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viva [34]
4 years ago
15

Which expressions are equal to 4 when x = 7 and y = 2?

Mathematics
1 answer:
Vikki [24]4 years ago
6 0
A. x-y-1, B. x-(6/y) and C. xy-8

A. 7-2=5
5-1=4

B.7-(6/2)
order of operations
parentheses
6/2=3
7-3=4

C. 7(2)-8
7(2)=14
14-8=4

Not D, because
7+2-4
7+2=9
9-4=5
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18 – 12 + x = 10 What value of x makes the equation true? * explanation plz
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Answer:

x = 4

Step-by-step explanation:

Solve for x:

x - 12 + 18 = 10

Hint: | Group like terms in x - 12 + 18.

Grouping like terms, x - 12 + 18 = x + (18 - 12):

x + (18 - 12) = 10

Hint: | Evaluate 18 - 12.

18 - 12 = 6:

x + 6 = 10

Hint: | Isolate terms with x to the left hand side.

Subtract 6 from both sides:

x + (6 - 6) = 10 - 6

Hint: | Look for the difference of two identical terms.

6 - 6 = 0:

x = 10 - 6

Hint: | Evaluate 10 - 6.

10 - 6 = 4:

Answer: x = 4

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3 years ago
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tatiyna
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How many unit cubes will fit in a rectangular prism with a volume of 15 cubic units?
horsena [70]

Answer:

15 cubes

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I think this
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