Answer:
,
Step-by-step explanation:
we know that
In a parallelogram, opposite angles are congruent and consecutive angles are supplementary
so
----> equation A
-----> equation B
we have

substitute in the equation B and solve for m<R


-----> substitute in equation A
Answer:
No Solution
Step-by-step explanation:
If xy = 1, and y is 0, then you can plug in 0 for y. x(0) = 1. You would then need to divide by 0 on both sides, but you cannot do that. Therefore, there is no soultion.
What is the variables replacement
Answer:
7
Step-by-step explanation:
4-(-3)=
4+3=
7
Answer:
53
Step-by-step explanation:
Let x be the number of children tickets sold and y be the number of adult tickets sold. Then
x+y=128.
The cost of x children tickets is $5.10x and the cost of y adult tickets is $9.70y, so
5.10x+9.70y =896.60.
From the first equation,
x=128-y,
then

53 adult tickets were sold.