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myrzilka [38]
3 years ago
6

Write an expression to represent: The sum of four and the product of three and a number x xx.

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
8 0

Answer:

4+3x

It's pretty straight forward, you have the number 4 that is added to the rest of the expression because sum is addition, and the product of 2 numbers is multiplication so it would make 3(x) or 3x, which results in 4+3x.

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#3

Step-by-step explanation:

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Is anyone good at this? Please help me!!
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It is a 375-mile drive from San Francisco to Los Angeles. A map scale shows 2 centimeters equaling 10 actual miles. How long is
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An actor invests some money at 9​% simple​ interest, and ​$24,000 more than three times the amount at 10​% simple interest. The
Andrew [12]

Answer:

The amount invested at 9% is $93000

The amount invested at 10% is $303000

Step-by-step explanation:

Let the amount invested at 9% interest rate be x

And the amount invested at 10% rate be y

Simple Interest from x in a year = 0.09x

Simple Interest from y in a year = 0.1y

But y = 24000 + 3x

And the sun of the interests, 0.09x + 0.1y = 38670

Now we have a simultaneous eqn

y = 24000 + 3x (eqn 1)

0.09x + 0.1y = 38670 (eqn)

Substitute y into eqn 2

0.09x + 0.1(24000 + 3x) = 38670

0.09x + 2400 + 0.3x = 38670

0.39x = 38670 - 2400

x = 36270/0.39 = $93000

y = 24000 + 3x = 24000 + 3 × 93000 = $303000

8 0
3 years ago
Justin wants his new treehouse to blend in with the leaves, so he decides to paint it green. He mixes some white paint and green
spayn [35]

Answer:

  • C. neither. the roof and walls are the same shade of green

Step-by-step explanation:

<u>The first batch:</u>

  • Some white and some green

<u>The second batch:</u>

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As we see the ratio of white to green has not changed

Therefore there won't be any difference in painting

Correct answer choice is C.

8 0
3 years ago
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