3 years ago

How do we figure out the value of a variable?

Mathematics

2 answers:

mafiozo [28]3 years ago

8 0

Answer:

To figure out the value of a variable you plug it into an equation solve for it using the equation around it.

Margaret [11]3 years ago

5 0

Answer:

Step-by-step explanation:

Solve for the unknown variable(number) by moving everything to the other side of the equation.

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-3x2( 7x2 - x + 4)<br> What is the answer

Lerok [7]

Answer:

6x-108

Step-by-step explanation:

-3 · 2(7 · 2 - x + 4)

= ((−3)(2))((7)(2) +− x + 4)

= −84 + 6x − 24

= 6x − 108

The answer is 6x - 108

6 0

2 years ago

The variable z is inversely proportional to x. When x is 16, z has the value 0.875. What is the value of z when x= 21?

ziro4ka [17]

For $z$ and $x$ to be inversely proportional, there must be some constant $k$ such that

$zx=k$

Given that $z=0.875$ when $x=16$ , it follows that

$0.875\cdot16=k\implies k=14$

Then when $x=21$ , we have

$21z=14\implies z=\dfrac{14}{21}=\approx0.667$

8 0

3 years ago

goldfiish [28.3K]

Answer:

The volume of can A is half the volume of can B.

Step-by-step explanation:

Given

Can A and Can B

Required

The true statement

For Can A, we have:

$h =8$