Ubcdjhjdhj Ubcdjhjdhj
  • 23-02-2017
  • Mathematics
contestada

What are the x-intercepts of y = 2x2 - 3x - 20?
A) x = -5 and 2
B) x = 5 and -2
C) x = -2.5 and 4
D) x = 2.5 and -4

Respuesta :

Аноним Аноним
  • 23-02-2017
x-intercepts  when y = 0
so

 2x^2 - 3x - 20 = 0
(2x + 5)(x - 4) = 0

2x + 5 = 0
x = -5/2
x = -2.5

x - 4 = 0
x = 4

answer:

C) x = -2.5 and 4 
Answer Link

Otras preguntas

if f(x)= 5x - 1 and g(x)= 2x^2+ 1 what is the value of (f × g)(-3) OPTIONS: A. 254 B.-254 C. 304 D. -304 E. -354
solve each system by substitution 14x-35=7y -25-6x=5y
Which law had led to a 40 percent increase in employments for women
How did world war 1 contribute to the rise of Adolf Hitler and the nazi party in Germany
evaluate 3y-2 for y=9
He length of a rectangle is 12 in. And the perimeter is 56 in. Find the width of the rectangle. A. 21 in. B. 22 in. C. 32 in. D. 16 in.
I’m 1900, which nation controlled more territory than any other imperial nation? A. Germany B. Japan C. United States D. Great Britain
Suppose you work in a clothing store. Each week you earn $250 plus a commission equal to 2.5% of your sales. This week your goal is to earn no less than $350. W
The image shows the representation of an unknown element in the periodic table. A square is shown. Inside the square ten is written at the top righthand side.
What made Georgia’s black codes different than those of other states? Question 8 options: A. Georgia’s black codes were not as strict. B. Georgia’s black code