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2 years ago

Suppose you plan to purchase 10 items that each cost 4.45. Explain how you use mental math to to find the cost of 10 items

Mathematics

1 answer:

Over [174]2 years ago

5 0

Answer:

44.5

Step-by-step explanation:

Multiplying 10 with 4.45 using mental math to find the total cost of 10 items. first multiply 0 with 445 which will yield 000, then multiply 1 with 445 which will yield 445 now put a cross beneath last 0 in 000 and write 445 before it and perform addition which will yield 4450 as the decimal was initially was before the second last digit in 4.45, place it accordingly in 4450 which will yield 44.5.

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A collector has 120 movie posters and 100 band posters. She wants

Juliette [100K]

Answer:

She should sell 20 band posters from total 80 to keep the maintain the same ratio.

Step-by-step explanation:

The total number of movie posters collector has = 120

The total number of band posters collector has = 80

The current ratio of movie poster : band poster = 120 : 100

or, reducing the ratio further, we get

ratio of movie poster : band poster = 6 : 5 ...... (1)

Now, the number of posters she wants to sell = 24

So, the remaining movie poster left = 120 - 24 = 96

Let us assume she sells m band posters to keep the ratio equal.

So, the number of band posters she is left with = 100 - m

⇒The ratio of movie poster left : band poster left = 96 : 100 - m .. (2)

Now here as the ratio remains same after selling m band posters, so

$\frac{6}{5} = \frac{96}{100 - m} \\\implies 100 - m = 96 \times\frac{5}{6} = 80\\or, 100 - 80 = m\\\implies m= 20$

or, m = 20

Hence, she should sell 20 band posters from total 80 to keep the maintain the same ratio.

7 0

3 years ago

Find the inverse function of y=8x.

Zarrin [17]

Answer:

x/8

Step-by-step explanation:

how I see the problem I just put the 1 over the 8 because you can't really do anything else with the problem

4 0

2 years ago

jan spent 45 for two shirts and 60 for a pair of jeans. she has 7 left over. how much money did jan take shopping

Evgen [1.6K]

I hope this is in dollars. Remember to always put a label on a number. Who knows, maybe this person paid in bananas.
$45+$60+$7= $112.

8 0

2 years ago

U + -5/6 = -1/3 solve for u

Phoenix [80]

Move all terms not containing U to the right side of the equation.

Exact Form:

U = 1/2

Decimal Form:

U = 0.5

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2 years ago

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Marina86 [1]

Answer is 8.5% ......

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3 years ago

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