A student thinks the sum of 4.3 and 8.4 is 12.7 because 4+8 is 12 and 3+4 is 7. The student then adds 3.7 and 2.6, then gets 5.13 because 3+2 is 5 and 6+7 is 13. Identify the mistake in the students procedure and explain why the procedure won't always work.

Answers

Answer 1

Answer: The mistake the student made in the second procedure is she tried to solve 3.7+2.6 the same way she solved 4.3+8.4, which that way doesn't always work. You have to understand how decimals work when it comes to adding them. The right way to solve 3.7+2.6 and be sure you are accurate is to line the numbers up. Then add the numbers behind the decimal which is 7+6. That equals 13. So you would out your 3 and carry your 1 over to the number in front of the decimal. So 3+2=5, plus the additional one you had to carry. Your final answer would be 6.3

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Simplify 9 to the second power over 9 to the seventh power.

Answers

9^2 subtract the exponents. 9^-5 can't have that so flip the fraction.
----
9^7

1
--- is the answer
9^5

Answer:9^5

Step-by-step explanation:

You need 2 eggs for a muffin recipe that makes 12 muffins. If you want to make 36 muffins, what should you do?

Answers

Solve:-

36 ÷ 12 = 3
3 batches of 12 muffins each.

2 × 3 = 6
You will need 6 eggs to make 36 muffins, when using 2 eggs per 12 muffins.

CHECK OUR WORK:-

6 / 2 = 3
We were RIGHT!!!!

So, to make 36 muffins you need 6 eggs.

Solve:-

36 ÷ 12 = 3
3 batches of 12 muffins each.

2 × 3 = 6
You will need 6 eggs to make 36 muffins, when using 2 eggs per 12 muffins.

6 / 2 = 3

So, to make 36 muffins you need 6 eggs.

) Aubrey can walk 4 1/2 miles in 1/2 hours. Find the average speed in miles per hour.

Answers

I think the answer is 5 because you add the 1/2 and the other 1/2 leave the for alone that will give you 5Example: 1/2+1/2=1+4=5

Find the constant of variation for the relationship shown in the following table:x 1 2 3 4
y 5 10 15 20

A.1

B.2

C.3

D.5

Answers

The answer is B
because if you cross multiply 1/5 with 2/10 you get 2

Give three possible solutions to: x + 5 < 10

Answers

Answer:

1. $x<5$

Step-by-step explanation:

when i do it .... it keep giving me the same thing.

Answer:

Step-by-step explanation:

These value add up to be less than 10.

The Alan Company bought 80 tickets for a jazz company. After giving away 20 tickets to customers, the company sold the rest to the employees for half of the purchase price. If the company absorbed a $1,000 loss on all tickets , how much did an employee pay for a ticket.

Answers

Each employ paid 166.67 for each ticket

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Expand and simplify (x+2)(x+1)

A bouquet of lilies and tulips has 12 flowers. Lilies cost $3 each, and tulips cost $2 each. The bouquet costs $32. Write and solve a system of linear equations to find the number of lilies and tulips in the bouquet

If a full dose of medicine is 560mg,how much is 80% of a dose

−8x+3≥27 AND−13x+5≥57