2 years ago

Evaluate 5x2−9 when x=−2

1 answer:

Elena-2011 [213]2 years ago

3 0

answer: 11

explanation: just plug in -2 for x. the new problem becomes 5(-2)^2 - 9. Negative two squared is 4. 5 times 4 is 20. 20 minus 9 is 11.

You might be interested in

Which statements are true regarding the sequence below? Check all that apply.

nignag [31]

Answer: A & C

i took the ed assignments

5 0

2 years ago

A cookie recipe uses V2 teaspoon of vanilla with 3/4 cups of flour. How

Licemer1 [7]

Answer:

3 cups of vanilla should be used with 5 cups of flour

Step-by-step explanation:

the ratio 1/2:3/4 is equivalent to 3:5

3 0

2 years ago

The Darnells are having a swimming pool installed. The pool has a radius of 14 feet and a height of 4 feet. What is the volume o

ella [17]

So a circular pool will be in the shape of a cylinder. and the formula for finding the area of a cylinder is $2 \pi r^{2} +2 \pi rh$ . r=radius, h=height. If we put the numbers into the equation it is $2 \pi 14^{2} +2 \pi 14(4).$ .14 squared is 196 and 4*14= 56. So our equation is now $2 \pi (196)+2 \pi (56)$ . 2*pi=6.28318530718 but let's round that to 6.283. So now our equation is much simpler 6.283(196)+6.283(56). Just multiply them. 1231.504+351.858= <span>1583.362</span> is your final answer.

8 0

2 years ago

Help me solve it and please go fast

MariettaO [177]

Answer:

x/3 -3= 18 (add three to both sides)

x/3= 21

x/3(*3) =21(*3) (multiply by 3 on each side to cancel out the division)

x= 63

63/3-3=18

21-3=18

18= 18 (checking answers)

Step-by-step explanation:

5 0

2 years ago

MZFEG=6x - 7 and mZFED=2x +41 , find the mZDEG

uranmaximum [27]

Answer:

this might be the answer

5 0

2 years ago