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3 years ago

Please help me answer I need this question right, one more wrong answer and I'll fail

Mathematics

1 answer:

Shkiper50 [21]3 years ago

6 0

Answer: The second option.

Step-by-step explanation:

1. Calculate the first volume assuming that the figure is completed (with no missing part). Therefore, you must apply the formula for calculate the volume of a square prism:

$V_A=s^{2}*h$

Where s is the side of the base and h is the height.

2. Then:

$V_A=(40cm)^{2}*50cm=80,000cm^{3}$

4. The volume of the missing part is calculated with the formula of a rectangular prism:

$V_B=l*w*h$

Where l is the lenght, w is the width and h is the height. Then:

$V_B=(40cm)(40cm-35cm)(50cm-25cm)=5,000cm^{3}$

5. Therefore, you must subtract both volumes to obtained the volume of the figure:

$V_f=80,000cm^{3}-5,000cm^{3}=75,000cm^{3}$

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Answer:

No. See the explanation below.

Step-by-step explanation:

No makes sense.

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Answer:

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Step-by-step explanation:

Let's set a few variables:

Number of math problems = m

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m + h = 42

We also know that our math homework has 6 problems more than 3 times the number of history problems.

m = 3*h + 6

So m is 3 times h, plus 6.

m + h = 42

We can subtract h from both sides of this equation.

m = 42 - h

Now we can put this value for m, 42-h, into our other equation.

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Adding h to both sides:

36 = 3*h + h

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m = 42 - h

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Answer:

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