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3 years ago

Twice the sum of 18 and x is 42

Mathematics

1 answer:

nydimaria [60]3 years ago

4 0

Answer:

x=3

Step-by-step explanation:

We are taking 2 times the sum ( addition) of 18 and x

2 ( 18+x) = 42

Divide each side by 2

2 /2 ( 18+x) = 42/2

18+x = 21

Subtract 18 from each side

18+x-18 = 21-18

x = 3

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A line that is perpendicular to y=-2/7x+9y and that passes through the point (4, -6)

IrinaK [193]

--------------------------------------------------
Find Slope :
--------------------------------------------------
y = -2/7x + 9
Slope = -2/7
Perpendicular slope= 7/2

--------------------------------------------------
Find y - intercept :
--------------------------------------------------
y = mx + b
y = 7/2 x + b
At (4, -6)
-6 = 7/2 (4) + b
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b = -6 - 14
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--------------------------------------------------
Form equation :
--------------------------------------------------
y = mx + b
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3 years ago

Question 5 (1 point)

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Answer:

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Step-by-step explanation:

8 + 7 + 6 + 5 + 4 + 3 + 2 + 1/8

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