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2 years ago

The ratio of boys to girls in a classroom is 4 : 5. What is the meaning of this ratio?

Mathematics

1 answer:

vitfil [10]2 years ago

6 0

Answer:

there are 4 boys for every 5 girls.

Step-by-step explanation:

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What is the LCD for ?11/20 31/45 315 105 66 945

Mnenie [13.5K]

None of these are choices, because in order to make 20ths equal a 45th, it was to end in a 20,40,60,80, or ending in 00.

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2 years ago

Question 1: find the volume of a cube whose total surface area is 486cm^2

lapo4ka [179]

<h3>The volume of cube is 729 cubic centimeter</h3>

Solution:

The surface area of cube is given as:

$Surface\ area = 6a^2$

Where, "a" is the length of side of cube

Given that, surface area = 486 square centimeter

$486 = 6a^2\\\\a^2 = \frac{486}{6}\\\\a^2 = 81\\\\a = 9$

Find the volume of cube:

$volume\ of\ cube = a^3\\\\volume\ of\ cube = 9^3\\\\volume\ of\ cube = 9 \times 9 \times 9\\\\volume\ of\ cube = 729$

Thus volume of cube is 729 cubic centimeter

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2 years ago

Which graph represents a function that is decreasing at a nonconstant rate?

Tasya [4]

Answer: C

since the line isn't straight, the slope/function is decreasing but not at a constant rate

3 0

2 years ago

Simplify <img src="https://tex.z-dn.net/?f=5%20%7B%20%7D%5E%7B2%7D%20%20-%204%20%7B%7D%5E%7B2%7D%20%20%3D%20" id="TexFormula

garri49 [273]

5 · 5 - 4 · 4 = 9 sorry if I'm wrong
the dots mean to multiply

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2 years ago

A jewelry store purchases necklaces for n dollars each. The necklaces are then marked up by 20%, and costumers are charged 5% sa

Aleksandr [31]

Answer:

Step-by-step explanation:

Cost price = $n

Mark up price = selling price- cost price

= (20% × $n)

Selling price = $n + (20% × $n)

Sales tax = 5% × ($n + (20% × $n))

Total cost = selling price + sales tax

Total cost = $n + (20% × $n) + 5% × $n + (20% × $n)

= 1.2 × $n + 0.06 × $n

= 1.26 × $n.

8 0

2 years ago

The ratio of boys to girls in a classroom is 4 : 5. What is the meaning of this ratio? ​

The ratio of boys to girls in a classroom is 4 : 5. What is the meaning of this ratio?