Jenniferp Jenniferp

01-05-2017
Mathematics

contestada

which of the following are solutions to 2x^2 -8x -90
A) 2
B) -5
C) -7
D) 9
E) 15
F) 5
G) 7

Respuesta :

altavistard altavistard

08-07-2018

Please equate 2x^2 -8x -90 to zero: 2x^2 -8x -90=0

Next, reduce 2x^2 -8x -90=0 by div. all terms by 2: x^2 -4x -45=0

Next, factor the poly: (x-9)(x+5) = 0

Set each factor = to 0 and solve for x:

x-9=0 => x=9
x+5=0 => x= -5

Answer Link

Otras preguntas

State weather the equation represents exponential growth, exponential decay or neither, 30 POINTS EASY

Plz help me with my math

How do you know "we seem to be a lot alike" is a statement of opinion? Btw Let's practice it page 148 grade 5

Lana is trying to find an equation for a line that passes through (5, 2) and is parallel to 3x + 2y = 15. Explain the steps that Lana could take to determine t

Most missing children are returned home alive or are located. Of the .2 percent not located or returned home, most were _____. a. killed b. taken from the cou

When preparing the budgeted income statement of a merchandising company, the amount of cost of goods sold can be taken from the

The fractional reserve banking system depends upon the _________________ of the public.

A nurse is auscultating the lung sounds of a client who came to the clinic for a physical exam.

To fulfill the requirements for a certain degree, a student can choose to take any 7 out of a list of 20 courses, with the constraint that at least 1 of the 7 c

(Need it by tomorrow!) Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Band students are tested o