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murzikaleks [220]
4 years ago
8

Evaluate 4(3h + 7) ————— for h = -2 4 +h

Mathematics
1 answer:
Juliette [100K]4 years ago
3 0

If i understood the question right, you're trying to find the value when h = -2. If that's true so here is how it's done:

4(3h + 7)\\4(3(-2) + 7)\\4(-6+7)\\4(1)\\=4

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ser-zykov [4K]
What are you talking about if you have a question ask me
4 0
3 years ago
a boat traveled 160 miles downstream and back. the trip downstream took 8 hours. the trip back took 40 hours. find the speed of
Nana76 [90]

Let speed of the boat in still water = x miles per hour

Let speed of the current = y miles per hour


When water and current both flow in same direction then effective speed will be sum of both speeds that is (x+y)


now plug the given values in formula speed=distance/time

we get equation:

(x+y)=160/8

or x+y=20...(i)


When water and current both flow in opposite direction then effective speed will be difference of both speeds that is (x-y)

now plug the given values in formula speed=distance/time

we get equation:

(x-y)=160/40

or x-y=4

or x=4+y...(ii)


plug value of x into (i)

4+y+y=20

4+2y=20

2y=16

y=8


plug value of y into (ii)

x=4+8=12


Hence final answer is given by:

Speed of the boat in still water = 12 miles per hour

Speed of the current = 8 miles per hour


4 0
3 years ago
In algebra, we often study relationships where a change to one variable causes change in another variable. Describe a situation
dexar [7]

Answer:

The amount of firewood we use gives us a handful of ash. SO, on the x axes would we the amount of firewood and on the y axis it would be the amount of ash that was concluded.

Step-by-step explanation:

I have this q rn. And this is what im using. hope this helps!

4 0
2 years ago
(Please help. I screenshot the question and choices D: )
vodka [1.7K]
The answer is yes, 1:8
8 0
3 years ago
Read 2 more answers
A used car dealership buys a car for $2800 and then sells it for $4500 what is the percent increase?
Murljashka [212]
Alright, so we have the difference = 4500-2800=1700. To find the percent increase, we do 1700/2800=around 0.61 = around 61% percent
3 0
3 years ago
Read 2 more answers
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