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Vikentia [17]
3 years ago
10

Help me with this question plz thx!!​

Mathematics
1 answer:
Alborosie3 years ago
8 0

Answer:

9x² - 9y + 9

Step-by-step explanation:

Step 1: Write out expression

3 - 2y - 1 + 5x² - 7y + 7 + 4x²

Step 2: Combine like terms (x²)

9x² + 3 - 2y - 1 - 7y + 7

Step 3: Combine like terms (y)

9x² - 9y + 3 - 1 + 7

Step 4: Combine like terms (constants)

9x² - 9y + 9

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Evaluate the expression: 3a+4<br><br> a = 1.5<br><br> a = 1/3<br><br> a = 2
Nana76 [90]

Answer:

mathpapa.com

the place i got this from tbh i don't understand what you want for an answer but i tried, so here is a website that i got these from i hope it helps you.

Step-by-step explanation:

Evaluate for a= 1/3

3(1/3)+4(1/3) = 7/3

Evaluate for a= 1.5

(3)(1.5)+(4)(1.5)

=10.5

Evaluate for a=

(3)(2)+(4)(2)

=14

7 0
2 years ago
Out of 16 spins, a purple and red spinner landed on purple 9 times and on red 7 times. Based on the experimental probability, ho
Nikitich [7]

Answer:

Part A   Answer = A=28

Part B Answer is B = 9/16 + C =0.56

Step-by-step explanation:

1 = A. 28   This is because the percentage rate works out at 43.75%

2. 9/16 also, 0.56  This is because 9/16 has decimal 0.56 we can work this out by looking at the inverse of 1 ; 1= 16 16/9 = 1.77/3.17 which adds to 4.94 = 10 x 0.49  4 representing 4 from 20 =16 and 9 representing the proportion.

5 0
3 years ago
Factor. 2v^2-11v-63
Tatiana [17]

Answer:

  (2v +7)(v -9)

Step-by-step explanation:

Factors of 2·(-63) = -126 that have a sum of -11 are 7 and -18, so we can rewrite the middle term to -18v+7v. Then we can factor by grouping.

  2v^2 -18v +7v -63 = 2v(v -9) +7(v -9)

  = (2v +7)(v -9)

5 0
3 years ago
I need answers please.
Lena [83]

Answer:

1) 477.5

2) 395.8

3) 2042.0

4)132.7

5) 44.1

6) 437.9

Step-by-step explanation:

Surface area of a cylinder = 2(pi)(r)(h) + 2 (pi)(r)^2

Lateral area of a cylinder = 2 (pi)(r)(r)

7 0
3 years ago
Solve for n. 2/3(1 + n) = - 1/2n
alexandr1967 [171]

Answer:

⅔+⅔n=-½

6×⅔+6×⅔n=6×-½

2×2+2×2n=-3

4+4n=-3

4n=-3-4

4n=-7

n=-7/4

8 0
3 years ago
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