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3 years ago

The sum of 5 times a number and 2 is equal to 4 times the number

Mathematics

1 answer:

Verdich [7]3 years ago

8 0

5x +2 =4x

subtract 2 from each side

5x= 4x-2

subtract 4x from each side

x = -2

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How long does a car traveling at 70 mph take to travel 88 miles, in hours

dybincka [34]

So,

Obviously, the car will travel 70 miles in one hour. So after one hour, the car will have traveled 70 miles. That leaves 18 miles.

The time it will take for the car to go another 18 miles will be 18 divided by 70.
$\frac{18}{70}$

Simplify.
$\frac{2*3*3}{2*5*7}$
$\frac{3*3}{5*7}$
$\frac{9}{35}$

Divide.
≈ 0.25714

So a car traveling at 70 mph will take approximately 1.25714 hours or 1.26 hours to travel 88 miles.

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3 years ago

Show all steps to find the product of -3x^3 + 2x - 4 and x^3 + x - 2.

Lana71 [14]

Answer:

-3x^6 -x^4 +2x^3 -8x +8

Step-by-step explanation:

Use the distributive property 4 times.

(-3x^3 + 2x - 4)×(x^3 + x - 2)

= -3x^3(x^3 +x -2) +2x(x^3 +x -2) -4(x^3 +x -2) . . . . once

= -3x^6 -3x^4 +6x^3 +2x^4 +2x^2 -4x -4x^3 -4x +8 . . . . 3 more times

= -3x^6 +x^4(-3+2) +x^3(6 -4) +2x^2 +x(-4 -4) +8 . . . . group like terms

= -3x^6 -x^4 +2x^3 -8x +8

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3 years ago

Samantha types 40 words per minute. How many words can Samantha type in 8 minutes?

Ne4ueva [31]

Answer:

C. 320 (correct)

Step-by-step explanation:

If Samantha can type 40 words per minute, to find the number of words Samantha can type in 8 minutes, multiply 40 by 8.

40×8=320

Therefore, Samantha can type 320 words in 8 minutes.

I hope this helps!

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allsm [11]

Answer:

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Step-by-step explanation:

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3 years ago

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Nataly_w [17]

1,507.125 square inches. Yes I did just answer this again.

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3 years ago