Answer:
Putting the value in x = 2 , y =4 in 2x - 2y we get,
2 × 2 - 4× 2= 4-8 = -4
Putting the value in z = 3 in z - 5 we get,
z - 5 = 3 - 5 = -2
Answer: DC = 4
Step-by-step explanation: Because it is going 1 subtract everytime
A) 0.4, to do this just do 40/100
B) x + 0.4x= retail price
C) 56*0.4= 22.4, so add this to the original price for a total of $78.4
D) Just like in part C, 56*0.4= $22.4
<span>1A + 2C = $24, or, since A = 2S, you can write this as
2S + 2C = $24
The difference between $17 and $24 is $7, so this must be the cost of a child's ticket. Subtract this from $17 and you get $10, which must be the cost of 2 Senior tickets. So the Senior ticket costs $5, and the Adult ticket must cost $10.
Therefore 1 Adult and 1 Senior ticket costs $15 </span><span>
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