Answer:
x=3 y=5/2
Step-by-step explanation:
1. 0.5x + y =4
2. 0.5x-y=-1
subtract the 2nd equation from the 1st
0.5x cancels out
2y = 5
y = 5/2
subs y = 5/2 into any one of the equations to find x
0.5x + 5/2 = 4
x = 3
subs to see if right:
(0.5 x 3) +5/2 = 4
(0.5 x 3) -5/2 = -1
Answer:
6.76
Step-by-step explanation:
applying pythogorem theorem
a^2+b^2=c^2
5^2+b^2=13^2
25+b^2=169
b^2=169/25
b^2=6.76^2
b=6.76
I don’t know exactly what your asking but x = 3
M = 8.25 + 6.25 + 4(6.25)
m = 8.25 + 6.25 + 25
m = $39.50
Find the least common denominator of all the fractions.
Change the mixed number into a fraction.
Follow the operations.
Your answer should be -20.