4 years ago

What expression is equivalent to -5(3x- 4)

Mathematics

1 answer:

Alex17521 [72]4 years ago

6 0

Answer:

= -15x +20

Step-by-step explanation:

-5(3x- 4)

= -5×3x- 4×-5

= -15x +20

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A line through the points $(2, -9)$ and $(j, 17)$ is parallel to the line $2x + 3y = 21$. What is the value of $j$?

lys-0071 [83]

Answer:

j=-37

Step-by-step explanation:

step 1

Find the slope of the given line

we have

$2x+3y=21$

Convert to slope intercept form

Isolate the variable y

subtract 2x both sides

$3y=-2x+21$

divide by 3 both sides

$y=-\frac{2}{3}x+7$

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$m=-\frac{2}{3}$

step 2

we have the points

(2,-9) and (j,17)

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The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

substitute

$m=\frac{17+9}{j-2}$

$m=\frac{26}{j-2}$

Remember that

If two lines are parallel then their slope are equal

therefore

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3 years ago

What is the least common denominator of 3, x, and x?

sergiy2304 [10]

Answer:

Step-by-step explanation:

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you have 1 x not 2.

Suppose you have

y/3 + 3y/x + 7y / x

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Answer: LCM = 3 * x

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2 years ago