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3 years ago

There are 75 students in a speech contest. Yesterday, 2/5 of them gave their speeches. Today, 1/3

Mathematics

1 answer:

Trava [24]3 years ago

4 0

<h3>Answer: 30</h3>

Work Shown:

2/5 of 75 = (2/5)*75 = 0.4*75 = 30

Yesterday 30 people gave speeches. There are 75-30 = 45 people left.

1/3 of 45 = (1/3)*45 = 15

Then another 15 people gave speeches today. So there are 45-15 = 30 people who haven't given their speeches yet.

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Giving BRAINLIEST for correct awnser! Factor the expression below.

melomori [17]

Answer:

C. 6a + 5b

Step-by-step explanation:

36a^2-25b^2

Rewriting as

(6a)^2 - (5b)^2

We know this is the difference of squares

(x^2 -y^2) = (x-y)(x+y)

(6a - 5b) (6a+5b)

6 0

3 years ago

Read 2 more answers

398.574986215 to the nearest ten-thousandth.

Julli [10]

Answer: $398.5750$

Step-by-step explanation:

It is important to remember that the fourth digit after the decimal point is in the ten-thousandth place.

Then, given the following number:

$398.574986215$

You can follow these steps in order ti round it to the nearest ten-thousandth:

1. You can identify that the digit in the ten-thousandth place is:

$9$

2. Identify the digit to the right of $9$ . This is:

$8$

3. Since:

$8>5$

You must round up. Increase the digit $9$ by 1. (Notice that $9+1=10$ , then the digit to the left of $9$ increases by 1 too). Then:

$398.5750$

3 0

3 years ago

How do you find the radius of a cylinder when you only know the surface area?

Paha777 [63]

The surface area of a cylinder with circular bases of radius <em>r</em> and height <em>h</em> is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:

If you know the height <em>h</em>, then you can solve the quadratic equation for <em>r</em>.

7 0

2 years ago

Question 5 of 10

Lady_Fox [76]

Answer:

______

x = − 0. 142857

Step-by-step explanation:

7 0

2 years ago

Please please help me. i’ll literally send you money. i need to pass please help

mihalych1998 [28]

<h3>Answer: Approximately 6.4 units</h3>

==================================================

Explanation:

The origin is the point (0,0)

Use the distance formula to find the distance from (0, 0) to (4, -5)

Let

$(x_1,y_1) = (0,0)\\\\(x_2,y_2) = (4,-5)\\\\$

be our two points. Plug those values into the distance formula below and use a calculator to compute

$d = \sqrt{\left(x_1-x_2\right)^2+\left(y_1-y_2\right)^2}\\\\d = \sqrt{\left(0-4\right)^2+\left(0-(-5)\right)^2}\\\\d = \sqrt{\left(0-4\right)^2+\left(0+5\right)^2}\\\\d = \sqrt{\left(-4\right)^2+\left(5\right)^2}\\\\d = \sqrt{16+25}\\\\d = \sqrt{41} \ \text{ exact distance}\\\\d \approx 6.40312 \ \text{ approximate distance}\\\\d \approx 6.4\\\\$

The distance between the two points (0,0) and (4,-5) is approximately 6.4 units.

6 0

3 years ago