It can show how much you have and how much you want
Answer:
X=7 1/3, y=0
Step-by-step explanation:
1) 1.5x+2y=11 --> 3x+4y=22
2) 3x+6y=22
Subtract 1) from 2)
2y=0
y=0
Plug into 2)
3x+6*0=22
3x=22
x=7 1/3
Answer:
- f⁻¹(x) = 2x - 8
- f⁻¹(4) = 0
Step-by-step explanation:
You can find an inverse function by interchanging x and y, then solving for y.
Original function:
y = (1/2)x +4
With x and y interchanged:
x = (1/2)y +4
Subtracting 4 gives ...
x -4 = 1/2y
Multiplying by 2 gives ...
2x -8 = y
Then the inverse function is written ...
f⁻¹(x) = 2x - 8
Evaluating this for x=4, we get ...
f⁻¹(4) = 2·4 -8 = 0
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It looks like your answer boxes are filled with ...
3(x+4)= 3x+12
3x+12+x+3+x=5x + 15
5x+15=180
5x=180-15
5x=165
x=165/5
x= 33min
mowing the grass = 3(x+4)
= 3(33+4)
=99+12
=111 min mowing grass