Alex went to the store and purchased red and blue Jelly Beans. The ratio of red to blue Jelly beans is 3 to 7. If 140 Jelly Beans were in the bag, how many red Jelly Beans were in the bag? pl

42

Step-by-step explanation:

Total = 140 Jelly Beans

You are interested in the 3 part of the ratio.

Notice the word total. You should not be using 3/7 at all.

The ratio you want is 3/10. 10 represents the total.

3/10 = x / 140               Cross multiply

10 x = 3 * 140

10x = 420                     Divide by 10

10x/10 = 420 / 10

x = 42

Check

How many jelly beans are left?

140 - 42 = 98

Thats the number of Blue Jelly Beans.

Does 42/98 = 3/7?

Yes. Divide top and bottom by 14 and you get 3/7

answer: i realy don't get it that much can you me figer it out pleas you

step-by-step explanation:

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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