Answer: c
Step-by-step explanation:
Because Giannis is better
Answer:
a) and d) are bijections. b) and c) are not
Step-by-step explanation:
a) Every linear non constant function is a bijection. We can easily find the inverse of f by making a simple calculus.
If y is on the function image, we have y = -3x + 4 for certain x, then
y- 4 = -3x
-(y-4)/3 = x
therefore
b) -3 * X² + 4 is not a bijection because quadratic funtions arent bijective. If you evaluate in opposite values you will obtain the same result. For example f(-1) = f(1) = 6
c) (x+1)/(x+2) is not a bijection. It isnt even defined in -2 because the denominator is equal to 0 if X= -2 and we cant divide by 0. A bijective function from R to R must be defined in every element of R. In general, homographic non linear functions are not bijective for the same reason this function is not.
d) is bijective. There isnt a simple argument we can use to conclude this. We have no other choice than trying to find the inverse function by making a calculus.
Y =
Y-1 =
Not that since 5 is odd, we can calculate independently of which value Y-1 takes. Therefore , and we can conclude that f is bijective.
I hope this helps you!
The answer has to be less that 100 but more that 80
I went to see if 92 + 93 + 94 would work but the right answer is 89 + 90 + 91 = 270
Hope it helped
To find a percentage increase of 15%, you can multiply the original value by 1.15.
To find a percentage increase of 20%, you can multiply the original value by 1.2.
117.7 * 1.15 = 135.355
So if she orders 15% extra tile, she will order around about 135.355 square feet.
117.2 * 1.2 = 141.24
And if she orders 20% extra tile, she will order around about 141.24 square feet.
Any number between those two values will be the amount of tile she might order.
Answer:
D
Step-by-step explanation:
Let E(x,y) represent the total earnings.
Then E(x,y) = ($20/lawn)x + ($5/bush)y (Answer D)