MATHEMATICS MIDDLE SCHOOL

The energy released by metabolism of 1 average candy bar is 1 x 10^6 joules. The energy needed for 1 hour of running for an adult is 4.5 x 10^6 joules. Use this information to determine how many average candy bars an adult would have to eat to supply the energy needed for seven hours of running.

Answers

Answer 1
Answer:

Answer: 32

Step-by-step explanation:

Given: The energy needed for 1 hour of running for an adult =4.5*10^6\ joules.

Therefore. the energy needed for seven hours of running==7*4.5*10^6\ joules.=31.5*10^6\ joules

Since, he energy released by metabolism of 1 average candy bar =1*10^6\ joules.

Therefore, the number of candy bars an adult need to eat  to supply the energy needed for seven hours of running.=(31.5*10^6)/(1*10^6)=31.5\approx32

Hence, the adult need to eat 32 candies to supply the energy needed for seven hours of running.
Answer 2
Answer:

Answer:32

Step-by-step explanation:

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Answers

Hello!

The answer is: The third option, 0.

Why?

We are asked to find (f-g) evaluated in 144, so the definition states that:

(f-g)(x)=f(x)-g(x)

So,

f(x)-g(x)=√(x) +12-2√(x)=-√(x) +12

We must remember that evaluating a function means replacing the variable with the given value, for this case it's 144.

Then, evaluating:

(f-g)(144)=-√(144)+12=-12+12=0

Hence, if:

(f-g)(144)=0

The correct option is the third option, 0.

Have a nice day!

Answer:

0

Step-by-step explanation:

Substitute x = 144 into the expression for f(x) - g(x)

√(144) + 12 - 2√(144)

= 12 + 12 - (2 × 12)

= 12 + 12 - 24

= 0

David says you can have an unlimited number of equivalent fractions to any given fraction. Is he right?

Answers

Yes, David is correct.
We can test our hypothesis by setting up an experiment.
1   2    4   6    7
2   4    8   16  14
AND SO ON!
yes, multiply the numerator and denominator by the same number again and again to keep getting different equivalent fractions.

Olivia has 109 pennies. Liza has 2,457 dimes. Chris has 8,078 quarters. How much money in total do they have altogether

Answers

109*0.01+2457*0.1+8078*0.25=2266.29 dollars

Simplify.
Please give an explanation or step-by-step answer.

Answers

(2y)/(y^2-9y+18)-(1)/(y-6)=\n(2y)/(y^2-3y-6y+18)-(1)/(y-6)=\n(2y)/(y(y-3)-6(y-3))-(1)/(y-6)=\n(2y)/((y-6)(y-3))-(1)/(y-6)=\n(2y)/((y-6)(y-3))-(y-3)/((y-6)(y-3))=\n(2y-y+3)/((y-6)(y-3))=\n(y+3)/((y-6)(y-3))

#17 PLZ help I don't know what to do?!?!?!

Answers

(4)/(7)\cdot(7)/(13)=4\cdot(1)/(13)=(4)/(13)\Rightarrow B

Tom knows that in his school 10out of every 85 students are lefthanded. There are 391 students in Toms school. How many studentd in toms school are left handed

Answers

To do this, first divide 85 by 10

You get 8.5

Then, divide 391 by 8.5

You get 46

Therefore, 46 students are left-handed in Tom's school.

Hope this helped!
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