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

Which of the following is an example of a concept album? a. the joshua tree b. nevermind c. tapestry d. songs for swingin' lovers

the volume of a box that's 9 centimeters long, 6 centimeters wide, and 3 centimeters high is _______ cm3

Choose the definition of: vegetarian a. a person who eat only diary b. a person who eats only meat and no diary c. a person who does not eat meat d. a perso

In which sentence is the underlined phrase an adverb prepositional phrase? The United States launched its Skylab space station in May 1973. Some of the exp

The circulation of a newsletter decreased from 5200 to 3140 find the percent of decrease in circulation to the nearest percent

how do you ensure that your files are kept private on your computer

School |Number of Student _______________________ CCHS |1284 _______________________ EHS |987 ______________________ WAHS |1063 _______________________

3. How is world history defined?a. It examines history from a global perspective.b. It examines the history of the United StatesOf Amec. It examines history on

A rock bounces down a mountain. When will its kinetic energy be greatest?

2 a b a b simplify the expression in exponential notation.