If f(x)=x^2 +2x -1
a) 2=x^2+2x-1
0=x^2+2x-3
0=(x+3)(x-1) x=-3 or 1
b) 14=x^2+2x-1
0=x^2+2x-15
0=(x+5)(x-3) x=-5 or 3
c) 7=x^2+2x-1
0=x^2+2x-8
0=(x+4)(x-2) x=-4 or 2
d) -1=x^2+2x-1
0=x^2+2x+0
0=(x+2)x x=0 or -2
Since this function involves a quadratic equation, there are technically two possible inputs that will give you the same output. In your case, you just have to match one of the possible inputs to its output (the numbers on the left originally given, from what it seems.) Hope this helps
Answer:
(0, -1)
Step-by-step explanation:
The c value of the equation represents the y-intercept. c=-1 so the y-intercept must be (0,-1)
Answer:
D. 78°
Step-by-step explanation:
50°+28°= 78°
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Answer:
92 m
Step-by-step explanation:
Use the Pythagorean theorem to find the length of the shorter side.
Let w = length of the shorter side.
The perimeter is 2l + 2w = 2(30) + 2(16) = 60 + 32 = 92 m
Answer:
In a cube, the length and width are the same, so both sides will be 7 cm, yielding an area of 49 square centimeters. The surface area of a 7 cm cube will be 294 cm2 . Hope this helps!
