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2 years ago

If 55% of a number is 143 and 45% of the same number is 117, find 100% of that number.

Mathematics

1 answer:

natita [175]2 years ago

6 0

260

143 divided by .55=260
117 divided by .45=260
260 times .45=117
260 times .55=143

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Some one cans help me to find the answer about the whole shape and tell me how do you get the answer step by step please I need

Naya [18.7K]

First let’s call the square shape A and the rectangle shape B.

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To find the area of shape B you do 40 x 24 = 960cm squared

To find the total area you just add the two areas together
576 + 960 = 1536cm squared

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3 years ago

If an open box has a square base and a volume of 115 in.3 and is constructed from a tin sheet, find the dimensions of the box, a

Karolina [17]

Let h = height of the box,
x = side length of the base.

Volume of the box is $V=x^{2} h = 115$ .
So $h = \frac{115}{ x^{2} }$

Surface area of a box is S = 2(Width • Length + Length • Height + Height • Width).
So surface area of the box is
$S = 2( x^{2} + hx + hx) \\ = 2 x^{2} + 4hx \\ = 2 x^{2} + 4( \frac{115}{ x^{2} } )x$
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The surface are is supposed to be the minimum. So we'll need to find the first derivative of the surface area function and set it to zero.

$S' = 4x- \frac{460}{ x^{2} } = 0$
$4x = \frac{460}{ x^{2} } \\ 4x^{3} = 460 \\ x^{3} = 115 \\ x = \sqrt[3]{115} = 4.86$
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3 years ago

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Alexander is raking leaves to earn money to buy a bicycle that costs $300 including tax.

zheka24 [161]

Answer:

19 yards

Step-by-step explanation:

75 - 50 = 25

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3 years ago

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svet-max [94.6K]

Answer:

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Step-by-step explanation:

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2 years ago

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Ivanshal [37]

Answer:

Batch 1:- Red 2 ounces Blue 1 1/2 ounces

Batch 2:- Red 3 White 3 3/4 ounces.

Batch 3:- White 4 1/6 Blue 2 1/2 ounces.

Step-by-step explanation:

Batch 1

Amount of the white paint = 5/12 of the batch = 2 1/2 or 5/2 ounces.

5/12 is equivalent to 5/2 ounces of white paint.

1/12 ......................... 5/2 / 5 = 5/10 = 1/2 ounce.

Red paint.

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Similarly to the above amount of blue paint = 1/4 =3/12

= 3 * 1/2 = 1 1/2 ounces of blue paint.

Batch 2.

We can calculate the missing quantities in a similar way to Batch 1.

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1 /12 =

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So 1/12 = 10/3 / 4 = 10/12 = 5/6 ounces.

White paint = 5/6 * 5 = 4 1/6 ounces.

Blue paint = 5/6 * 3 = 15/6 = 2 1/2 ounces.

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3 years ago