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vladimir1956 [14]
4 years ago
7

Evaluate −2x2−4x+3 when x=−2

Mathematics
1 answer:
VMariaS [17]4 years ago
4 0

Answer: 3

Step-by-step explanation:

Evaluate is a fancy word for putting the value assigned into the equation and see what result you get.

-2x^2-4x+3\\x=-2

-2(-2)^2-4(-2)+3\\-2(4)+8+3\\-8+8+3\\3

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You are saving for a new computer monitor. You already have $75. The monitor costs a total of $400. You save $25 each week.
ZanzabumX [31]

Answer:

13 weeks

Step-by-step explanation:

1. $400-$75= 325

2. 25w=325 (because you save $25 a week)

3. w=325/25

4. w= 13 (325 divided by 25 is 13)

4 0
3 years ago
Complete the proof. If 7+5x+9=−3x , then x=−2 .
sashaice [31]

Answer:

7+5x+9=−3x

7+5(-2)+9=−3(-2)

7+-10+9=6

-3+9=6

6=6

Step-by-step explanation:

7+5x+9=−3x

7+5(-2)+9=−3(-2)

7+-10+9=6

-3+9=6

6=6

5 0
4 years ago
Duane bought 3.8 pounds of bananas for $.55 per pound.<br> How much did he spend in dollars?
mihalych1998 [28]

Answer:

$2.09

Step-by-step explanation:

3.8 x .55 = 2.09

8 0
3 years ago
IF YOU KNKW ABOUT THIS PLEASE HELP .... What is the volume of the cone shown below?
bazaltina [42]

Answer:

A. 300π units³

Step-by-step explanation:

Formula for volume of a cone = ⅓πr²h

Where,

radius (r) = ½(10) = 5 units

height (h) = 36 units

Plug in the values and find the volume in terms of π

Volume of the cone = ⅓*π*5²*36

Volume of the cone = 300π units³

6 0
3 years ago
Which of the following has a denominator of 6? <br>a. 6 2/3<br>b. 16/18 <br>c. 6/7 <br>d. 1/6
maw [93]

Answer:

D

Step-by-step explanation:

The denominator is the bottom number in a fraction, while the numerator is the top number.

numerator/denominator

Let's analyze the answer choices.

A. 6 2/3

The bottom number of the fraction is a 3, so this cannot be correct.

B. 16/18

The denominator here is 18, so this choice is also incorrect.

C. 6/7

In this fraction the numerator is a 6, but the denominator is a 7, so this choice is also wrong.

D. 1/6

This choice is the correct answer. The denominator, or bottom number is a 6.

The answer is D. 1/6.

8 0
3 years ago
Read 2 more answers
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