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algol13
2 years ago
13

Andrea doubles as a professional pianist and a dedicated mother. She modeled a few relationships.

Mathematics
1 answer:
kotykmax [81]2 years ago
5 0

Answer:

S(B(r))

Step-by-step explanation:

B = sleep hour

S = practice hour

S(B(r))

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On her way to visit her parents,Jennifer drives 265 miles in 5 hours.What is her average rate of speed in miles per hour ?
aleksandrvk [35]

Answer: The average rate of speed in miles per hour that Jennifer was going is 53 miles per hour. 265/5=53



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4 years ago
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riadik2000 [5.3K]

Answer:

x=20; y=50 or (20, 50)

Step-by-step explanation:

Substitution means plugging in one variable's value that consists of the opposite variable. Because y=3x-10 is already specified, you can plug it into the second equation's y value. After doing that, it looks like this:

-4x+2y=20→-4x+2(3x-10)=20

Then you would distribute the 3 across the parentheses next to it, like this:

-4x+2(3x-10)=20→-4x+6x-20=20

Then, add like terms, like this:

-4x+6x-20=20→2x=40

Then divide both side by 2 to isolate x.

x=20

Now, you can plug 20 (x) into either equation, but the first one seems simpler so you would pick that. It would look like this:

y=3x-10→y=3(20)-10

Solving would look like this:

y=3(20)-10→y=60-10→y=50

So the answer is x=20; y=50 or (20, 50).

6 0
3 years ago
Read 2 more answers
The differnce between a number divide by 3 and 4 is 20
Talja [164]

Answer:

(n/3)/4 =20

Step-by-step explanation:

i think this is what your looking for if not im sorry

have a blessed day :)

3 0
3 years ago
To go to dance class at 6:45p.m. bus,Kelly needs 35 minutes to walk home from a friend's house,30 minutes for dinner,and 20 minu
GREYUIT [131]
20+35+30= 1 hr&25 min so she should leave at 5:20
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3 years ago
If you traveled in space at a speed of 1000 miles per hour, how far would you travel in 7.5 x 10^5 hours? Write your answer in s
Lynna [10]
Basically, every zero a number has to the end, the higher the scientific notation will be. Because 1000 has three zeroes, 10^5 will go to 10^8. So, you will travel 7.5 x 10^8 miles. 
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4 years ago
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