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nengliangli523
02.11.2019 •
Mathematics
60 points!
okay so i need some with this assignment. i turned in this assignment last week and my teacher said i did it wrong and she told me to re-do it. so i'm going to insert the questions with the answers i put down that were wrong. can somebody me? 60 points and i'll mark brainliest!
assignment: estimating solutions investigation
below is a piece of a local pizza place menu where jacob works.
large cheese pizza$14.85
large supreme pizza$16.90
cheese sticks$5.99
dessert pizza$6.99
use the information above to answer the following questions.
1. a customer has $75 to spend for a pizza party and knows she needs 3 supreme pizzas. jacob tells her she can also afford to buy 4 dessert pizzas. is this reasonable? justify your response using estimation. if the answer is not reasonable, identify the error and then calculate the correct solution.
the answer i put that was wrong:
if the customer only had $75, the customer would not have enough money to cover the pizzas and the dessert pizzas. the customer needs 3 supreme pizzas which already adds up to $50.70. then if the customer were to buy 4 dessert pizzas, the total would come up to $78.66. therefore, the customer wouldn’t have enough money to cover the order.
2. a family comes in with a coupon for $5 off any purchase and wants to know how much it will cost for 1 large supreme pizza and 1 order of cheese sticks if they use their coupon. jacob says it will be $17.89. is this reasonable? justify your response using estimation. if the answer is not reasonable, identify the error and then calculate the correct solution.
the answer i put that was wrong:
i would say yes the price is reasonable because 1 supreme pizza costs $16.90, and 1 order of cheeses ticks costs $5.99, so without the coupon the total would be $22.89. with the coupon the total would come to $17.89, this is reasonable.
3. a customer calls in a delivery order for 3 large cheese pizzas and 2 dessert pizzas. the customer wants to give a 20% tip to the delivery driver. jacob says that $5 would be about 20%. is this reasonable? justify your response using estimation. if the answer is not reasonable, identify the error and then calculate the correct solution.
the answer i put that was wrong:
this isn’t reasonable at all. with everything that the customer orders the total would come to $58.83. 20% of $58.53 is $11.71. so, if the customer wants to tip 20%, then he should tip the driver $11.71.
4. the largest order last saturday was from a basketball team that ordered 5 large supreme pizzas, 5 large cheese pizzas, 5 orders of cheese sticks and 5 dessert pizzas. jacob said the total was about $225. is this reasonable? justify your response using estimation. if the answer is not reasonable, identify the error and then calculate the correct solution.
the answer i put that was wrong:
this is reasonable because the original total would be $223.65, but if you round it up, it comes to $225.00.
5. adding additional toppings to a large cheese pizza cost $1.39 per topping. the equation 14.85 + 1.39x=20 can be used to determine the number of toppings that can be added to a large cheese pizza for a total of $20. jacob solves the equation and says you can get 4 toppings added if you have $20. is this reasonable? justify your response. if the answer is not reasonable, identify the error and then calculate the correct solution.
the answer i put that was wrong:
14.85 + 1.39x =201.39x = 20 –14.851.39x = 5.151.39 / 1.39 = 5.15 / 1.39x = 3.70
Solved
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Ответ:
The problem is that she is using the word estimate (at least in the first two). So put your calculator away and estimate.
Problem One
3 Supreme Pizzas are roughly 17 dollars each which is 51.00
Now we need to look into 4 desert Pizzas which is 4*7 =28.00
The total is 79 dollars. The estimate says she call only afford 3 desert pizzas.
51+21 = 72 dollars roughly, which is not a bad estimate.
Problem Two
The family comes in wanting 1 Supreme at 17.00 + 6 dollars for the cheese sticks. The total is 23 dollars. When you take off the gift certiciate it comes to 23 - 5 = 18 dollars. So the store is correct. It's close enough.
Comment
The problem is that you are figuring out the exact amount. One of the most valuable lessons you can learn is how to estimate.
Problem 3
3 Large Cheese Pizzas are 3 times 15 = 45 dollars.
2 dessert Pizzas come to 2 * 7 = 14 dollars
The total is 59 dollars Estimate for the total is 60 dollars
20% is about 20/100 = 1/5 of 60 dollars is 12.00
Jacob needs to take this math class if 5 dollars is his answer.
Problem 4
5 supremes are 5 * 17 = 85
5 cheese Pizzas are 5 * 15 = 75
5 Desert Pizzas are 5 * 7 = 35
5 Cheese Sticks = 5 * 6 = 30
Total = 225 You are intended to do this in your head but you can cheat and use your calculator. Anyway, Jacob redeemed himself. His answer is correct.
Problem 5
You should estimate it as
15 dollars for the pizza and 4*1.50 = 15 + 6 = 21.00 It's a bit high. You can do one of two things. You can figure this out exactly or you can drop the number of toppings by one. If you drop by one, you get 19.50 which I don't think an exact answer will improve upon.
In every case, you have not estimated your answer. There are times when exact answers don't give you a quick enough answer.
when you figure our the exact answer for Problem 5 it comes to 20.41. You don't have enough.
Ответ:
orange graph =-2
Blue graph -2 or 2
Step-by-step explanation: