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3 years ago

Please please please help me with this answer

Mathematics

1 answer:

maksim [4K]3 years ago

6 0

if the girls are "g" and the boys are "b"

g + b = 13

b = g + 7 <--- 7 more boys than girls

$\bf g+\boxed{g+7}=13\implies 2g=6\implies g=\cfrac{6}{2}\implies g=3\\\\\\\stackrel{\textit{since there are 3 gals}}{b = g+7}\implies b=3+7$

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Naya [18.7K]

Answer:

Step-by-step explanation:

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2 years ago

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3 years ago

Help me find the volume of the composite figure

Butoxors [25]

Answer:

$V = 97.911in^3$

Step-by-step explanation:

Given

Shapes: Cube and Cone

Required

Determine the volume

First we calculate the volume of the cube

$V_1 = l^3$

Where

l = side length = 5.1

$V_1 = 5.1^3$

$V_1 = 132.651$

Next, calculate the volume of the cone using:

$V_2 = \frac{\pi r^2h}{3}$

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h = 5.1

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So, we have:

$V_2 = \frac{\pi r^2h}{3}$

$V_2 = \frac{\pi * 2.55^2 * 5.1}{3}$

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$V_2 = \frac{729.5805}{21}$

$V_2 = 34.74$

The volume of the figure is:

$V=V_1 - V_2$

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$V = 132.651 - 34.74$

$V = 97.911in^3$

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2 years ago

Cho khối lăng trụ có đáy là hình vuông a và chiều cao bằng 2a. Thể tích của khối lăng trụ đã cho bằng bao nhiêu

Alenkinab [10]

Answer:

Step-by-step explanation:

V=B*h=a*a*2a

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3 years ago

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sammy [17]

Answer:

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Step-by-step explanation:

The student first made an error in the step 2.

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So, it would be

–7y = (-7)*(16)+(-7)*(-2z)

=> -7y = -112 + 14z

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3 years ago

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