Shannif7ranuel Shannif7ranuel

01-12-2016
Mathematics

contestada

2 numbers sum is 7 product is -18

Respuesta :

01-12-2016

x+y=7
x•y=-18

x+y=7
x=7-y

x•y=-18
(7-y)•y=-18
7y-y^2=-18
-y^2+7y+18=0
Y^2-7y-18=0
(y-9)(y+2)=0
y is either 9 or -2

x+y=7
x=7-y
X=7-9
X=-2

X•y=-18
9•(-2)=-18
-18=-18

There you go, y is 9 and x is -2

Answer Link

Otras preguntas

It takes lara 1/3 hour to walk to the library 3/4 mile away. what is her walking pace per hour?

PLS HELP THIS IS DUE TODAY! The sum of two consecutive integers is -15. Which equation could you use to find the two integers and what is the smaller integer?

Evaluate 6 t − 20 − 32 u 6t−20−32u6, t, minus, 20, minus, 32, u when t = 6 t=6t, equals, 6 and u = 1 4 u= 4

Find the Value of X. Name the angles.

Does the past 230 years of constitutional history prove the arguments of the federalists? or does it prove the arguments of the antifederalists?

Mrs. henry purchased 6.3 gallons of gas for $15.75. how much did each gallon cost?

Why do you think that companies in the united states were slow to adopt the quality management principles japanese companies had used to gain market share world

A college football player is getting his annual health assessment done. He explains to the doctor that he is on a diet that has extra protein to help build his

Drivers under the age of 18 can talk on the phone while driving only if using headphones, a wireless device, phone holder or mounted device. true/ false

Readers of a marketing plan can see the detailed estimate of an organization's profitability in the _______ section.