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2 years ago

What is the result when the number 80 is decreased by 32%?

Mathematics

2 answers:

gayaneshka [121]2 years ago

4 0

Answer: 54.4

Step-by-step explanation:

Subtract 32% from a 100% then multiply it by 80 to get the results.

100% - 32% = 68%

68% * 80 = 54.4

Goryan [66]2 years ago

3 0

Answer:

54.4

Step-by-step explanation:

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How can you use a 1/8 size measuring cup to measure 9/12 of corn syrup

algol13

(9/12) / (1/8) =
3/4 * 8 =
24/4 =
6 <=== u would use 6 one-eights size measuring cups to equal 9/12 of corn syrup

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3 years ago

Find the length to the nearest centimeter of the diagonal of a square 30 cm. on a side

tiny-mole [99]

Answer:

42 cm.

Step-by-step explanation:

Please find the attachment.

Let x be the length of diagonal of the square.

We have been given that length of each side of a square is 30 cm. We are asked to find the length of the diagonal of square to the nearest centimeter.

We can see from our diagram that triangle AC is the diagonal of our square.

Since all the interior angles of a square are right angles or equal to 90 degrees, so we will use Pythagoras theorem to find the length of diagonal.

$AC^2=AD^2+DC^2$

Upon substituting our given values in above formula we will get,

$x^2=(30\text{ cm})^2+(30\text{ cm})^2$

$x^2=900\text{ cm}^2+900\text{ cm}^2$

$x^2=1800\text{ cm}^2$

Let us take square root of both sides of our equation.

$x=\sqrt{1800\text{ cm}^2}$

$x=42.4264\text{ cm}\approx 42\text{ cm}$

Therefore, the length of diagonal of our given square is 42 cm.

8 0

3 years ago

Solve: 2x2-x = 21 {-7/2,3} {-3, 7/2}

Sergio039 [100]

Answer:

The answer is (-3,7/2)

Step-by-step explanation:

$2 {x}^{2} - x - 21 = 0 \\ (2x - 7)(x + 3) = 0 \\ 2x - 7 = 0 \: \: \: or \: \: x + 3 = 0 \\ x = \frac{7}{2} \: \: and \: x = - 3$

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3 years ago

Given the volume of a sphere is 268.1cm^3, what is she surface area?

EastWind [94]

SA=201.7cm^2
I used the equation
SA=pi^1/3(6*V)^2/3 in case you have any more questions like this

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3 years ago

If cosu = 30/34 find sin2u

Tomtit [17]

Answer:

es tal vez otra vez se repite la pregunta

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2 years ago