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QveST [7]
3 years ago
11

Help it’s URGENT!!!!!

Mathematics
1 answer:
umka21 [38]3 years ago
4 0

n=number of hours

inequality = 3n+10=40

Solution = n = 10. So 10 hours.

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phillip bought 12 used cds and dvds.cds cost $2 each,and dvds cost $3 each.he spent $31,not including tax.how many dvds did phil
inessss [21]
Let c and d be the number of cds and dvds respectively.

c+d=12

c=12-d

The we are told that:

2c+3d=31, using c found above in this equation gives you:

2(12-d)+3d=31

24-2d+3d=31  

24+d=31

d=7

So Phillip bought 7 dvds.

check...

3*7+2(12-7)=31

21+2(5)=31

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31=31
8 0
3 years ago
At what rate is a car traveling, if it goes 157.5 miles in 2.5 hours?
Finger [1]

divide total miles by time:

157.5 / 2.5 = 63 miles per hour

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3 years ago
Sara's new car depreciates 8% each year. Write an exponential function to model the depreciation each month. Write an exponentia
Alinara [238K]

Answer:

y= $(1-0.08)y

Step-by-step explanation:

3 0
2 years ago
Does the graph represent a function?
stiv31 [10]
No it does not. Any function that has any of the same X vaules (The line going up left to right) is not a function.
6 0
3 years ago
Read 2 more answers
Hi! I’m stuck on this problem on math! This is 5th grade math. Can anyone help me?
emmasim [6.3K]

Answer:

The answer is 4.2 kilograms of dog food

Step-by-step explanation:

it says that ray feeds his dog 0.12 kilogram of food each day

he needs for 1 month

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since 1 day food is 0.12 kilograms you'll have to multiply 0.12 with 1 month

i.e; 0.12*31 or 0.12*30

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since we don't have an option we'll have to choose something bigger than this

therefore, the answer is 4.2

7 0
3 years ago
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