 + 2x + x = 180

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Subtract 30 from both sides of the equation

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Having calculated x = 50 we can now compute the value of angle B as follows;

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Angle B measures 70 degrees

8 0

3 years ago

1. Donald usually runs the same distance daily for a total of 28 miles per week, training for a marathon. This week he was unabl

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12miles

Step-by-step explanation:

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Select all the pairs of equivalent expressions.

iren2701 [21]

Answer:

$\huge\boxed{(3^4)^4=3^8\cdot3^8}\\\boxed{4^3\cdot5^3=20^3}\\\boxed{(4^3)^3=4^3\cdot4^3\cdo4^3}$

Step-by-step explanation:

$a^n\cdot a^n=a^{n+m}\\\\(a^n)^m=a^{n\cdot m}\\\\(a\cdot b)^n=a^n\cdot b^n\\=====================$

$(4^3)^3=4^{3\cdot3}=4^9\\4^3\cdot4^3=4^{3+3}=4^6\\\\4^9\neq4^6\to(4^3)^3\neq4^3\cdot4^3\\==================$

$(3^4)^4=3^{4\cdot4}=3^{16}\\3^8\cdot3^8=3^{8+8}=3^{16}\\\\(3^4)^4=3^8\cdot3^8\\================$

$6^4\cdot3^4=(6\cdot3)^4=18^4\\\\18^4\neq18^8\to6^4\cdot3^4\neq18^8\\=================$

$4^3\cdot5^3=(4\cdot5)^3=20^3\\\\4^3\cdot5^3=20^3\\=================$

$(4^3)^3=4^{3\cdot3}=4^9\\4^3\cdot4^3\cdot4^3=4^{3+3+3}=4^9\\\\(4^3)^3=4^3\cdot4^3\cdot4^3$

3 0

4 years ago