Answer:
A) d=70h
B) 245 Miles
Step-by-step explanation:
If h is hours and d is distance, you are traveling 70 miles per hour and d is miles.
Since the equation is d=70h, you substitute the 3.5 for the d:
d=70(3.5)
70 times 3.5 is 245
h=245
2x^-2y^-2 = 2/x^2y^2 = 2/(2)^2 x (3)2 = 2/4 x 9 = 2/36 = 1/18
2x^2+20x = -38
2x^2 + 20x + 38 = 0
Divide both sides by 2.
x^2 + 10x + 19 = 0
The quadratic formula works very well here.
Let a = 1, b = 10 and c = 19
x = [-b +- sqrt{b^2 - 4ac}]/(2a)
Plug those values into the formula to find two answers for x.
One is negative and the other positive.
Good luck.
Parallel 100% if you need more help with these type of questions just ask I'm here.