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Rufina [12.5K]
3 years ago
10

Help?? PLSSSS NOWWWWW

Mathematics
1 answer:
Vesnalui [34]3 years ago
7 0
Using the equation y=9x you can substitute x for the hours. Y=9 times 5 and y=9 times 8. Y=45 and y=72. The range is $45-$72
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12 pints 3 cups = ? cups *
Allushta [10]

Answer:15

Step-by-step explanation:

8 0
2 years ago
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Solve y(2y+1)+10=0 by using the Quadratic Formula.
Lorico [155]

Answer:

y= -1+- i √79/4

Step-by-step explanation: Here is the answer ^^

8 0
3 years ago
Jessie recently drove to visit her parents who live 240240 miles away. On her way there her average speed was 2525 miles per hou
dusya [7]

Answer:

The speed/rate to her parent's house is x = 75 mph

The speed/rate from her parent's house is y = 50 mph

Step-by-step explanation:

Given;

Distance to her parent's house = 240 miles

Total distance travelled (to and fro) = 240×2 = 480 miles

Total time taken t = 8 hours

On her way there her average speed was 25 miles per hour faster than on her way home (she ran into some bad weather)

Let x and y represent her speed to and from her parent's house respectively.

x = y+25 ......1

The time taken to her parent's house is;

time = distance/velocity

t1 = 240/x = 240/(y+25)

The time taken from her parent's house is;

time = distance/velocity

t2 = 240/y

Total time taken t = t1 +t2

t = 240/(y+25) + 240/y = 8

Solving for y ;

(240y + 240(y+25))/(y^2 +25y) = 8

Cross multiply;

240y + 240y+6000 = 8y^2 + 200y

480y +6000 = 8y^2 + 200y

8y^2 + 200y -480y -6000 = 0

8y^2 - 280y - 6000 = 0

Divide through by 8;

y^2 - 35y - 750 = 0

Solving the quadratic equation;

y = 50

or

y = -15

Velocity cannot be negative, so y = 50mph

From equation 1;

x = y+25

Substituting y =50

x = 50 + 25

x = 75 mph

The speed/rate to her parent's house is x = 75 mph

The speed/rate from her parent's house is y = 50 mph

3 0
3 years ago
Amanda can jog 18 miles in 5 hours.<br><br>At this rate, how many miles can Amanda jog in 4 hours?
matrenka [14]

Answer:

14.4

Step-by-step explanation:

Divide 18 miles by 5 hours to tell us how many miles she can do in 1 hour.

Multiply the answer by 4 to tell us how many miles in 4 hours.

(18/5) * 4 = 14.4 Miles

4 0
3 years ago
Read 2 more answers
HELPP
tigry1 [53]

Answer: C peridotite

Step-by-step explanation:

idk lol i just got it right on the quiz

4 0
3 years ago
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