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zmey [24]
3 years ago
6

Kelly is 8 years younger than her sister. The sum of her age is 44 years. How old is jelly and how old is her sister?

Mathematics
1 answer:
Vladimir [108]3 years ago
3 0

Answer:

Kelly: 4

Sister: 12

Step-by-step explanation:

x=kelly's age

y=sister's age

x+y=44

x=y-8

(y-8)+y=44

2y-8=44

2y=36

y=12

x=12-8

x=4

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2 years ago
Grace and her brother Sid want to raise money to go to band camp. Their parents have agreed to help them earn up to $400 by payi
LenKa [72]

Answer:

25m + 10b = 400

Step-by-step explanation:

Total amount that can be earned = $ 400

Amount earned on mowing a lawn = $ 25

Amount earned per hour on babysitting = $10

Amount earned for mowing one lawn is $ 25, so amount earned for mowing m lawns will be $ 25m

Amount earned for one hour of babysitting is $ 10, so amount earned for babysitting for b hours will be $ 10b

Total amount earned = Amount earned from mowing m lawns + Amount earned from babysitting for b hours

Using the values from above, we can set up the equation as:

400 = 25m + 10b

or

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This equation represents the number of lawns they can mow, m, and hours they can babysit, b, to earn $400.

3 0
3 years ago
F(x)=3 over x+2-x-3 squared what is f(7)
dimaraw [331]

<u>Answer:</u>

f(7)=\frac{-5}{3} or f(7)=-1.67

<u>Step-by-step explanation:</u>

We are given the following function of x and we are to find the value of f ( 7 ):

f ( x ) = \frac { 3 } { x + 2 } - \sqrt { x - 3 }

Substituting the given value (7) in the above function to get:

f(x)=\frac{3}{x+2}-\sqrt{x-3}

f ( 7 )= \ frac{3}{7+2}-\sqrt{7-3}

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7 0
3 years ago
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Sergeeva-Olga [200]

Answer:

\sqrt{5}

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3 0
3 years ago
Select the correct answer.
emmasim [6.3K]

Answer:

the answer is 45/8 very direct

4 0
3 years ago
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