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vova2212 [387]
3 years ago
5

ms.lieber takes 4 hours to drive 210 miles from her home to yosemite National Park . if Miss Lieber's average speed for the firs

t two hours is 60 miles per hour, find her average speed for the last 2 hours
Mathematics
2 answers:
Fed [463]3 years ago
8 0
This is correlation between distance-time-speed that we will use in answering
d = vt
t = d/v
v = d/t
d stands for distance, v stands for velocity/speed, t stands for time

First, we should count the distance she took for the first two hours
d = vt
d = (60)(2)
d = 120
For the first two hours, she took 120 miles

Second, calculate the distance for the next two hours
d = total distance - first distance
d = 210 - 120
d = 90
The remaining distance is 90 miles

Third, calculate the speed for the next 2 hours
s = d/t
s = 90/2
s = 45
The speed for the last two hours is 45 miles per hour

Answer: 45 miles/hour
adoni [48]3 years ago
7 0
60 x 2 = 120 miles for the 2 hours,
210 - 120 = 90
AVG speed for the last 2 hours is 45 MPH
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3 years ago
Find what equals to x and what equals to y
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Answer:

x=15√2  y=90 degrees.

Step-by-step explanation:

Thanks to the Pythagorean Theorem we know that with any right triangle, A^2+B^2=C^2. In this case we can use 15^2+15^2=sqrt of 450. The square root of 450 is 15 times the square root of 2. Thus x=15√2. Now we need to find y. All angles in a triangle add up to 180 so if we have 45+45+y=180 then y=90.

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2 years ago
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3 years ago
Given g(x) = 10x + 2, find x when g(x) = 2.
Elan Coil [88]

Answer:

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Step-by-step explanation:

We are given:

g(x) =10x +2

and

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g(x) is equal to both 10x+2 and 2. Therefore, by substitution, we can set them equal to each other

10x+2=2

Now, we need to solve for x. First, move all the numbers to the same side. Subtract 2 from both sides

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To solve for x, we have to get x by itself. x and 10 are being multiplied. To get x alone, divide both sides by 10.

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3 years ago
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goldfiish [28.3K]
Answer:
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Explanation:
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This means that the total cost of the bill, with a tip, is $89.70.
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89.70 / 4 = 22.425 = $22.43 !

Hope this helps
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