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zhannawk [14.2K]
3 years ago
6

Evaluate -5x2 − 8x + 1 when x = -3.

Mathematics
1 answer:
Dafna11 [192]3 years ago
5 0

Answer:

13

Step-by-step explanation:

-5 x 2 - 8x + 1

= -5 x 2 - 8(3) + 1

= -10 - (-23)

= 13

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find three consecutive integers for which 3 times the sum of the first and third integers is -342? show step by step
Artyom0805 [142]

Answer:

-58, -57, -56

Step-by-step explanation:

if the first integer is x,

the second integer must be x + 1 (because it's consecutive)

and the third must be x + 2

Therefore:

3 times the sum of the first and third integers is -342:

3 * (x + (x+2) ) = -342

Combine like terms in parentheses

3 * (2x + 2) = -342

Distribute the 3 to the 2x and the 2:

6x + 6 = -342

Subtract 6 on both sides

6x = -348

Divide by 6 on both sides

x = -58

x + 1 = -57

x + 2 = -56

-58, -57, -56

Check:

3 * (-58 + -56) = 3 * -114 = -342

3 0
3 years ago
Which of the following word problems can be solved using the equation 12 ÷ 4 = a?
Sever21 [200]

Answer:

A.

Step-by-step explanation:

A) 12 is divided by 4 since the twelve cookies are shared equally between four children.

B) 12 is multiplied by 4 since each band uniform has 12 buttons and there are four band uniforms.

C) 12 is substracted by 4 since four boats will not participate in the race out of a total of 12 boats.

D) 4 is added to 12 since there are already 12 monkeys but now 4 more will arrive.

7 0
3 years ago
Read 2 more answers
Which of these graphs represents the inequality x > 5?
nadezda [96]

Answer:

A is correct.

x>5 means all numbers greater than BUT not equal to 5.

The open circle means "not equal".

So,  A is correct.

Hope this helps!

7 0
3 years ago
Read 2 more answers
What is 20 over 24 in a percent
Gala2k [10]

\frac{20}{24}


If you want to find the answer just divide the 20 by the 24, then multiply by 100 to get your percentage.

20 ÷ 24 = 0.83

0.83 × 100 = 83%

↑   ↑   ↑  Hope this helps! :D

7 0
3 years ago
The queen marys 2’d height above water is about the same as a 14 story building, what is the queen mary twos height above water,
Alex_Xolod [135]

Answer: Length 1,132 ft

Step-by-step explanation: Im not sure if this is the one your talking about but here.

3 0
3 years ago
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