ange123
ange123
19-05-2016
Mathematics
contestada
solve the system of equations 3y+2z=12 and y-z=9
Respuesta :
apologiabiology
apologiabiology
19-05-2016
mulitply second equation by 2 and add to first
3y+2z=12
2y-2z=18 +
5y+0z=30
5y=30
divide 5
y=6
sub back
y-z=9
6-z=9
minus 6
-z=3
times -1
z=--3
x=-3
y=6
Answer Link
VER TODAS LAS RESPUESTAS ( 77+ )
Otras preguntas
solve this system of equation by substitution-2x-y=-95x-2y=18
Which systems in the body work together to maintain blood sugar levels? Select the best answer.A.digestive, circulatory B.circulatory, endocrine C.digestive,
Which systems in the body work together to maintain blood sugar levels? Select the best answer.A.digestive, circulatory B.circulatory, endocrine C.digestive,
Give an example of an integer that is not a natural number. Give an example of a real number that is not a rational number Please help me out on this problem Th
What are undesirable traits a person should aboid while driving?
Find the area of a triangle that has a base of 5 in and a height of 3 3/4 in
How did airplanes come to be?
Two lighthouses flash their lights every 20 seconds and 30 seconds respectively. Given that they flash together at 8 p.m, when will they next flash together?
You want to produce a scale drawing of your living room, which is 21 ft by 28 ft. If you use a scale of 5 in. = 7 ft, what will be the dimensions of your scale
After school, Marcus can walk 1 mile to the library in about the same time he can bike 2.5 miles to the sporting goods store. His speed on the bike is 6 mi/h f
