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arsen [322]
3 years ago
13

Please provide step by step explanation thanks

Mathematics
2 answers:
Romashka [77]3 years ago
6 0

Answer:

504

Step-by-step explanation:80/100 multiplied by 630

shepuryov [24]3 years ago
3 0

Answer:

Step-by-step explanation:

No. of students who can swim = 80% of 630

=\frac{80}{100}*630=8*63=504

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I need this nowweeee
marissa [1.9K]

Answer:

27/40

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
On his last test Julie stated that the point (-3 ,4) was a solution to the system of equations below explain whether she was cor
Mila [183]

Answer:

<em>(-3/5, 29/5) </em>

Step-by-step explanation:

Given the simultaneous equation;

-3x+4y=25...... 1

y= -3x+4 ..... 2

We are to confirm if (-3, 4) is the solution to the equations;

Substitute equation 2 into 1;

From 1;

-3x+4y=25

-3x + 4(-3x+4) = 25

-3x -12x + 16 = 25

-15x = 25 - 16

-15x = 9

x = -9/15

x = -3/5

Substitute x = -3/5 into equation 2 to get y;

From 2;

y= -3x+4

y = -3(-3/5)+4

y = 9/5 + 4

Find the LCM

y = (9+20)/5

y = 29/5

<em>Hence the solution to the system of equation is (-3/5, 29/5) hereby falsifying Julie's solution.</em>

4 0
3 years ago
Solve this problem please
sasho [114]
1.0465 is what I got.
7 0
3 years ago
Read 2 more answers
What is the average rate of change for the sequence shown below? (-.5, 2.5), (0,3. (.5, 3.5). (1,4)
zhannawk [14.2K]

Answer:

The average rate of change for this sequence is 1

Step-by-step explanation:

The average rate of change is calculated as the slope of the line joining the end points of the sequence.

In this case the end points are;

(-.5, 2.5) and (1,4)

We simply calculate the slope using the gradient formula;

Change in y / change in x

(4 - 2.5)/(1 - -0.5) = 1

7 0
3 years ago
Read 2 more answers
​If Alfie tosses the paper cup more times, what is the expected ​number of times that the cup will land on its side?
IRINA_888 [86]

Question:

Alfie tossed a paper cup in the air 150 times and recorded the side it landed on.

     Right side up = 60         Upside down = 53             Side = 37

If Alfie tosses the paper cup 100 more times what is the expected number of times the cup will land on its side?

 

Answer:

The expected number of times the cup will land on its side is 25 times

Step-by-step explanation:

Given

Right = 60

Upside\ down = 53

Side = 37

Required

First, we calculate the probability of landing on side

P(Side) = \frac{n(Side)}{Total}

P(Side) = \frac{37}{150}

P(Side) = 0.247

Next, we calculate the expected value; E(x) using:

E(x) = n * P(x)

When tossed 100  more times:

n = 100 and P(x) = P(Side) = 0.247

So:

E(x) = 100 * 0.247

E(x) = 24.7

E(x) = 25 --- approximated

<em>Hence, it is expected that it will land on its side 25 times</em>

3 0
3 years ago
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