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Olenka [21]
2 years ago
11

TIMED!!!

Mathematics
2 answers:
san4es73 [151]2 years ago
5 0

Answer: 1080

Step-by-step explanation:

guajiro [1.7K]2 years ago
4 0

Answer: Last option.

Step-by-step explanation:

The total amount of concrete in the ramp (V_t) will be the sum of the volume of the  rectangular prism (V_{rp}) and the volume of the triangular prism (V_{tp})

V_t=V_{rp}+V_{tp}

The formulas are:

V_{rp}=lwh

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

 V_{tp}=\frac{bhl}{2}

Where "l" is the lenght, "b" is the base and "h" is the height.

Substituting, we get:

V_t=V_{rp}+V_{tp}\\\\V_t=lwh+\frac{bhl}{2}\\\\V_t=(18in)(6in)(6in)+\frac{(8in)(6in)(18in)}{2}\\\\V_t=1,080in^3

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Brianna has $2.80 in quarters, dimes and nickels in her purse. She has nine more dimes than quarters and six more nickels than q
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Answer:

She has 4 quarters, 13 dimes, and 10 nickels in her purse

Step-by-step explanation:

Let q be the amount of quarters, d be the amount of dimes, and n be the amount of nickels she has in her purse. We can use this to set up a system of equations:

25q+10d+5n=280

This is because a quarter is 25 cents, a dime is 10 cents, and a nickel is 5 cents. We also have to convert $2.80 to cents since all our other values are in cents.

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40q=160

Divide both sides by 40

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d=q+9=4+9=13

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She has 4 quarters, 13 dimes, and 10 nickels in her purse

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