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Afina-wow [57]
3 years ago
12

3x - 7y + 10 when x = 4 and y =2

Mathematics
2 answers:
Tpy6a [65]3 years ago
8 0

Answer:

8

Step-by-step explanation:

replace x with 4 and y with 2 in the equation

3x - 7y + 10

3(4) - 7(2) + 10

multiply

12 - 14 +10

add

-2 + 10 = 8

jonny [76]3 years ago
5 0

Answer:

8

Step-by-step explanation:

you need to multiply 3 and 4

then subtract 7 and 4 and add 10

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The average of 12, 17, 19 and x is 25. Find x.
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Answer:

x = 52

Step-by-step explanation:

Formula

\dfrac{\text{12+17+19+x}}{4} = \text{25}

Combine the left

\dfrac{\text{48+x}}{4} = \text{25}

Multiply both sides by 4

4*(48 + x)/4 = 25 * 4

48 + x = 100                    Subtract 48 from both sides

48 - 48 +x = 100 - 48      Combine

x = 52

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3 years ago
The surface area of a cube is 328.56 square inches. How long are it’s sides?
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Answer:

7.4 in

Step-by-step explanation:

Surface area of a cube = 6s²

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4 0
3 years ago
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mario62 [17]

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