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3 years ago

It took 4 hours to drive 240 miles. At this rate, how long does it take to drive 150 miles?

Mathematics

2 answers:

Alexxx [7]3 years ago

8 0

Answer:

The correct answer is 11/2.

Fittoniya [83]3 years ago

4 0

Answer:2 hours and 30 minutes

Step-by-step explanation:

they drive 60 miles in a hour.

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Neil drives at an average speed of 60 miles/hour to reach his destination 480 miles away. On the way back, he decides to increas

daser333 [38]

Answer:

480/(x+60) ≤ 7

Step-by-step explanation:

We can use the relations ...

time = distance/speed

distance = speed×time

speed = distance/time

to write the required inequality any of several ways.

Since the problem is posed in terms of time (7 hours) and an increase in speed (x), we can write the time inequality as ...

480/(60+x) ≤ 7

Multiplying this by the denominator gives us a distance inequality:

7(60+x) ≥ 480 . . . . . . at his desired speed, Neil will go no less than 480 miles in 7 hours

Or, we can write an inequality for the increase in speed directly:

480/7 -60 ≤ x . . . . . . x is at least the difference between the speed of 480 miles in 7 hours and the speed of 60 miles per hour

___

Any of the above inequalities will give the desired value of x.

4 0

3 years ago

Determine the value of z for the system of equations.

Natali5045456 [20]

Answer:

{x, y, z} = {-4, 2, 4}

i think this is the answer

7 0

3 years ago

What is 3 1/4 - 2 1/2

sergiy2304 [10]

The answer is just do easy subtraction 3/4

6 0

2 years ago

If the cost of a bat and a baseball combined is $1.10 and the bat costs 41.00 more than the ball, how much is the ball?

shepuryov [24]

Step-by-step explanation:

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3 years ago

What is the equation of the parabola with vertex (6,7) and focus (7,7)?

Delicious77 [7]

Answer:

Step-by-step explanation:

If you plot these points on a coordinate plane, you see that they are on the same horizontal line, y = 7, with the focus 1 unit to the right of the vertex. This means that the parabola is a sideways opening parabola, to the right, to be more specific. That means that it has the basic vertex form

$4p(x-h)=(y-k)^2$

where p is the distance in units from the vertex to the focus, h is the first coordinate in the vertex, and k is the second coordinate in the vertex. For us, p = 1, h = 6, and k = 7. Now we will just fill the vertex form of the equation in with our values:

$4(x-6)=(y-7)^2$

We will solve this for x now by dividing each side by 4 and adding over the 6:

$x=\frac{1}{4}(y-7)^2+6$

4 0

3 years ago