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Natali [406]
4 years ago
5

Kate has a coin collection,She keeps 7 of the coins ln a box .Which is only 5% of her entire collection,What is the total number

of coins in Kate’s coin collection?
A 12
B 14
C 120
D 140
Mathematics
1 answer:
Dvinal [7]4 years ago
6 0

Answer:

D

Step-by-step explanation:

This basically means "7 is 5% of what number(total)".

<em>We can directly translate this into algebra:</em>

<u><em>Note: </em></u><em>"is" means "equal"  AND  "of" means "multiplication". Also, let the total be n</em>

<em />

Let's write the equation.

"7 is 5% of what number(total)"

7 = 5% * n

5% means 0.05, so:

7 = 0.05 * n

n = 7/0.05 = 140

Total number of coins is 140

Option D is right.

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One number is five more than another number. If the square of the smaller number is 3 more than 3 times the larger number, what
11111nata11111 [884]

Answer:

6 and 11

Step-by-step explanation:

n1 = n + 5

ns^2 = 3 + 3nb

6^2 = 3 + 3(11)

36 = 3 + 33

11 = 6 + 5

3 0
2 years ago
IN 2013 The number of students in a small school is 284. it is estimated that the student population will increase by 4% every y
Aleks [24]

Answer:

Amount = Initial value × (1 + rate of interest)^years and 374

Step-by-step explanation:

The formula to determine the student population and the estimated student population is given below:

As we know that

Amount = Initial value × (1 + rate of interest)^years

= 284 × (1 + 0.04)^7

= 284 × 1.04^7

= 373.72

= 374

7 0
3 years ago
Which set of ordered pairs and equation for a best fit line represents data from the table?. a. (x1, y1) = (64, 135), (x2, y2) =
Marrrta [24]
Just comparing your (x, y) points to the values on the table, it looks like b) would be the quick answer. Since it states under the table to use average values within each range.
So for x=62 (the weight), we have y=122 (the iron count) which would be the average of the range between 115 and 129.

Similiarly, x=70 corresponds to y=146, which is the average of 139 and 153.
You could take the average values of your highest and lowest iron count ranges compare them to the max-min weight to get your slope. Looks like it would be (155-112)/(73-58)= 43/15= 2.8666 repeating. That would make sense with the slope in the equation listed in b) as well. <span>
</span>
8 0
3 years ago
I"M SO DONE WITH BOTS SOMEBODY PLEASE HELP ME
Mice21 [21]
<h3><u>Answer:</u></h3>
  • Your answer would be "30".
<h3><u>Step-by-step explanation:</u></h3>
  • 2x + 20 = 3x - 10 [Corresponding Angles]
  • => 10 + 20 = 3x - 2x
  • => 30 = x
<h3><u>Conclusion:</u></h3>

Therefore, your answer would be "30".

Hoped this helped.

BrainiacUser1357

5 0
3 years ago
A silversmith combined pure silver that cost $33.48 per ounce with 51 oz of a silver alloy that cost $24.35 per ounce. How many
Pavlova-9 [17]

Answer:

$38.31

Step-by-step explanation:

Given:

Pure silver that cost $33.48 per ounce used to form $24.35 alloy/ounce.

Question asked:

How many ounces of pure silver were used to make an alloy of silver costing $27.87 per ounce?

Solution:

At cost $24.35/ounce, pure silver is mixed = $33.48

At cost $1/ounce, pure silver is mixed = \frac{33.48}{24.35}

At cost $27.87/ounce, pure silver is mixed = \frac{33.48}{24.35}\times 27.87 = \frac{933.08}{24.35}  = 38.31

Thus, $38.31 ounces of pure silver were used to make an alloy of silver costing $27.87 per ounce.

5 0
3 years ago
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