All categories

9 months ago

Solve. (Enter your answer using interval notation.) |3x + 15| > 21

Mathematics

1 answer:

Katarina [22]9 months ago

4 0

Answer:

(-∞, -12), (2, ∞)

(-∞, -12) U (2, ∞)

Step-by-step explanation:

|3x + 15| > 21, |3x + 15| < -21

3x + 15 > 21, 3x + 15 < - 21

-15 -15 -15 -15

------------------ -------------------

3x > 6 3x < - 36

÷3 ÷3 ÷3 ÷3

------------ ------------------

x > 2 x < -12

(-∞, -12), (2, ∞)

(-∞, -12) U (2, ∞)

I hope this helps!

You might be interested in

Pls help this is due really soon

lora16 [44]

Answer: I think that the answer is 100.

Step-by-step explanation: the line is straight and horizontal, and straight horizontal lines r 180 degrees, we already have 80 degrees so X is 100.

3 0

2 years ago

Read 2 more answers

I need help. 40x^6+16x^6

xxMikexx [17]

Answer:

56^6

Step-by-step explanation:

when they are the same exponent

you just add the coefficients

7 0

2 years ago

Read 2 more answers

Which expression can be used to find 3 x 2,354

Ann [662]

D.
Because if you break it down and split the digit place value you can start by doing 3×2000+300+50+4 is going to equal 7062 which is D.

6 0

2 years ago

HELPPP PLZZZZZ HURRY WILL MARK BRAINLEST

Aliun [14]

Answer:

3) 30 ft

4) 4.8 inches

6) Perimeter = 16 Area = 24

7) Perimeter = 28 Area = 32

8) Perimeter = 29 Area = around 50

6 0

3 years ago

The revenue for a company producing widgets is given by y = -20x2 - 50x + 200, where x is the price in dollars for each widget.

lisov135 [29]

Answer:

The price is x = $2.779

Step-by-step explanation:

From the question we are told that

The revenue is $y = - 20x^2 - 50 x + 200$

The cost of production is $y = 30 x - 10$

Generally at break even point the cost of production is equal to the revenue

$-20x^2 -50x + 200 = 30x-10$

=> $20x^2 +20 -210 = 0$

Using the quadratic formula to solve this equation we have that

x = $2.779

6 0

3 years ago

Read 2 more answers