madisonmcelvany2404

19.04.2021 •

Mathematics

What is the approximate volume of the right pyramid represented by this net?
16 cm

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Ответ:

taylorlanehart

28.07.2021

Mathematics

$15\text{ mph}$

Step-by-step explanation:

GIVEN: Ken and Joe leave their apartment to go to a football game $45\text{ miles}$ away. Ken drives his car $30\text{ mph}$ faster than Joe can ride his bike.

TO FIND: If it takes Joe $2\text{ hours}$ longer than Ken to get to the game, what is Joe’s speed.

SOLUTION:

Let the speed of joe be $x\text{ mph}$

Speed of Ken $=(x+30)\text{ mph}$

Total distance to go to football game $=45\text{ miles}$

$Time=\frac{Distance}{Speed}$

Total time taken by Joe is $2\text{ hours}$ longer than Ken.

$\frac{45}{x}=\frac{45}{(x+30)}+2$

$\frac{45}{x}=\frac{45+2(x+30)}{(x+30)}$

45(x+30)=x(105+2x)

2x^2+60x-1350=0

x=-70,15

$x=15\text{ mph}$

hence speed of joe is $15\text{ mph}$

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What is the approximate volume of the right pyramid represented by this net? 16 cm