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3 years ago

I need help with this

Mathematics

2 answers:

evablogger [386]3 years ago

5 0

Answer:

this

Step-by-step explanation:

Product Rule of Exponents aman = am + n

When multiplying exponential expressions that have the same base, add the exponents.

Example:

Multiply: 4x3 · −6x2

Solution:

Multiply coefficients: 4 · −6 = −24

Use the product rule to multiply variables : x3 · x2 = x3 + 2 = x5

4x3 · −6x2 = −24x5

Pie3 years ago

5 0

Answer:

this simply means that when multiplying indices the exponents must be added and the whole numbers will be multiplied in the normal way

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A building is 24 feet tall and 40 feet wide. If a scale model of this building is 10 inches wide, how tall is the model?

kow [346]

Answer:

The model is 6 inches tall.

Step-by-step explanation:

Write and solve an equation of ratios:

10 in. x

--------- = ----------

40 ft. 24 ft.

Cross-multiplication yields:

240 in = 40x, so x = 6 inches.

The model is 6 inches tall.

4 0

3 years ago

a student estimated a mass to be 250g but upon carefully measuring it found the actual mass to be 240g. what is the percent erro

AURORKA [14]

Okay make an proportion: 240 x ____=________ 250 100 Now do 240×100=24000 24000÷250= 96 100-96=4 So 4%

8 0

3 years ago

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Fifteen years later, a man will be two times as old as he was 15 years ago. How old is he now?

Inga [223]

Answer:

Let the present age of the man be x years.

Age of the man 15 years ago =(x−15) years and

Age of the man 15 years later =(x+15) years

According to the given condition, we have

(x+15)=2(x−15)

⇒x+15=2x−30

⇒x−2x=−30−15

⇒−x=−45 or x=45 years

Hence, the present age of the man is 45 years.

Step-by-step explanation:

Hope it helps you..

Your welcome in advance..

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6 0

3 years ago

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Angle 2 and angle 6 are blank angles

Katyanochek1 [597]

Answer:

A correspoding

Step-by-step explanation:

8 0

4 years ago

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PLEASE HELP!!!<br> Equations Sort and Equivalent Expressions

Alex73 [517]

Answer:

Step-by-step explanation:

Math Matching games:

5(5x + 2)

5(5x) + 5(2)

25x + 10 <== answer

2(x + 4)

2(x) + 2(4)

2x + 8 <== answer

3(4x - 9)

3(4x) - 3(9)

12x - 27 <== answer

7(2x + 3)

7(2x) + 7(3)

14x + 21 <== answer

4(3x - 5)

4(3x) - 4(5)

12x - 20 <== answer

6(5x + 1)

6(5x) + 6(1)

30x + 6 <== answer

8(x - 5)

8(x) - 8(5)

8x - 40 <== answer

5(4x - 3)

5(4x) - 5(3)

20x - 15 <== answer

2(2x + 7)

2(2x) + 2(7)

4x + 14 <== answer

3(3x + 3)

3(3x) + 3(3)

9x + 9 <== answer

7(5x - 2)

7(5x) - 7(2)

35x - 14 <== answer

4(x - 8)

4(x) - 4(8)

4x - 32 <== answer

True or false Part 1:

A. 3x + 3 = 3(x + 1) <== true

B. 2x + 2x + 4 = 8x <== false

C. 3x + 3 = 2x + x + 3 <== true

D. 2x + 2x + 4 = 2(x + 1) <== false

E. 5x + 6 = 3x + 3x <== false

F. 3x + 3 = 3(x + 3) <== false

G. 2x + 2x + 4 = 4(x + 1) <== true

H. 4x + 3 = 3x + 4 <== false

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

True or false Part 2:

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

O. $x^2+3x=3x+x^2\ < ==\ true$

P. $2x^2+3=2+x^2+x^2+1\ < ==\ true$

Hope this helps!

4 0

2 years ago

I need help with this ​

I need help with this