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Luden [163]
3 years ago
8

NEED THIS ASAP Simplify 3^2 ⋅ 3^5. A) 3^7 B)3^10 C)9^7 D)9^10

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
8 0

Use\ a^n\cdot a^m=a^{n+m}\\\\3^2\cdot3^5=3^{2+5}=3^7\to\boxed{A)}

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Rewrite the equation by completing the square. 4 x^{2} +20x +25 =0
Ede4ka [16]

Answer:

(x+5/2)^2 = 0

Step-by-step explanation:

4 x^{2} +20x +25 =0

Divide by 4

4/4 x^{2} +20/4x +25/4 =0

x^2 +5x +25/4 =0

Subtract 25/4 from each side

x^2 +5x +25/4 -25/4 =-25/4

x^2 +5x  =-25/4

Take the coefficent of x

5

Divide by 2

5/2

Square it

25/4

Add it to each side

x^2 +5x +25/4 =-25/4+25/4

(x+5/2)^2 = 0

Take the square root of each side

x+5/2 = 0

x = -5/2

8 0
3 years ago
Read 2 more answers
31,50 is 42% os what number
sergeinik [125]
\frac{31,50}{x}=\frac{42}{100}

The right fraction represents the percentage; 42 over 100 (100 is the total), or 0.42.
The left fraction is the part number over the whole number. The whole number is unknown, so we use 'x'.


\frac{31.50}{x} = \frac{42}{100}\\\\cross\ multiply\\\\31.50\times100=3150\\42\times x=42x\\\\3150=42x\\x=75
Your answer is 75.

3 0
3 years ago
~ BRAINLIEST ~ ~ BRAINLIEST ~ ~ BRAINLIEST ~ ~ BRAINLIEST ~
Mademuasel [1]

Answer:

13 is the answer ok I know but cheating in exam is bad

5 0
3 years ago
Read 2 more answers
HELP PLEASE ASAP! Tell how you found 2k + 10! 20 points!
Ivan

Answer:

2(k+5)

Step-by-step explanation:

Factor 2k+10

2k+10

=2(k+5)

Answer:

2(k+5)

8 0
3 years ago
How much more is five ninth’s greater than 4 fifteenths
andrey2020 [161]
The answer is 3.46154
8 0
3 years ago
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