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agasfer [191]
3 years ago
11

Simplify -5(3m2 + 7n2) + 8n2

Mathematics
2 answers:
Blababa [14]3 years ago
6 0

Answer:

\boxed{\red{=  - 3(5 {m}^{2}   + 9 {n}^{2} )}}

Step-by-step explanation:

- 5(3 {m}^{2}  + 7 {n}^{2} ) + 8 {n}^{2}  \\  - 15 {m}^{2}  - 35 {n}^{2}  + 8 {n}^{2}  \\  =  - 15 {m}^{2}  - 27 {n}^{2}  \\  =  - 3(5 {m}^{2}   + 9 {n}^{2} )

son4ous [18]3 years ago
5 0

Answer:

<h3>-15m² - 27n²</h3>

Step-by-step explanation:

-5(3m² + 7n²) + 8n²

Expand brackets.

-15m² + -35n² + 8n²

Combine like terms.

-15m² + -27n²

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Answer:

C. $59.95

Step-by-step explanation:

8 0
3 years ago
What are the factors of 2x2 + 3x – 54? Select two options. 2x – 9 2x – 6 2x + 6 x – 6 x + 6
andrew-mc [135]

Answer:

2x − 9 and x + 6

Step-by-step explanation:

2x² + 3x − 54

Factor using the AC method.

2 × -54 = -108

Factors of -108 that add up to 3 are +12 and -9.

Divide by 2 and reduce: 12/2 = 6/1, -9/2 = -9/2.

Therefore, the factors are x + 6 and 2x − 9.

8 0
3 years ago
Multiply<br><br> 5( 4n -5)<br> tell me how
rewona [7]

Distribute

5 × 4n + 5 × -5

Simplify 5 × 4n to 20n

20n + 5 × -5

Simplify 5 × -5 to -25

<u>20n - 25</u>

8 0
3 years ago
Alex made 36 cookies. 1/4 of the cookies were chocolate chip. 1/3 of the cookies were oatmeal. The rest of the cookies were pean
MatroZZZ [7]

Answer:

5

Step-by-step explanation:

number of chocolate chip cookies = 36 × ¼ = 9

number of oatmeal cookies = 36 × ⅓ = 12

36 - 9 - 12 = 15

Alex made 15 peanut butter cookies.

7 0
3 years ago
The table shows the proportional relationship between the time in hours (h) Sara babysits and the amount in dollars (a) Sara ear
USPshnik [31]

Answer:

C

Step-by-step explanation:

The table shows that Sara earns 4 dollars per hour. The equation shows that Abbey earns 5 dollars per hour.

I hope that helps. If there are any questions left, just comment:)

Please mark me brainliest (it gets you 10 points back btw)

3 0
3 years ago
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