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xenn [34]
3 years ago
15

Y=2x and 5x-y=9 substitution

Mathematics
2 answers:
grandymaker [24]3 years ago
7 0
1. Substitute 2x for y: 5x-2x=9
2. Combine like terms: 3x=9
3. Divide each side by 3: x=3
Naily [24]3 years ago
6 0

Answer:

3,6

Step-by-step explanation:

Plug 2x(y) into 5x -y = 9

5x -2x = 9

Add like terms.

3x = 9

Divide both sides by 3.

x = 3

Now, in order to find y, plug 3(x) into y = 2x

y = 2(3)

y = 6

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Last year the robotics club had 30 members. This year the club has 24 members. Find the percent change in the number of members.
Naddika [18.5K]

Answer:

the answer is .6

Step-by-step explanation:

so 30 minus 24 is 6 turn 6 into percentage which is 0.6

4 0
3 years ago
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3. A soccer team played 160 games and won 65 percent of them. How many games did the team win?
Airida [17]

Answer:

b.) 104

Step-by-step explanation:

Percent formula:

x/y = p/100

where x is the fraction, y is the total, and p is the percent

This means:

x = number of games the team won

y = total number of games

p = percent the number of teams won

Let's plug these values into the equation:

x/y = p/100

x/160 = 65/100

Solve by cross-multiplying:

x/160 = 65/100

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100x = 10,400

/100     /100

x = 104

Therefore, the team won 104 games.

6 0
3 years ago
Justin used 3/4 of a gallon of paint on 3/4 of a wall. How many gallons does he need for one wall?
blondinia [14]

Answer:

Step-by-step explanation:

1/4

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What is the product of 3 1/5 and 5/8. Use complete sentences in your answer.
vesna_86 [32]
The product of 3 1/5 and 5/8 is 2.
5 0
3 years ago
someone what is the answer to this. I got it wrong and what to do what the answer really is and please be 100 sure with your ans
zubka84 [21]
That would be 12<x
Its not 12 > x because that means that 12 is greater than x which is the same thing as x < 12.
Hope it helps
6 0
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