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vitfil [10]
3 years ago
13

2(9a-7) I have to simplify this idk why to do

Mathematics
2 answers:
Dvinal [7]3 years ago
8 0
You would times 2 by 9a because 9a-7 is in parenthesis and when it’s in parenthesis you do it first then you times 2 by -7 and get -14. Now you have 18a-14
Tasya [4]3 years ago
5 0
18a-14 Would be your answer because you are basically distributing which is taking the number on the out side of the parenthesis and multiplying it by all the numbers inside of the parenthesis
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Determine the equation of each line with the following properties:
iris [78.8K]

Answer:

a) y =2/3 x + 7.

b) x = -1

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Step-by-step explanation:

a) Intercept form y = mx + b where m = 2/3 and  b = 7

b) y can take any value but x is always -1.

c) Slope m = (-1-3)/ (1 - -4)

= -4/5

Using point-slope form where m = -4/5 and x1 y1 = 1 , -1:

y - y1 = m(x - x1)

y - -1 = -4/5(x - 1)

y + 1 = -4/5x + 4/5

y = -4/5 x - 1/5

d)  The slope m of the line perpendicular to this line is:

-1 / 2/3

m = -3/2.

When x = -1 , y = 4 so using the slope intercept form of a line

y = mx + b

4 = -3/2 * -1 + b  where b = the y-intercept.

4 = 3/2 + b

b = 4 - 3/2 = 5/2.

The equation is  y = -3/2 x + 5/2.

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