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2 years ago

Amanda's penny bank is 23 full. After she removes 120 pennies, it is 12 full. How many pennies can Amanda's bank hold?

1 answer:

7 0

So if the bank was 2/3 full, and then after the pennies are removed it is 1/2 full, then the volume taken up by those removed pennies is the difference:
(2/3)-(1/2)=(4/6)-(3/6)=1/6

If there are 120 pennies in 1/6 of the bank's volume, then the total can be found by multiplying 120 by 6 (so that (1/6)*6=1 (the total volume))

120*6=720
You can fit 720 pennies in that bank

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Step-by-step explanation:

2x+3>-9 Subtract 3 from both sides of the inequality.

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How many 4 digit multiples can not be divided by 5

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Answer:

1800

Step-by-step explanation:

Let us solve this question by Modular Airthmatic.

Let the lowest 4 digit number be X.

X= 1 (mod 5)

X =2 (mod 5)

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X becomes 6 +25 (2+5 v)=56+125 v .

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125 v=-52 (mod 5)=3 (mod 5)

125 is Modular Inverse of modulo 5

v = 3 (mod 5)

v =3 +5 w where w is any integer.

For lowest 4 digit number, take

w=200

X=1003 : Lowest 4 digit number.

Take w=201

X=208 : Next number.

For 4 digit largest number, take

w=1995

X= 9978 : Largest number.

No. of Numbers =(1995 - 200 )+1=1800 □Ans.

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2 years ago

What is a reasonable estimate for the problem? 3 3/4 x -2/5

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Answer:

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Step-by-step explanation:

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Ms. Zab gave a group of 5 students a total of 18.75 liters of water for a science experiment. If each student in the group used

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Answer: The quantity of the water received by each student = 3.75 liters.

Step-by-step explanation:

Given: Total water = 18.75 liters

Total students =5

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