itzdulceee
05.12.2019 •
Mathematics
Marco is discussing how prices have changed with his son, paul. paul does not believe him, so they decide to research the price of their favorite food items. use the informations to determine the percent change in question 1-4. round your answers to the nearest tenth place.
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Ответ:
The rest of the question is the attached figure
The percent change =
If (+ve) increase and if (-ve) decrease
Part A: What is the percent of change in the cost of a pizza?
The initial price = $7.5
The final price = $9
The percent change = %
Part B: What is the percent of change in the cost of a cheeseburger?
The initial price = $5
The final price = $6.5
The percent change = %
Part C: What is the percent of change in the cost of a serving fries?
The initial price = $2
The final price = $4.5
The percent change = %
Part D: What is the percent of change in the cost of a hot dog?
The initial price = $2.5
The final price = $2
The percent change = %
Ответ:
y= -5 x=3
Step-by-step explanation:
x=y+8
4x+2y=2
4(y+8)+2y=2
4y+32+2y=2
6y+32=2
6y+32-32=2-32
6y=-30
6y divided by 6 = -30 divided by 6
y=-5
4x+2y=2
4x+2(-5)=2
4x-10=2
4x-10+10=2+10
4x=12
4x divided by 4 = 12 divided by 4
x= 3