Xavier (x) has $20 more than Sara (s). Their combined money totals $90. Which system of equations represents this situation? a
x + s = 90 s + x = 20
b
x + s = 90 x - s = 20
c
x - s = 90 s + s = 20
d
s - x = 90 x - s = 20

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

3+3+3+2*2*2+29*12 = 365

step-by-step explanation:

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated

if i'm not wrong, i would say that the third angle has (72) because the three sides of all triangles have 180 degrees and if we subtract 180 - 62 - 40 = (72) / but i'm not sure about 40 yd.