PLEASE HELP WITH THISSS

I’m confused could you please help me with this question???

madreJ [45]

Answer:

66

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Which of the following is not a factor of x^3 – 3x^2 – 4x + 12?

Slav-nsk [51]

Answer:

c. (x + 3)

Step-by-step explanation:

using factor theorem

if x - 3 is a factor then p(a) = 0

p(a)= x^3 - 3x^2 - 4x + 12

a.(x-3)

p(3) = (3)^3 - 3(3)^2 - 4(3) + 12

= 27 - 27 - 12 + 12

= 0

therefore x-3 is a factor

b.(x + 2)

p(-2) = (-2)^3 - 3(-2)^2 - 4(-2) + 12

= -8 -12 + 8 + 12

,= 0

therefore x + 2 is a factor

c.(x + 3)

p(-3) = (-3)^3 - 3(-3)^2 - 4(-3) + 12

= -27 -27 + 12 + 12

= -30

therefore x + 3 is not a factor

d.(x-2)

p(2) = (2)^3 - 3(2)^2 - 4(2) + 12

= 8 -12 - 8 + 12

= 0

therefore x - 2 is a factor

4 0

3 years ago

PLEASE NEED HELP....I NEED TO FINISH IN ABOUT AN HOUR....PLEASE

s344n2d4d5 [400]

Answer: ∠R = 137°

Step-by-step explanation:

The opposite angles of a quadrilateral are supplementary (equal to 180°).

Since ∠P and ∠R are opposite angles, their sum is 180°

∠P + ∠R = 180°

y + 3y + 8 = 180

4y + 8 = 180

4y = 172

y = 43

∠R = 3y + 8

= 3(43) + 8

= 129 + 8

= 137

8 0

3 years ago

In rectangle PQRS, SQ = 78, PS = 30, and mPRS = 23°. Find SR.

kondor19780726 [428]

$\cos (23)=\frac{sr}{78}\rightarrow78\cdot\cos (23)=SR=67.20$

7 0

2 years ago

help with number 1 please! it would be very helpful if you would show all the steps so i can learn how to do it. thank you!

torisob [31]

The problem to solve is:

The goal here is to solve
y=-2x-7 and
y=-3x-9 for the variables y and x.

First, let's work on your first equation,y=-2x-7This means, see if it can be simplified at all before attempting to solve it.
Multiply x and 2Multiply x and 1The x just gets copied along.The answer is xx2*x evaluates to 2xBecause of the minus sign2x becomes - 2xThe answer is -2x-2*x-7 evaluates to -2x-7So, all-in-all, your first equation can be written as: y = -2x-7Now, let's work on your second equation,y=-3x-9 Multiply x and 3Multiply x and 1The x just gets copied along.The answer is xx3*x evaluates to 3xBecause of the minus sign3x becomes - 3xThe answer is -3x-3*x-9 evaluates to -3x-9So, all-in-all, your second equation can be written as: y = -3x-9After this initial survey of the equations, the system of equations we'll set out to solve is:
y = -2x-7 and y = -3x-9Let's start by solving y = -2x-7 for the variable y.

To isolate the y, we have to divide both sides of the equation by the other variables
around the y on the left side of the equation.
and this is the final solution to your equation.Next, let's solve y = -3x-9 for the variable x.
Move the y to the right hand side by subtracting y from both sides, like this:
From the left hand side:
y - y = 0The answer is 0From the right hand side:
The answer is -3x-9-y
Now, the equation reads:
0 = -3x-9-yMove the -3x to the left hand side by adding 3x to both sides, like this:
To the left hand side:
The answer is 3xTo the right hand side:
-3x + 3x = 0xThe answer is -9-y
Now, the equation reads:
3x = -9-y
To isolate the x, we have to divide both sides of the equation by the other variables
around the x on the left side of the equation.
The last step is to divide both sides of the equation by 3 like this:
To divide x by 1The x just gets copied along in the numerator.The answer is x3x ÷ 3 = xTo divide -9-y by 3divide each term in -9-y by 3 term by term.-9 ÷ 3 = -3To divide y by 1The y just gets copied along in the numerator.The answer is y-y ÷ 3 =The solution to your equation is:
x =Now, plug the earlier result, y=-2x-7, in for y everywhere it occurs in
x=-3-1/3y.
This gives x=-3-1/3(-2x-7). Now all we have to do is solve this for x,to have our first solution.
Because of the minus sign3 becomes - 3The answer is -31/3 evaluates to Multiply x and 2Multiply x and 1The x just gets copied along.The answer is xx2*x evaluates to 2xBecause of the minus sign2x becomes - 2xThe answer is -2x-2*x-7 evaluates to -2x-7Multiply by -2x-7we multiply by each term in -2x-7 term by term.This is the distributive property of multiplication.Multiply and -2xMultiply 1 and xThe x just gets copied along.x × -2x =Multiply and -71 × -7 =1/3*(-2*x-7) evaluates to -3 - =The answer is-3-1/3*(-2*x-7) evaluates to Move the to the left hand side by subtracting from both sides, like this:
From the left hand side:
x - =The answer isFrom the right hand side:
 - = 0The answer is
Now, the equation reads:
=
To isolate the x, we have to divide both sides of the equation by the other variables
around the x on the left side of the equation.
The last step is to divide both sides of the equation by like this:
To divide x by 1The x just gets copied along in the numerator.The answer is x ÷ = x ÷ = -2The solution to your equation is:
x = -2Lastly, to find the solution for y, we plug this answer for x into the earlier result that
y=-2x-7.
This gives y=-2(-2)-7. Now, simplify this.
Because of the minus sign2 becomes - 2The answer is -22 becomes - 2Multiply -2 and -21-2*(-2) evaluates to 4-2*(-2)-7 evaluates to -3y= -3So, the solutions to your equations are:
y= -3 and x= -2Because of the minus signThe answer is -2

5 0

3 years ago