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Amanda [17]
3 years ago
13

In the first two hours of the trip, Julissa drove 120 miles. In the next hour, she traveled only 48 miles. What was Julissa’s av

erage speed in miles per hour (mph) for the three-hour drive?
Mathematics
1 answer:
viktelen [127]3 years ago
7 0

Answer:

Jane drives at an average speed of 45 mph on a journey of 135 miles. How long ... by speed. 135 miles ÷ 45 mph = 3 hours ... of 8 mph. If he cycles for 6½ hours, how far does he travel? ... in 4 hours. (a) What is her average speed for the first part of the journey? ... (a) What is average speed of the car in miles per hour? mph.

Step-by-step explanation:

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What is one of the solutions to the following systems of equations? Y squared plus X squared equals 65 and Y plus X equals seven
alukav5142 [94]

Answer:

Step-by-step explanation:

y^2 + x^2 = 65

y + x = 7......x = 7 - y

y^2 + (7 - y)^2 = 65

y^2 + (7 - y)(7 - y) = 65

y^2 + 49 - 7y - 7y + y^2 = 65

2y^2 - 14y + 49 = 65

2y^2 - 14y + 49 - 65 = 0

2y^2 - 14y - 16 = 0

2(y^2 - 7y - 8) = 0

2(y + 1)(y - 8) = 0

y + 1 = 0        y - 8 = 0

y = -1             y = 8

solution :

y = -1...........y + x = 7.....-1 + x = 7......x = 7 + 1......x = 8........(8,-1)

y = 8........y + x = 7.....8 + x = 7......x = 7 - 8........x = -1........(-1,8)

7 0
3 years ago
Marisa is measuring the distance d(t) that an ant marches in t minutes. Which of the following is the most appropriate domain fo
Tom [10]
C. All positive numbers. (Apex.)
5 0
3 years ago
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Please, I need this ASAP.<br> Find the value of x.
ira [324]

Answer:

x = 12\sqrt{2}

Step-by-step explanation:

Cos 45= 12/x

x=12/Cos 45

x=\frac{12}{\frac{\sqrt{2}}{2}}

x=\frac{24}{\sqrt{2}}

x= 12\sqrt{2}

4 0
3 years ago
A line has the equation y=x. It is translated up by 3 units. What is the equation of the new line?
olga nikolaevna [1]
Since we are shifting equation up 3 units, the equation would be y=x+3
4 0
3 years ago
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Can please someone help me out and explain it step by step. Thank you
Anit [1.1K]

Answer:x=7, \ y=-2

Step-by-step explanation:

Given

Equations are 3x-y=23 and 2x+3y=8

take 3x-y=23

y=3x-23

Put the value of y in another equation

\Rightarrow 2x+3(3x-23)=8\\\Rightarrow 2x+9x-69=8\\\Rightarrow 11x=77\\\Rightarrow x=7

Put the value of x in y

y=3(7)-23=21-23=-2

Hence, x=7, \ y=-2

7 0
2 years ago
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