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Dominik [7]
3 years ago
7

Sarah has to travel 60 miles to see her friend. Her dad drives at 30 mph and her uncle drives at 40 mph. How much time does she

save if she travels with her uncle rather than her dad​
Mathematics
1 answer:
REY [17]3 years ago
5 0

Answer:

1h30min

Step-by-step explanation:

You might be interested in
Please let me know the correct answer.
NNADVOKAT [17]

Set h to 640 and solve for t:

640 = -490t^2 + 1120t

Subtract 640 from both sides:

-490t^2 + 1120t - 640 = 0

The formula to solve a quadratic equation is:

x = -b -/+ sqrtroot (b^2-4ac)/(2a) where a = -490, b = 1120 and c = -640

Solve:

x = -1120 -/+ sqrtroot (1120^2-4(-490)(-640) )/ 2(-490)

x = 8/7 = 1.1428 = 1.14

Time was 1.14 seconds

4 0
3 years ago
What is the slope of the line that passes through the points (5,8) and (7,4)
ehidna [41]

Answer:

slope is -2

Step-by-step explanation:

1. go to geogebra.org/classic (this is a graphing calculator)

2. enter your two points by using the second button on the top of the screen

3. connect a line from one point to the other using the 3rd button on the top of the screen

4. click on the line and it shall tell you the equation, including the slope :O))))

the slope is -2 and the equation is y = -2x + 18

5 0
2 years ago
Read 2 more answers
What is the slope of the line perpendicular to the segment with endpoints (2,0) and (-6,3)?
r-ruslan [8.4K]

Answer:

A line that passes (2, 0) and (-6, 3) has slope:

S1 = (-6 -2)/(3 - 0) = -4/3

Another line that is perpendicular with above line has slope:

S2 = -1/S1 = -1/(-4/3) = 3/4

=> Option B is correct

Hope this helps

:)

3 0
3 years ago
Which is the function rule that will transform a geometric figure by reflecting across the y-axis and
likoan [24]
I think it’s between the first and third one
8 0
2 years ago
56/(7-9)^3-25/23-5*4
meriva
I got -28.08695652. It doesn't repeat nor does it terminate
4 0
2 years ago
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