Abag contains yellow marbles and red marbles, 65 in total. the number of yellow marbles is 5 more than 4 times the number of red marbles. how many yellow marbles are there?

16

Step-by-step explanation:

53

Step-by-step explanation:

You make formulas for it.

Y= yellow marble and r= red marbles

So we know y+r=65

and y=5+4r because there are 5 more (plus) and 4 times ( multiply) yellow marbles

so now we make y+r=65 to have r= so you subract to the y so you get r= 65-y

now you plug that into your other formula

y= 5+ 4(65-y)

distribute

y=5+ 260-4y

add common numbers

y=265-4y

add 4y from both sides

5y=265 ( it is 5y because there is already a 1y on that side and 1y+4y=5y

then divied both sides by 5      y=53

i think 1: 2

step-by-step explanation:

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.