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IgorC [24]
2 years ago
11

What is the answer of: (10+2b)^2

Mathematics
1 answer:
scZoUnD [109]2 years ago
5 0

Answer:

10^2+2×2b×10+2b^2 = 100+40b+2b^2

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(A)+(B)=8 I need help for this question please, and thanks. :) 10 pts!!
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You haven't included enough information for the question, but assuming that a and b are the same then a is 4 and b is 4
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3 years ago
Factor 6y^2(y^2+6y+9) completely.
natali 33 [55]

6y^2(y^2+6y+9)\\\\=6y^2(y^2+2\cdot 3 \cdot y   + 3^2)\\\\=6y^2(y+3)^2\\\\=6y^2(y+3)(y+3)

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2 years ago
Zack has a car. He wants to sell it for 60% off the current price.the market price is $500. How much money would he receive in e
Mariana [72]
Since Zack wants to sell his car for 60% off the current price of $500, he has to multiply 0.60 (60% in decimal form) by $500, which equals $300. Now, the next step is very important. He has to subtract $500 from $300 since $300 is the amount OFF. Once he does that, he will get $200.

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8 0
3 years ago
Use completing the aquare to solve for x in the equation (x+7)(x-9)=25​
Tema [17]

Answer:

x = 1 + sqrt(89) or x = 1 - sqrt(89)

Step-by-step explanation:

Solve for x:

(x - 9) (x + 7) = 25

Expand out terms of the left hand side:

x^2 - 2 x - 63 = 25

Add 63 to both sides:

x^2 - 2 x = 88

Add 1 to both sides:

x^2 - 2 x + 1 = 89

Write the left hand side as a square:

(x - 1)^2 = 89

Take the square root of both sides:

x - 1 = sqrt(89) or x - 1 = -sqrt(89)

Add 1 to both sides:

x = 1 + sqrt(89) or x - 1 = -sqrt(89)

Add 1 to both sides:

Answer: x = 1 + sqrt(89) or x = 1 - sqrt(89)

7 0
3 years ago
A searchlight rotates through one complete revolution every 4 seconds. How long does it take the light to rotate through 90 degr
frez [133]
1 full revolution=360
4seconds=360degrees
how many seconds is 90 degrees
4:360=x:90
4/360=x/90
simpllfiy
1/90=x/90
1=x

answer is 1 second
6 0
2 years ago
Read 2 more answers
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