All categories

4 years ago

Find the solution set for x2 + 3x – 40 = 0.

1 answer:

8 0

I am going to assume that x2 = x squared
So: X^2 + 3x -40
= (X+8)(X-5)=0

X+8 = 0
X= - 8

The other solution is X -5 = 0
X = 5

Therefore the solution set is {-8, 5}

You might be interested in

Simplify the expression

Grace [21]

(-5+8*i)+(-9+5*i) evaluates to -14+13i

6 0

4 years ago

Given the figure below, find the values of x and z. (8x – 20) (14x – 20)

Gnesinka [82]

Answer:

Problem #1: x = 2.5

Problem #2: x = 10/7

Step-by-step explanation:

Step 1: Find the value of x in (8x - 20)

8x - 20 = 0

Add 20 to both sides

8x - 20 + 20 = 0 + 20

8x = 20

Divide both sides by 8

8x / 8 = 20 / 8

x = 2.5

Answer: x = 2.5

Step 2: Find the value of x in (14x - 20)

14x - 20 = 0

Add 20 to both sides

14x - 20 + 20 = 0 + 20

14x = 20

Divide both sides by 14

14x / 14 = 20 / 14

x = 10/7

Answer: x = 10/7

6 0

3 years ago

The angles in the diagram are supplementary

galina1969 [7]

Two Angles are Supplementary when they add up to 180 degrees. Notice that together they make a straight angle. But the angles don't have to be together.

3 0

3 years ago

What is -1/3+w=5 3/8 express in simplest form

Elodia [21]

Let's solve your equation step-by-step.
 $\frac{-1}{3}$ +w=5 $\frac{3}{8}$ 
Step 1: Simplify both sides of the equation.
w+ $\frac{-1}{3}$ = $\frac{43}{8}$ 
Step 2: Add $\frac{1}{3}$ to both sides.
w+ $\frac{-1}{3}$ + $\frac{1}{3}$ = $\frac{43}{8}$ + $\frac{1}{3}$ 
w= $\frac{137}{24}$ 

Answer:w=5 $\frac{17}{24}$

6 0

4 years ago

What is the volume of the right rectangular prism 16in 64in 140in 166in

nexus9112 [7]

Answer:

140 inches

Step-by-step explanation:

7 x 4 x 5 = 140

8 0

4 years ago