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Reil [10]
2 years ago
14

Please help and explain so I understand!!​

Mathematics
1 answer:
olga_2 [115]2 years ago
8 0

Answer:

x=5

Step-by-step explanation:

4x^2-11=89

add 11 to both sides

4x^2=100

Divide 4 on both sides

x^2=25

Take the square root of both sides to eliminate the power of two from x

\sqrt{x^2} =\sqrt{25}

Simplify

x=5

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25x2 + 16 – 40x – 64y
Sedaia [141]

Answer:

25x2 - 40x - 64y + 16

Step-by-step explanation:

Step  1  :

Equation at the end of step  1  :

 ((52x2 +  16) -  40x) -  64y

Step  2  :

Final result :

 25x2 - 40x - 64y + 16

Processing ends successfully

plz mark me as brainliest :)

5 0
3 years ago
Read 2 more answers
If a hand sanitizer cleans 99.9% of bacteria if u use it 2 times does that make it 100%
Viktor [21]

Answer:

It's true

Step-by-step explanation:

I hope it helps you

7 0
2 years ago
Simplify the following algebraic expression 2(x^2+3x)-10(x^2+2)
4vir4ik [10]

Answer:

-8x^2+6x-20

Step-by-step explanation:

2(x^2+3x)-10(x^2+2)

2x^2+6x-10x^2-20

(2x^2-10x^2)+6x-20

-8x^2+6x-20

6 0
3 years ago
P=<br><br> A. i <br> B. -1<br> C. -i <br> D. 1
Molodets [167]

Answer:

la respuesta es capó la B

Step-by-step explanation:

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7 0
2 years ago
Solve x2 + 2x = 4 for x by completing the square. x equals plus or minus square root of 5 plus 1 x equals plus or minus square r
steposvetlana [31]

Answer:

x equals plus or minus square root of 5 minus 1

Step-by-step explanation:

we have

x^{2} +2x=4

Divide by 2 the coefficient of the x-term

2/2=1

squared the number

1^2=1

Adds both sides

x^{2} +2x+1=4+1

x^{2} +2x+1=5

Rewrite as perfect squares

(x+1)^{2}=5

take the square root both sides

x+1=(+/-)\sqrt{5}

x=(+/-)\sqrt{5}-1

therefore

x equals plus or minus square root of 5 minus 1

4 0
3 years ago
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