acemint
acemint acemint
  • 11-04-2020
  • Mathematics
contestada

which is a solution to (x-2)(x+5)=18?
A. x= -10
B. x= -7
C. x= -4
D. x= -2

Respuesta :

krikside
krikside krikside
  • 11-04-2020

Answer:

B

Step-by-step explanation:

Since you are given options, simply plug in numbers.

A won’t work because (-10+5) = -5 and 18 clearly is not divisible by 5.

B works:

(-7-2)(-7+5) = -9(-2) = 18

Answer Link
wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 11-04-2020

Answer:

x = -7

Step-by-step explanation:

(x-2)(x+5)=18

We can substitute the possible solutions in and see if they are true

x = -10

(-10-2)(-10+5)=18

-12 * -5 = 18

60 =18

False

x = -7

(-7-2)(-7+5)=18

-9 *-2 = 18

18 = 18  True

x = -4

(-4-2)(-4+5)=18

-6 *1 = 18

-6 = 18

False

x=-2

(-2-2)(-2+5)=18

-4 *3 =18

-12 = 18

False

Answer Link

Otras preguntas

In the latter stages of the Civil War, who was given the responsibility of winning the war for the North? 1.William Sherman 2.George McClellan 3.Ulysses Grant 4
What helped increase the rice profits for producers in South Carolina
Is -5 an irrational number?
What was the primary goal of spanish explorers in texas?
How long does it take to drive across japan?
Why do you think ethics are important to veterinary science and medicine
What were the intellectual and artistic hallmarks of the renaissance?
Which is an example of a condition in which homeostasis is maintained using a negative feedback loop? A. low blood glucose B. break or tear in blood vessel wall
They are 4 muffins on each plate. They are 0 plates of lemon muffins. How many lemon muffins are there ?
What is the slope of a line? With the equation d=420-65t