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Ainat [17]
3 years ago
10

Use distribute property and simplify Help me please​

Mathematics
2 answers:
koban [17]3 years ago
6 0

Step-by-step explanation:

must calculate the number in ( ) first before calculate the number in [ ]

- - > +

+ + > +

+ - > -

- + > -

stellarik [79]3 years ago
5 0

Answer:

104

155

180

Step-by-step explanation:

an easy way is to solve what is in the parenthesis then multiply by the outside number

but if you need to use the distributive property:

1. 4 x (20 - -6)

(4 x 20) - (4 x -6) = 80 - -24 = 80 + 24 = 104

2. -5 x (24 - -7)

(-5 x 24) - (-5 x -7) = -120 - 35 = 155

3. 12 x (-30 + 45)

(12 x -30) + (12 x 45) = -360 + 540 = 180

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Step-by-step explanation:

7 0
2 years ago
The mean number of words per minute (WPM) read by sixth graders is 86 with a variance of 225. If 44 sixth graders are randomly s
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P(X<=x) = 1 + 5.486 = 6.486

The z-score of the information given is,

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Where,

µ = mean

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From the information given,

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hence,

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thus,

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2 years ago
What is the shape of the cross-section formed when a plane containing line AC and line EH intersects this cube? What is the area
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Step-by-step explanation:

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then + 10% of that total for overhead costs.


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