3 years ago

Jeanine is twice as old as her brother Marc. If the sum of their age is 24, how old is Jeanine

Mathematics

2 answers:

Vesna [10]3 years ago

5 0

Jeanine is 12 years old

raketka [301]3 years ago

3 0

Jeanine is 16 years old. Marc is 8 years old.

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What is the approximate volume of a cylinder with a diameter of 12 meters and a height of 7 meters? Use 3.14 for pi.

kkurt [141]

$V=\pi r^2 h$
r - radius, h - height
The diameter is twice the radius.

$d=12 \ m \\
r=\frac{12}{2} \ m = 6 \ m \\
h=7 \ m \\ \\
V=\pi \times 6^2 \times 7=\pi \times 36 \times 7=252 \pi \approx 252 \times 3.14=791.28 \approx 791.3$

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son4ous [18]

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In two or more complete sentences explain how you would set up and solve the following equation: Peter opened his account with $

Lilit [14]

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Solve the following system of equations by linear combination: 3d – e = 7 d + e = 5

SashulF [63]

3d - e = 7d + e = 5 ⇒ 3d - e = 5
7d + e = 5

3d - e = 5
7d + e = 5 +
-----------------------
10d / = 10
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3 years ago