Every answer to number 1 is detailed and is highly based on substitution... please kindly follow me.. I'll try my best to provide the next answer before I fall asleep.. and click on the thanks button..
Answer:
x=5,y=-12
Step-by-step explanation:
You add the two equations to get: 4x=20
Then you get x=5.
You plug this in to x-y=17 to get y=-12
The answer is x=5 and y=-12
Answer: - = less than
x = product
/ = quotient
= is
Step-by-step explanation:
Answer: 80
Step-by-step explanation:
Looking at the ratios in the table, the number of days to number of questions is 1:5 (4x5=20; 8x5=40;11x5=55). So for 16 days it will be 16x5=80
