Answer:
- Number of calories in burger = 620 calories
- Number of calories in hotdog = 400 calories
Step-by-step explanation:
Number of calories in burger = x
Number of calories in hotdog = y
y = x - 220
x + 2y = 1,420
Substitution:
x + 2 * (x - 220) = 1,420
x + 2x - 440 = 1,420
3x = 1,420 + 440
x = 1,860 / 3
x = 620 calories
y = x - 220
= 620 - 220
= 400 calories
Answer:
x = -8
Step-by-step explanation:
(-8, 7) and (-8, -2)
m=(y2-y1)/(x2-x1)
m=(-2-7)/(-8+8)
m=(-9)/0
m = undefined slope or no slope
x = -8
Answer:
9 nickels
Step-by-step explanation:
He has 17 coins.
$1.25 is 12 dimes and 1 nickel. But that is only 13 coins.
$1.25 can only be 17 coins if there were 9 nickels and 8 dimes.
Answer:
$3.50
Step-by-step explanation:
42 divided by 12 is the price of one cookie.
42 divided by 12 = $3.50
hope this helps :)
