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Paul [167]
2 years ago
12

Can someone please help me with this expanding brackets problem ? Quick ! I will give 20 points :)

Mathematics
1 answer:
eimsori [14]2 years ago
7 0

Step-by-step explanation:

(x + 1)(x - 6)(x + 7)

{x}^{2}  - 6x + x - 6(x + 7)

{x}^{3}  + 7x - 6 {x}^{2}  - 42x +  {x}^{2}  + 7x  - 42

{x}^{3}  - 5x {}^{2}  - 35x - 42

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Чу- 8х + 5x - Зу<br> OOoO
natulia [17]
Y-3x

Explanation: do 4y-3y which equals 1 which just equals Y. Then do -8x+5x which equals -3x
3 0
3 years ago
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The price of a DVD movie was reduced from $20 to $18. By what percentage was the price of the DVD movie reduced? *
Alla [95]

Answer:

A. 10%

Step-by-step explanation:

First calculate how much percentage is in one dollar, which is 5% per dollar, then times that by how much money is deducted which is $2, and you will get your answer 10%.

Hope this helps good luck!

6 0
2 years ago
Solve x - 6x = 40 by factoring. What is<br> the solution?
marta [7]

Answer:

x=-8

Step-by-step explanation:

collect like terms

-5x=40

divide both sides of the equation by -5

so the answer would be x=-8

7 0
3 years ago
PLS SOMEONE HELP ME ASAP
babymother [125]

Answer:

A. (2i)(8) = d. 16i

B. 16i³ = b. -16i

C. (2i)⁴ = a. 16

D. (2i)(8i) = c. -16

Step-by-step explanation:

A. Multiply 2i by 8 to get 16i, which corresponds to d.

B. The exponent is 3 more than a mulitple of 4 in 16i³, so the answer is negative. -16i corresponds to b.

C. (2i)⁴ has an exponent that is a multiple of 4, so the i isn't needed. 16 corresponds to a.

D. (2i)(8i) simplifies to 2(8) * i². The exponent is 2 more than a multiple of 4, so the answer is negative, without an i. -16 corresponds to c.

8 0
3 years ago
A flat rectangular piece of aluminum has a perimeter of 70 inches. The length is 11 inches longer than the width. Find the width
rodikova [14]

perimeter = 2L +2w

L = w+11

70 = 2(w+11) +2w

70 = 2w+22+2w

70= 4w + 22

48 = 4w

w=48/4 = 12

width = 12

length = 12+11 = 23

2x12 = 24

2x23 = 46

46+24 = 40

 length = 23 inches, width = 12 inches

Answer is D

5 0
3 years ago
Read 2 more answers
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