Answer:
85%
Step-by-step explanation:
5^3 (five to the third power) and 5x5x5
The equation is
![y=(x-7)^2+7](https://tex.z-dn.net/?f=y%3D%28x-7%29%5E2%2B7)
.
We are looking for a function with a vertex above the x-axis and a function that opens upward (has coefficient a > 0).
The first function opens downward and intersects the x-axis. The second function has a vertex below the x-axis. The third function satisfies our requirements. The fourth function has a vertex on the x-axis.
We can solve this algebraically with the knowledge that the real solutions of a quadratic are its x-intercepts. If there are no x-intercepts (because it lies entirely above or below the x-axis), then there are no real solutions. This is true when the discriminant
![b^2-4ac \ \textless \ 0](https://tex.z-dn.net/?f=b%5E2-4ac%20%5C%20%5Ctextless%20%5C%20%200)
. You can see that from the quadratic formula. This holds true for both answers A and C, so to find the correct one, we remember that when the coefficient a of the
![x^2](https://tex.z-dn.net/?f=x%5E2)
term is positive, the graph opens upwards, so we choose
C.
Answer:
Step-by-step explanation:
57000 is 5.7*10^4
Answer:
First box : 2
Second box : 8
Third box : 4
Fourth box : 80
Fifth box : 240
Step-by-step explanation:
First, 9 - 7 = 2
Second, 2 x 2 x 2 = 8
Third, 8/2 = 4
Fourth, 320/4 = 80
Fifth, 80 x 3 = 240
Hope this helps!