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navik [9.2K]
3 years ago
12

a person Can travel 120 miles in one direction. the return trip was accomplished at double the speed and took three hours less t

ime. Find the speed going.
Mathematics
1 answer:
BaLLatris [955]3 years ago
6 0
40 mph would be 120 miles in 3 hours (120/40)

80 mph is 120 miles in 1.5 hours(120/80)

3 - 1.5 = 1.5, not 3 hrs

Change the speed to 20 mph( 1/2 the speed) to double the hours.

20 mph = 6 hours(120/20)

40 mph = 3 hrs(120/40)

6 - 3 = 3 hours difference
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i need help on math
dolphi86 [110]
X=2
2x-3=-x+3

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add 1x to each side
should be left with 3x=6
divide both sides by 3 to get x alone
your answer then is x=2
7 0
3 years ago
Find the Value of X (In this picture)​
slava [35]

Answer:

x = 63

Step-by-step explanation:

It's Quadrilateral so:

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x=63

4 0
3 years ago
Please help me, I'm doing a test.
Tju [1.3M]

Answer:

(3,4)

Step-by-step explanation:

first you're going to solve the equation -2x

your equation should now be: \left \{ {{-2x+3y\\=6} \atop {-2x=2-2y}} \right.

next you're going to substitute the given value of -2x into the equation -2x+3y=6

so your equation should now be: 2-2y+3y=6

next you're going to solve the equation for y

equation should now be: y=4

than you're going to substitute the given value of y into the equation -2x=2-2×4

then you're going to solve the equation for x

your equation should now be: x=3

then the possible solution of the system is the order pair: (x,y)=(3,4)

4 0
2 years ago
How can you use the sign of the points to determine location? please help and i will give brainliest :D
Vladimir [108]

To determine the location of a point on a graph, the first number of the ordered pair is a x-coordinate which means the first number you would look for would be the horizontal line, or the x-axis. The second number is the y-coordinate which means that you would look on the vertical line, or the y-axis. You would go on the horizontal line first, then from there go up to the y-coordinate and place your point. (I'm sorry if it's long but you can try to shorten it.)

Hope this helped!

Have a nice day!

8 0
3 years ago
If $500 is invested at 8% annual interest, how much will be in the account after 3 years if it's compounded quarterly?
Alchen [17]

Answer:

FV= $634.12

Step-by-step explanation:

Giving the following formula:

Initial investment (PV)= $500

Number of periods (n)= 3*4= 12 quarters

Interest rate (i)= 0.08/4= 0.02

<u>To calculate the future value, we need to use the following formula:</u>

<u></u>

FV= PV* (1 + i)^n

FV= 500*(1.02^12)

FV= $634.12

8 0
2 years ago
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