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2 years ago

How long does it take to travel 350 miles at 70 mph

Mathematics

2 answers:

Blizzard [7]2 years ago

7 0

Answer:

5 hours

Step-by-step explanation:

350 miles / 70 mph = 5 hours

castortr0y [4]2 years ago

5 0

Answer: 5 hours

Step-by-step explanation: 1) Find the number of hours by dividing the distance by mph. The number of hours will be to the left of the decimal point:

350 miles / 70 mph

= 5

= 5 hours

2) Find the number of minutes by multiplying what is remaining from step 1 by 60 minutes. The minutes will be to the left of the decimal point:

0 x 60

= 0

= 0 minutes

3) Find the number of seconds by multiplying what is remaining from step 2 by 60 seconds. The seconds will be to the left of the decimal point:

0 x 60

= 0

= 0 seconds

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Answer:

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Step-by-step explanation

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David bought 3 dvds and 4 books for $40 at a yard sale. Anna bought 1 dvd and 6 books for $18. How much did each dvd and book co

Ber [7]

Answer:

A book is worth $1 and a DVD is worth $12.

Step-by-step explanation:

The equations (2 unknowns and two equations, d is for a DVD and b is for a book):

For David: 3d+4b=40

For Anna: d+6b=18

Now multiply the second equation with -3 and add to the first equation:

3d+4b=40

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Now for DVD price, use the second equation:

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8 0

2 years ago

What percent of 3000 is 18??

77julia77 [94]

To solve this problem you have to set up a proportion. To form one side of the proportion you use "is over of" meaning what number represented by is, in this case 18, is placed over the number represented by of, 3000. $\frac{18}{3000}$ Since you are finding the percent of something, youre x value is placed above "100" because percent values are most commonly out of 100%. $\frac{x}{100}$
So now your proportion will look like $\frac{18}{3000}$ $\frac{x}{100}$ To solve the proportion you cross multiply and divide. So you multiply 100 and 18 since they are crossed from each other, then divide 1800 by 3000. The answer is .6. 18 is .6% of 3000.

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