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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svlad2 [7]

What’s something goes up but never comes down?

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3 years ago

Please help and explain process too. Thank you!!

sergey [27]

The answer is x^2+2x-5

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2 years ago

Should you flip the inequality sign in this problem? -9x + 27 = -13 Yes no

Angelina_Jolie [31]

Answer:

Step-by-step explanation:no you should not

-9x+27=-13

-9x-27=13

-9x=18

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3 years ago

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John runs 4 miles in 30 minutes. at the same rate, how many miles would he run in 48 minutes?

dimulka [17.4K]

Make a ratio, then cross multiply.

4/30=x/48

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3 years ago

The tables below show running hours of three printers that produce greeting cards and the total number of greeting cards produce

AysviL [449]

ANSWER

The correct answer is A

EXPLANATION

To find the ink cost of each card coming from printer B, we need to find the total cost from printer B and the total number of cards printed by Printer B.

The total hours of all the three printers over the three weeks

$=40+45+55+50+50+30+45+40+60=415$

The total hours of printer B only

$=50+50+30=130$

Total number of cards produced over the three weeks

$=7950+7800+9600=25350$

We can use ratio and proportion to determine the total cards produce by printer B only.

$415:25350$

$130:x$

If less, more divides

$x=\frac{130\times 25350}{415} \approx7941$

Total cost of Printer B in 130 hours

$ $=130 \times 15=1950$

The ink cost

$=\frac{1950}{7941}$

$=0.2456$

$ $\approx 0.30$

to 2 decimal places

8 0

3 years ago

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