3 years ago

At sunrise the temperature in Anchorage was -4°F. By 2pm the

Mathematics

1 answer:

Ainat [17]3 years ago

6 0

The answer is 19 degrees F.

15 - (-4) = 19

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miv72 [106K]

Answer:

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Step-by-step explanation:

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3 years ago

The area of a square postcard is 25 square inches. How long is each side postcard?

ivolga24 [154]

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5 inches

Step-by-step explanation:

To find the area of a square the formula is A = bh which with a square is essentially one side squared. We know this because every side of a square is the same. We also know that 5 squared is 25 meaning the answer is 5 inches(You could also use the formula A = bh : A = 5 x 5 : A = 25).

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What is the justification for the step taken from line 2 to line 3?

stiv31 [10]

Step-by-step explanation:

$3x+9-7x=x+10+x\\-4x+9=2x+10\\-6x+9=10\\$

In the line 2, only variables were operated with a reduction of similar terms in each side of the equation, giving as result -4x at one side, and 2x at the other side.
In the line 3, terms with variables were joined together in one side of the equation, and then, they were operate it, given as result -6X.