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ra1l [238]
3 years ago
14

Solve systems by substitutions y=x + 10 y= -6x-18

Mathematics
1 answer:
lbvjy [14]3 years ago
8 0

x + 10 = - 6x - 18

7x = - 28

x = - 4

and y = - 4 + 10 = - 6

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The area of a square is 36cm2. What are the dimensions of the square? You must show your work.
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Answer:18

Step-by-step explanation:

because 36 is divided by 2 equals 18cm

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Roy had a part time job he is paid £9.10 per hour. last week he worked for 10 1/2 hours
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(-x^2-x)+(6x^2+6x-7)=
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Answer:

5x² + 5x - 7

Step-by-step explanation:

Step 1: Write equation

(-x² - x) + (6x² + 6x - 7)

Step 2: Combine like terms (x²)

5x² - x + 6x - 7

Step 3: Combine like terms (x)

5x² + 5x - 7

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4 0
3 years ago
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JJill begins the summer with $500 in her savings account. Each week, she withdraws $20. Her brother, Sam,starts the summer with
meriva

Answer:

7th week

Step-by-step explanation:

Let us represent the number of weeks as x

Jill begins the summer with $500 in her savings account. Each week, she withdraws $20.

$500 - $20× x

500 - 20x

Her brother, Sam,starts the summer with $150 in his account. He adds $30 to his account each week.

$150 + $30 × x

150 + 30x

At what week will both Jill and Sam have the same amount in their account?

We solve this be Equating both Equations together

Jill = Sam

500 - 20x = 150 + 30x

Collect like terms

500 - 150 = 30x + 20x

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Divide both sides by 50

50x/50 = 350/50

x = 7 weeks

Therefore, at the 7 week, Jill and sam would have the same amount in their accounts

3 0
3 years ago
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