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

B) x + s = 90, x - s = 20

Step-by-step explanation:

x + s = 90 represents that both Xavier and Sara's money combined is $90.

x - s = 20 represents that Xavier has 20 more dollars than Sara.

529 and 531

step-by-step explanation:

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40