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vovikov84 [41]
3 years ago
11

To add 20.4 + 3.75 + 4.25, Crystal first added 3.75 and 4.25. Which property did Crystal use to add mentally?

Mathematics
1 answer:
Black_prince [1.1K]3 years ago
3 0

Answer:

A) Associative Property of Addition

Step-by-step explanation:

<u><em>Associative Property of Addition</em></u>

Let A, B and C  be any three real numbers

A+(B+C) = (A+B) + C

Given data

(20.4 + 3.75) + 4.25 =  20.4 + (3.75 + 4.25)

                                 =  20.4 + 8.0

                                =  28.4

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Mariulka [41]

Answer:

Width: x + 3

(Length, width):

(5,4) (6,5) (7,6)

Step-by-step explanation:

x² + 7x + 12

x² + 4x + 3x + 12

x(x + 4) + 3(x + 4)

(x + 4)(x + 3)

Longer one is the length,

With is (x + 3)

x = 1,

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x = 2,

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3 0
2 years ago
A line drawn between the two pupils of the eyes defines which of the positioning lines?
user100 [1]

Answer:

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Step-by-step explanation:

go give your self a bj

4 0
3 years ago
Read 2 more answers
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Effectus [21]

Answer:

x=59 y= 81 z= 99

Step-by-step explanation:

z=

180-(57+24)=99

y=180-99=81

x= 40+81=121

180-121=59

3 0
2 years ago
the first Indianapolis 500 auto race took place in 1911. the winning car covered the 500 miles in 6.7 hours. what was the winnin
Vesna [10]

Average speed = (distance covered) / (time to cover the distance)

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                         =            (500 / 6.7)  (mile/hour)

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I imagine there were quite a number of pit stops included in that.

This is faster than I expected when I first read your question.
That's really gettin' with it for cars in 1911 !

4 0
3 years ago
Which figures are polygons?
castortr0y [4]
Your answer would be A, B, and C.
8 0
3 years ago
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