Answer:
432 people on Friday and 658 on Saturday
Step-by-step explanation:
Lets use variables for each day
x=Friday and y=Saturday
now write two equations since you were given two different information (money and people)
$6 on Friday and $8 on Saturday with a total amount of $7856
the equation will be 6x+8y=7856
now the second equation will be for people
x amount of people on Friday and y amount of people on saturday for a total of 1090; the equation will be
x+y=1090
put them together
6x+8y=7856
x+y=1090
now you can cancel a variable but manipulating one of the equations. We'll use x, to cancel x you need make it zero so multiply the bottom by -6
6x+8y=7856
-6(x+y=1090)
6x+8y=7856 now subtract downwards, with the x cancelling
-6x-6y=-6540
2y=1316 simplify
(2y/2)=(1316/2)
y=658
insert y into x+y=1090
x+(658)=1090
-658 -658
x=432
Answer:
B
Step-by-step explanation:
3x - 2y = 8 → (1)
x + y = 6 → (2)
Multiplying (2) by 2 and adding to (1) will eliminate y
2x + 2y = 12 → (3)
Add (1) and (3) term by term to eliminate y
(3x + 2x) + (- 2y + 2y) = (8 + 12) , that is
5x + 0 = 20
5x = 20 → B
For #1 the answer is A because if lines parallel then exterior angles congruent.
