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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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When to fractions are between 0 1/2 how do you know which fraction is greater explain
shepuryov [24]
By creating a common denominator, you can compare different numbers to the same ratio. For example:
Take 2/3 and 3/4
Now 3/4 is the same as 9/12
And 2/3 is the same as 8/12
Now that they have the same denominator, you can tell that 9/12 is clearly greater than 8/12, meaning 3/4 is greater than 2/3.
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3 years ago
Express decimal as a fraction 8.25
aksik [14]

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33/4

Step-by-step explanation:

3 0
3 years ago
Find the side length of X
7nadin3 [17]

Answer:

7√3

Step-by-step explanation:

We can use pythagoreans theorem to solve this

Since, we know one side, and the hypotenuse, we can solve for the other side.  

Pythagoreans theorem: a²+b²=c²

Where a and b are two sides, and c is the hypotenuse (the side opposite of the right angle)

In this triangle, 7 is the side, and 14 is the hypotenuse.

I will plug in the values into pythagoreans theorem, and then simplify:

a^{2}+b^{2} =c^{2} \\\\7^{2} +x^{2} =14^{2} \\\\49+x^{2} =196\\\\x^{2} =147\\\\x=\sqrt{147} \\\\x=\sqrt{49*3 }\\\\ x=\sqrt{7^{2} *3 }\\\\x=7\sqrt{3}

So x = 7√3

6 0
3 years ago
Please solve the following complex number system ASAP, show work and please simplify fully.
Illusion [34]

Answer:

x= 16±√-64 over 2

Step-by-step explanation:

x= -(-16)±√(-16)²-4×1×80 over 2×1

x= 16±√256-320 over 2

x= 16±√-64 over 2

can also be represented with all real numbers.

7 0
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Given that ∠ABC ≅ ∠DBE, which statement must be true?
Gala2k [10]
Line Segment AB<span> ≅ Line Segment DB </span>
6 0
4 years ago
Read 2 more answers
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