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Bad White [126]
3 years ago
13

Simplify the expression: 3(2x2 + 7x + 4) - 8x2 + 15

Mathematics
1 answer:
Softa [21]3 years ago
5 0

Answer:

-2x² + 21x + 27

Step-by-step explanation:

distribute 3 to get:

(6x² + 21x + 12) - 8x² + 15

combine 'like terms' to get:

-2x² + 21x + 27

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Identify the sequence as arithmetic, geometric, or neither <br> 0,1,1,2,3,5,6,13
Makovka662 [10]

Answer:

neither

Step-by-step explanation:

there is no constant progression or degression

5 0
3 years ago
Kyle goes to the movies with his friends. Each person buys a ticket and two equally priced snacks at the snack bar. Let ticket p
AlekseyPX

Answer:

your answer is A

Step-by-step explanation:

please let me know of im incorrect

8 0
2 years ago
Read 2 more answers
Which of these four sets of side lengths will form a right triangle?
mel-nik [20]

Answer:

Set 1    Yes

Set 2    No

Set 3 and Set 4   ???

Step-by-step explanation:

Use the converse of the Pythagorean theorem.   Square the lengths and see if 2 results add up to the third result.

So, Set 1

10^{2} = 100     \\26^{2}  = 676\\24^{2}  = 576       100 + 576 = 676  Therefore we have a right triangle

Set 2

4^{2}  = 16\\2^{2}  = 4\\6^{2}   = 36

16 + 4 ≠  36   Therefore we do NOT have a right triangle

I will let you do Set 3 and Set 4.  OK?

6 0
3 years ago
Read 2 more answers
A rectangular street sign has an area of 40 square inches and a perimeter of 28 inches. What are the dimensions of the sign?
Usimov [2.4K]

Answer: 4 inches by 10 inches

Step-by-step explanation:

The area of a rectangle can be written as b*h, while perimeter is equal to (2b +2h).

A = b*h = 40

P = 2b + 2h = 28

P = 2b + 2h

28 = 2b + 2h

28 = 2(b+h)

14 = b + h

What two numbers add to 14 and multiply to 40?

4 * 10 = 40

4 + 10 = 14

8 0
3 years ago
Read 2 more answers
The variable Z is directly proportional to X. When X is 3, Z has the value 54. Wha is the value of Z when X= 12
RSB [31]
The variable Z is directly proportional to X
Z = kX (Where k is the constant of proportionality)
To find k
54 = k3
 
k = 54/3
k = 18
 

now find new Z


 Z = 18X
Z = 18(12)
Z = 216

5 0
3 years ago
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