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shutvik [7]
3 years ago
13

Explain 2 ways to evaluate 15(90-3)

Mathematics
2 answers:
Elena L [17]3 years ago
8 0
Distribute the 15 first or subtract inside the parentheses first and then multiply
pychu [463]3 years ago
5 0
First Way:

15(90-3)

=15(10*9-3)

=15*10*9-15*3

=150*9-45

=1,350-45

=1,305

-----------------

Second Way:

15(90-3)

=15(87)

=15(80+7)

=15(10*8+7)

=15*10*8+15*7

=150*8+(10+5)*7

=1,200+70+35

=1,200+105

=1,305
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3 years ago
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The perimeter of a piece of paper is 38 inches. Its length is 11 inches.
Rainbow [258]

Answer:

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Step-by-step explanation:

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3 years ago
A scale drawing of a square object has a scale of 1 in. : 5 mm. The scale drawing has a length of 2.5 inches. Find the perimeter
luda_lava [24]

Answer:

Perimeter and area of drawing

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Area = 6.25 In²

Perimeter and area of object

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Area = 167.936 mm²

Step-by-step explanation:

We are dealing with a square object, so let's talk about the drawing first.

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Letd note that 1 inch =

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So 2.5 Inch = 2.5 * 25.4

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25.4 mm is to 5mm

63.5 mm is to (63.5*5)/24.5

63.5mm is to 12.959 mm

So the length of actual object is 12.959mm

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Area = 12.959²

Area = 167.936 mm²

7 0
3 years ago
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professor190 [17]
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6 0
3 years ago
Read 2 more answers
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