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AnnyKZ [126]
3 years ago
7

The difference between two numbers is 9. The first number plus twice the other number is 27. Find the two numbers.

Mathematics
1 answer:
Dovator [93]3 years ago
3 0

The two numbers are 15 and 6

<em><u>Solution:</u></em>

Let the two number be "a" and "b"

Let the first number be "a" and second number be "b"

Given that,

<em><u>The difference between two numbers is 9</u></em>

a - b = 9 -------- eqn 1

<em><u>The first number plus twice the other number is 27</u></em>

First number + twice the second number = 27

a + 2b = 27 ---------- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

From eqn 1,

a = 9 + b ------ eqn 3

<em><u>Substitute eqn 3 in eqn 2</u></em>

9 + b + 2b = 27

3b = 27 - 9

3b = 18

Divide both sides of equation by 3

<h3>b = 6</h3>

<em><u>Substitute b = 6 in eqn 3</u></em>

a = 9 + 6

<h3>a = 15</h3>

Thus the two numbers are 15 and 6

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Answer:

The total cost for 8 skiers=316 dollars

Step-by-step explanation:

Given that the expression 15n+12n+100 represents the total cost in dollars for skis,boots and a lesson for n skiers.

To simplify the given expression :

15n+12n+100=27n+100

27n=-100

Therefore n=\frac{-100}{27}

Now to find the total cost for 8 skiers.

The total cost for 8 skiers can be written as below

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Answer:

The height from ground, at which Jeb needs to hit the ball is 7.8 meters

Step-by-step explanation:

The given parameters are;

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