Answer:
step 2 ...they didn't expand the brackets two times
H = hrs she worked
p = phone calls she answered
h x 10 + p x .25 = maggies earnings
Part A
h x 10 + 60 x .25 = 115
Part B
h x 10 + 15 = 115 (multiplied 60 x .25)
h x10 = 100 (subtracted 15 from each side of the equation)
h = 10 (divided 10 into each side)
Part C
10 hrs
Hope this helps
C. 3/5 of 45 = (45÷5)*3 = 27. 2/5 of 45 = 18 questions to complete. 4/5 of a minute = (60÷5)*4 = 48 seconds. 1 minute + 48 seconds = 1 min 48. 1 min 48*18 = 1944. 1944÷60= 32.4. Round or down and it gives 32 minutes.
Equation 1 minus equation 2 to eliminate x: 3y+2z=3
equation 1 plus equation 3 to eliminate x: 5y+6z=5
now focus on these new system of equation, multiply 3y+2z=3 by 3:
9y+6z=9
subtract 5y+6z=5 from 9y+6z=9 to eliminate z: 4y=5, y=1
Plug y=1 into 3y+2z=3 to find z: z=0
Plug y=1, z=0 into any of the three equations to find x. I'll use equation 1:
-2x+2+0=0, x=1
so the solution is x=1, y=1, z=0
Answer:
$25 per month
Step-by-step explanation:
$685 - $85 (installation fee) = $600
$600 / 24 (12 months in a year x2 for 2 years)
$25 per month