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melamori03 [73]
3 years ago
11

45 children attend preschool the number of two-year-olds is 1/2 the number of three-year-olds the number for your old is the sam

e as the number of three-year-olds
Mathematics
1 answer:
Mkey [24]3 years ago
6 0
There are 9 two-year-olds and 18 each of 3 and 4 year olds.

To solve this we could write and solve the equation below, letting x be the number of 3 and 4 year olds.

x/2 + x + x = 45
x + 2x + 2x = 90
5x = 90
x = 18

From here, we just divide 18 by 2 to get the number of 2 year olds.
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Sonia received a statement on her Certificate of Deposit showing that her investment had returned $4,320 over its life. If the C
bija089 [108]

Answer:

The correct answer is -7.5 years.

Step-by-step explanation:

Given:

Principle amount = 12000

Interest = 4320

time = ?

rate = 4.8 simple interest

Solution:

We know that simple Interest I = (P*t*r)/100

then t = I*100/p*r

putting values in formula:

t = 4320*100/4.8*12000

= 432000/57,600

= 7.5 years

6 0
3 years ago
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3 years ago
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Which of the following represents a relation that is NOT a function? A. X 7 -5 10 -7 Y 34 32 40 34 B. X -7 -5 -7 2 Y 34 32 40 34
Nostrana [21]
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8 0
3 years ago
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6 0
3 years ago
Please help me with this problem!
pantera1 [17]
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17/100x8000= 1360

1360+1200 = 2560

18000 - 2560 = $15,440 (final cost)

5 0
3 years ago
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