Sandy is twice as Charlotte, who in turn is 5 years older than Emma. If their total age is 47 years, how old is each of them​

Emma is 8, Charlotte is 13, and Sandy is 26. 26 + 13 + 8 = 47

Step-by-step explanation:

First you need to figure out Emma's age. I did this by writing it out as such:

Emma + (Emma +5) + 2x (Emma +5) = 47

(Emma) (Charlotte) (Sandy)

Then I grouped similar things:

4x (Emma) + 15 = 47

Subtract 15 from both sides:

4x (Emma) = 32

Divide both sides by 4:

Emma = 8

To find Charlotte's age:

8 + 5 = 13

To find Sandy's age:

13 x 2 = 26

Check:

26 + 13 + 8 =47

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925