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3 years ago

If 200 students were

Mathematics

2 answers:

Marat540 [252]3 years ago

8 0

Answer:

90 Students

Step-by-step explanation:

First do 45 divided by 100 to get 0.45

Secondly do 0.45 times 200 to get 90

Pachacha [2.7K]3 years ago

4 0

Answer:90

Step-by-step explanation:

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What is the area of this triangle ?

oee [108]

Answer:

Area of triangle is 9.88 units^2

Step-by-step explanation:

We need to find the area of triangle

Given E(5,1), F(0,4), D(0,8)

We will use formula:

$Area\,\,of\,\,triangle =\sqrt{s(s-a)(s-b)s-c)} \\where\,\, s = \frac{a+b+c}{2}$

We need to find the lengths of side DE, EF and FD

Length of side DE = a = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$

Length of side DE = a = $=\sqrt{(5-0)^2+(1-8)^2}\\=\sqrt{(5)^2+(-7)^2}\\=\sqrt{25+49}\\=\sqrt{74}\\=8.60$

Length of side EF = b = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$

Length of side EF = b = $=\sqrt{(0-5)^2+(4-1)^2}\\=\sqrt{(-5)^2+(3)^2}\\=\sqrt{25+9}\\=\sqrt{34}\\=5.8$

Length of side FD = c = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$

Length of side FD = c = $=\sqrt{(0-0)^2+(8-4)^2}\\=\sqrt{(0)^2+(4)^2}\\=\sqrt{0+16}\\=\sqrt{16}\\=4$

so, a= 8.60, b= 5.8 and c = 4

s = a+b+c/2

s= 8.6+5.8+4/2

s= 9.2

Area of triangle= $=\sqrt{s(s-a)(s-b)s-c)}\\=\sqrt{9.2(9.2-8.6)(9.2-5.8)(9.2-4)}\\=\sqrt{9.2(0.6)(3.4)(5.2)}\\=\sqrt{97.5936}\\=9.88$

So, area of triangle is 9.88 units^2

4 0

4 years ago

12) Perry worked 3 hours at Pet Smart on Saturday. He gets paid an hourly rate. He got

Sloan [31]

Answer:

$8 per hours

Step-by-step explanation:

4 0

3 years ago

Alicia had - $11.00 in her

lana [24]

Answer:

$42

Step-by-step explanation:

It's $42 because 11+44.50 is 54.50 and then you take out 6.25 twice because it's her and one friend to get 42 dollars. Hope this helps!

7 0

2 years ago

The circumference of a circle is 64. What is the radius of the circle?

denis-greek [22]

The radius of the circle would be 10.19 I hope this helped!! :)

4 0

3 years ago

I will give brainliest to the person who does all ten problems first

Anastasy [175]

Answer:

1) 5p+10-p

4p+10

2) 8h+12h-18

20h-18

3) 4x+32+9x

13x+32

4) 6y+8+9

6y+17

5)9x+12x+18

21x+18

6) 9m+9+2m

11m+9

7) 2r+18-6

2r+12

8) 15d+8

9) 8m+8+3m

11m+8

10) 5y+20+10y

15y+20

3 0

3 years ago