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notsponge [240]
3 years ago
8

Sarah drove 40 miles per hour. In 3 hours, Sarah drove 120 miles. Which is a valid proportion to represent the problem?

Mathematics
2 answers:
olga55 [171]3 years ago
6 0
D=rt       120=40mph*3hours
prohojiy [21]3 years ago
5 0

Answer:

This proportion is valid to represent the problem \frac{miles}{hours} = \frac{40}{1}=\frac{120}{3}

Step-by-step explanation:

A proportion is simply a statement that two ratios are equal.

With the data provided for the problem you can say that \frac{40}{1}=\frac{120}{3} this proportion is read as "forty miles is to 1 hour as one hundred twenty miles is to three hours."

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(16 - 6) + f - 9 = 12
CaHeK987 [17]

Answer:

f = 11

Step-by-step explanation:

6 0
3 years ago
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Solve each system using substitutions<br> Y+4=x<br> -2+ Y=8
klemol [59]
-2 + Y = 8
Y = 10
Plug in Y to the first equation, 10 + 4 = X
X = 14
3 0
3 years ago
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Please help! 20 points!!!
KonstantinChe [14]

Answer:

SOLUTION STEPS

6  

8

5

​

+−6  

3

1

​

 

Multiply 6 and 8 to get 48.

8

48+5

​

−  

3

6×3+1

​

 

Add 48 and 5 to get 53.

8

53

​

−  

3

6×3+1

​

 

Multiply 6 and 3 to get 18.

8

53

​

−  

3

18+1

​

 

Add 18 and 1 to get 19.

8

53

​

−  

3

19

​

 

Least common multiple of 8 and 3 is 24. Convert  

8

53

​

 and  

3

19

​

 to fractions with denominator 24.

24

159

​

−  

24

152

​

 

Since  

24

159

​

 and  

24

152

​

 have the same denominator, subtract them by subtracting their numerators.

24

159−152

​

 

Subtract 152 from 159 to get 7.

24

7

​

Step-by-step explanation:

8 0
3 years ago
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A company made a profit of $90,000 in the year 2006. In 2010, the same company made a total profit of $135,000. If the rate of c
Firlakuza [10]

Answer:

Average rate of change = $11250 per year.

Step-by-step explanation:

Let's take two points from given information (2006, 90000) and (2010, 135000).

Now, use slope formula to find slope.

Slope =\frac{y2-y1}{x2-x1}

Use the two points to find average rate of change (slope)

Average rate of change =\frac{135000-90000}{2010-2006}

                                        =\frac{45000}{4}

                                       =11250

Average rate of change = $11250 per year.

6 0
3 years ago
Dirrens' oven only measures in degree Fahrenheit (°f).show that 200°C would be 392°F.
Ainat [17]

I think you shouldn't memorize any formula to solve it. But you should know that on the fahrenheit thermometer freezing point is 32 and the boiling point is 212. And in celcius, it is 0 and 100. So we can make the inference that changing 100 units in celcius corresponds to a change of 180 units in fahrenheit. Thus, we should ask that if celcius increase from 0 to 200, what would happen to fahrenheit.

Basic math:

While celcius increase 100, fahrenheit increase 180,

While celcius increase 200, fahreinheit increase 360.

And you shouldn't forget that fahrenheit's freezing point is 32.

32+increase(360)=392

4 0
3 years ago
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