Ustin weighs 15 pounds less than greg weighs. half of greg's weight is 75 pounds less than justin's weight. how much does each of them weigh? a. greg weighs 200 pounds, and justin weighs 185 pounds. b. greg weighs 190 pounds, and justin weighs 175 pounds. c. greg weighs 180 pounds, and justin weighs 165 pounds. d. greg weighs 170 pounds, and justin weighs 155 pounds.

answer:

we need to add 400 ml of the 40% solution

step-by-step explanation:

we take the amount times the percent concentration and add what we mix to get the final concentration

we need the final mixture to be 30% and we have 200 +x milliliter added together so that will be the amount in the container

200 * 10 % + x* 40 % = (200+x) *30%

change the percent to decimal form

200 * .10   + x* .40   = (200+x) *.30

distribute the .30

20 + .4x = 60+.3x

subtract .3x from each side

20 + .4x-.3x = 60+.3x-.3x

20 +.1x = 60

subtract 20 from each side

20-20 +.1x = 60-20

.1x = 40

divide by .1

.1x/.1 = 40/.1

x=400

we need to add 400 ml of the 40% solution

answer:

.3

step-by-step explanation:

15 - 14.7 =

15 .0

-14.7

we need to borrow from the ones place

14.   10

-14.   7

      .3      

15- 14.7   = .3

notice, that'd be the standard form for a quadratic equation, all variables on the left-hand-side, sorted in ascending order.

answer:

step-by-step explanation:

we can simplify the given equation to isolate y so we get the slope intercept formula ,

because the slope intercept formula is

y= mx+b

here we are given that

y-3 = 2(x+4)

distriute the 2 on the parenthesis

y-3= 2x+8

add 3 to both sides

y= 2x+8+3

y=2x+11

so the slope intercept formula

is

y= 2x+11