While it's pretty obvious to most of us that
-13x=90-2y
-6x=48-2y
is a system of linear equations, it'd be well to include that info plus the instructions "solve this system of linear equations."
Subtract the 2nd equation from the first:
-13x=90-2y
+6x=-48+2y
-----------------------
-7x = 42. Then x = -42/7, or x = 6.
Now subst. 6 for x in either one of the given equations. Suppose we use the 2nd equation:
-6x=48-2y
Then -6(6)=48-2y, or -36 = 48 - 2y, or 2y = 48+ 36 = 84. Then y = 42.
The solution is (6, 42).
If you combine like terrms its easy, you just have to -5+5+6y, 6y=16 y=2.66666667
Answer:
for x < 0 x^2 - 2
for x 
0 2x + 1
Step-by-step explanation:
Answer:
p ≥ 7/4
Step-by-step explanation:
Answer:
$100
Step-by-step explanation:
40x30=1200
1200/12=100
