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Lesechka [4]
3 years ago
8

(7a-b+3) - (-2a-8b+8)

Mathematics
1 answer:
Mumz [18]3 years ago
5 0
(7a-b+3)-(-2a-8b+8)
Apply plus/minus rule.
-(-a)= a and -(a)=-a
we get
(7a-b+3)-(-2a-8b+8)= 7a-b+3+2a+8b-8
Add like terms
=9a+7b-5

Answer: 9a + 7b - 5
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This holiday weekend, Dave is going to Chicago to shop and see a baseball game. To avoid traffic, Dave decides to take the train
kondaur [170]

Answer:

k= 1 mile per minute

Step-by-step explanation:

There is a proportional relationship between the time (in minutes) Dave spends riding the train, x, and the distance he travels (in miles), y.

The table representing this information is given below:

\left|\begin{array}{c|ccccc}$x (minutes) & 8 &10&13&14 \\$y (miles) & 8 &10&13&14 \end{array}\right|

The equation of proportionality is given as: y=kx

When x=8, y=8

Substituting we have:

8=8k

Divide both sides by 8

k=1

Therefore, the constant of proportionality, k= 1 mile per minute

3 0
4 years ago
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Kitty [74]

Answer:

True

Step-by-step explanation:

we know that

A non-negative number is a real number greater than or equal to zero

In this problem

we have

x\geq 0

The solution of the inequality is all real numbers greater than or equal to zero   [0,∞)

Therefore

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3 0
3 years ago
What is the equation for slope 1/2 ; y-intercept (0, -7)
balu736 [363]

Answer:

Use the equation mx+b=y

mx represents the slope and b represents the y intercept.

So, this would mean the equation is : 1/2x + -7 = y


6 0
3 years ago
Read 2 more answers
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Dafna1 [17]

Answer:

132

Step-by-step explanation:

Straight lines add up to 180

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4 0
3 years ago
Are any of these in a 1:2:1 ration form? If so how do you know? Will mark as B.A
marysya [2.9K]

Answer:

No, none of these are in a 1:2:1 ratio form. To find out we simply divide the first number by the original number, then multiply the other original numbers by what we just got to find out if it works.

Let's try #1.

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#2 and #3

We can tell these are both wrong because the first and last number have to equal the same, but in these they are different.

Hope this helps you! :)

4 0
3 years ago
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