20 - b/4 = 23 what is the variable number

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

3 0

Answer:

$b=-12$

Step-by-step explanation:

$20-\frac{b}{4} =23$

→ Minus 20 from both sides

$-\frac{b}{4} =3$

→ Multiply both sides by -4

$b=-12$

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Nancy uses 4 potatoes to make a casserole for 5

Brums [2.3K]

Answer:

for 5 people = 4 potatoes

remaining people = 13-5 =8

3 p0tatoes for four people

so 6 potatoes for 8 pe0ple

total potatoes used = 6+4 = 10

Step-by-step explanation:

4 0

4 years ago

An aquarium can be modeled as a right rectangular prism. Its dimensions are 14 in by 7 in by 4 in. If the aquarium contains 153

musickatia [10]

A right rectangular prism can be used to simulate an aquarium. Its measurements are 14 by 7 by 4 inches. If there are 153 cubic inches of water in the aquarium, There is a 61 % empty space.

<h3>What is volume?</h3>

The term “volume” refers to the amount of three-dimensional space taken up by an item or a closed surface. It is denoted by V and its SI unit is in cubic cm.

The volume of the aquarium is;

V=14 × 7 × 4 = 392 inch³

The % by which the container is empty is found as;

$\%Empty= \frac{392-153}{392} \times 100 \ \\\\ \%Empty= \frac{239}{392} \times 100 \\\\ \%Empty= 61\%$