Answer:
B
Step-by-step explanation:
If you are allowed to use a graphing calculator, this can solve a lot of time. Graphing y = (x - 705)(x - 795) + 800(x - 750)(x - 835) gets us a parabola with x-intercepts of 749.97 and 834.924.
These roots are real and distinct, or choice B.
If you aren't allowed to use a graphing calculator, you can expand and combine like terms to get 801x^2 − 1269500x + 501560475. Looking at the discriminant, we see that (−1269500)^2 - 4*801*501560475 = 4630488100 is greater than 0 and not a perfect square, so it is real and distinct, or choice B.
I hope that helps!
Answer:
A
Step-by-step explanation:
You don't know whether they're all 90 degrees because we don't know about AB and CD.
Answer:
Step-by-step explanation:
This is an inequality, not an equation. There will be a set of x-values for which the inequality will be true.
First eliminate the fractional coefficient 2/5 by multiplying all terms by 5:
25 < 2x + 15 ≤ 75
Subtracting 15 from each 5, (2/5)x, 3 and 15 yields:
22 < 2x ≤ 60
Dividing all three terms by 2, we get:
11 < x ≤ 30
Thus, any number greater than 11 but equal to or less than 30 is a solution.
It is 34 because 34*100 is 3400 so 3400/34=100
