For the same amount set up two equations set equal to each other.
$70h + 130 = 80h + $40
Subtract 80h from both sides
-10h + 130 = 40
subtract 130 from both sides
-10h = -90 divide both sides by -10
h = 9 hours
CHECK
70(9) + 130 = $760
80(9) + 40 = $760
Answer:
N≤(20/3); Kindly rate
Step-by-step explanation:
The number N of pounds you can buy if you have $20, given that the cost of Berries is $3 per pound will be less or equal to (20/3)
You would multiply by 77%, or .77, because it would give you the answer right away instead of finding 23% and then then having to subtract it from the original number
7. You are given two angles and their sum, all in terms of x. Set the sum equal to the sum:
... (4x -1) +(2x +15) = (8x +8)
... 6 = 2x . . . . collect terms, subtract 6x+8
... 3 = x . . . . . divide by 2
To find the angles, fill in this value for x
∠AOB = 4·3 -1 = 11
∠BOC = 2·3 +15 = 21
∠AOC = 8·3 +8 = 32
8. Same deal.
... ∠BOC + ∠COD = ∠BOD
... (3x -10) +(8x +13) = (12x -6)
... 9 = x . . . . . . . . subtract 11x-6
And the angle values are ...
∠BOC = 3·9 -10 = 17
∠COD = 8·9 +13 = 85
∠BOD = 12·9 -6 = 102