What would the expression be for the total cost of an item x with 7% tax

Mathematics

1 answer:

Maslowich3 years ago

3 0

X + .007(X) I believe.

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Solve the following word problem. A man travels from Town X to Town Y at an average rate of 50 mph and returns at an average rat

777dan777 [17]

Distance = rate*time

Let distance from X to Y be 'd'

From the equation we can solve for 'time'

time = distance/rate

The total time it takes to go 50 mph ,then 40 mph is:

$\frac{d}{50} + \frac{d}{40}$

The total time it takes to go 45 mph round trip is:

$\frac{2d}{45}$

We know that the round-trip at 45 mph takes half-hour shorter, so by adding '1/2' to its time it will be equal to the time to go 50 then 40.

$\frac{2d}{45} + \frac{1}{2} = \frac{d}{50} + \frac{d}{40} \\ \\ \frac{4d+45}{90} = \frac{9d}{200} \\ \\ 800d+9000 = 810d \\ \\ 10d = 9000 \\ \\ d = 900$

Answer: The distance from X to Y is 900 miles.

7 0

3 years ago

Show me how to a calculator. That use divide using partial quotients

eduard

Yeah basically it is 0.98

5 0

3 years ago

Help on #6 need to know now

eduard

10 because first brackets is 0 second brackets is 10 15*0 is 0 0+10 is 10

4 0

3 years ago