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3 years ago

-5x(x-4)=-30 Could someone please help me as soon as they can :\

Mathematics

1 answer:

Flura [38]3 years ago

7 0

Answer: 2 + √10 , 2 − √10

Step-by-step explanation:

-5x(x-4) = -30

divide by -5

x(x - 4) = -30

distribute the x

x^2 - 4x = 6

move the 6 to the left to have the equation equal zero

x^2 - 4x - 6 = 0

plug into the quadratic formula & solve

= 2 + √10 , 2 − √10

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Suppose PR = 54, solve for QR 4x-1 3x-1 P R

Svet_ta [14]

Answer:

$QR = 23$

Step-by-step explanation:

P, A, and R are collinear.

PR = 54

$PQ = 4x - 1$

$QR = 3x - 1$

To solve for the numerical length of PR, let's generate an equation to find the value of x.

According to the segment addition postulate:

$PQ + QR = PR$

$(4x - 1) + (3x - 1) = 54$ (substitution)

Solve for x

$4x - 1 + 3x - 1 = 54$

Combine like terms

$4x + 3x - 1 - 1 = 54$

$7x - 2 = 54$

Add 2 to both sides

$7x - 2 + 2 = 54 + 2$

$7x = 56$

Divide both sides by 7

$\frac{7x}{7} = \frac{56}{7}$

$x = 8$

$QR = 3x - 1$

Plug in the value of x into the equation

$QR = 3(8) - 1 = 24 - 1$

$QR = 23$

5 0

4 years ago

What is the equation of the line that passes through the point (-1, -2) and is parallel to the line with equation -3x+y=4

Ivanshal [37]

Y = 3x + 1
Parallel lines have the same slope so the slope would be 3. Take the given equation and add the 3x to the other side. Using the given point. -2 (y point) = 3(-1(x point)) + b. Solve for b by adding the 3 over. b = 1 which is your y intercept.

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3 years ago

BRAINLIEST! URGENT HELP!!!!!!

Vikki [24]

It's -5/2,-4 is right. ok?

4 0

3 years ago

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