1) 3/40
2) 13/22
3) -1/4
4)5/12
5)-3/16
6)-3/22
7)1/10
8)8/7
9)-7/6
Answer:
x=0.5 and y=5
Step-by-step explanation:
8x+7y=39...eqn(1)×-14
4x-14y=-68...eqn(2)×7
we now have,
-112x-98y=-546
-(28x-98y=-476)
-140x÷-140 =-70÷-140
x=0.5
to solve for y, we substitute (x=0.5) into eqn (1) or eqn 2 which ever you want...
so I'm using eqn 1.
8x+7y=39
8(0.5)+7y=39
7y=39-4
7y÷7=35÷7
y=5
therefore, x=0.5, y=5
proof: substitute both x and y values to get you the same answer as the original solutions in both equations.
we have,
8(0.5)+7(5)=39
4(0.5)-14(5)=-68
Answer:
c) x^6 y^11 z^6
Step-by-step explanation:
When multiplying exponents with the same variables, you add them.
so x^4(x^2) would be 4+2 and therefore x^6.
keep in mind this doesn't apply for different variables
(xy^2)(x^2y) will not be added!!
Answer: 1. 1/2 + try to figure out the rest I believe in you
Step-by-step explanation:
First cross simplify 1. 1/2 2/2 = 1/1 x 1/2, then multiply 1 x 1, then 1 x 2 = 1/2 for the first one, use the same for the rest.
