01-02-2017
Mathematics

contestada

ELIMINATION!! How do you work out 4x+7y= -80 and 3x+5y= -58

ELIMINATION How do you work out 4x7y 80 and 3x5y 58 class=

Respuesta :

BritishAce BritishAce

01-02-2017

Oh, I love elimination <3 Would you like to eliminate x or y?

Answer Link

apetrostone apetrostone

01-02-2017

3(4x+7y=-80)
-4(3x+5y=-58)

12x+21y=-240
-12x-20y=232
the x's cancel out and you're left with
y=8
then you plug in y and get
4x+7(8)=-80
4x+28=-80
4x=-108
x=27

Answer Link

Otras preguntas

Who wrote the gift of magic

Find the exact value of each expression. DO NOT use a calculator. sin 22π/3

Trevor Noah Book Born and crime

7/10 of what number is 0.14 show all steps

NEED HELP FOR 50 points and possible brainliest if the answer is legitimate. YOU BE THE TEACHER Your friend solves the system of linear equations below. Is your

Do you think Henry Grady should be honored around Atlanta? 1) Yes 2) No

Who wrote the gift of magic

A cylindrical oil tank 8 ft deep holds 350 gallons when filled to capacity. How many gallons remain in the tank when the depth of oil is 5 1/2ft?

What expression is equivalent to (5z²+3z+ 2)²? O 5z²+3z²+4 5z²+9z²+4 25z4+30z³+19z²+12z+4 O 25z4+30z³+29z²+12z+4

Finland briefly had a King in 1918. From which country's royal family was he taken?