All categories

3 years ago

out of 30 students surveyed 17 have a dog. Based on these results predict how many of the 300 students in the school have a dog

Mathematics

1 answer:

d1i1m1o1n [39]3 years ago

7 0

17/30•n/300
30n=300(17)
30n=5,100
n= 170

You might be interested in

What is the square root of 5 divided by the square root of 15 and simplify and in fraction form

ozzi

Answer:

$\sqrt{\frac{1}{3} }$

$\frac{\sqrt{3} }{3}$

Step-by-step explanation:

The expression $\frac{\sqrt{5} }{\sqrt{15} }$ can be simplified by first writing the fraction under one single radical instead of two.

$\frac{\sqrt{5} }{\sqrt{15} } = \sqrt{\frac{5}{15} }$

5/15 simplifies because both share the same factor 5.

It becomes $\sqrt{\frac{5}{15} } = \sqrt{\frac{1}{3} }$

This can simplify further by breaking apart the radical.

$\sqrt{\frac{1}{3} } = \frac{\sqrt{1} }{\sqrt{3} } = \frac{1}{\sqrt{3} }$

A radical cannot be left in the denominator, so rationalize it by multiplying by √3 to numerator and denominator.

$\frac{1}{\sqrt{3} } *\frac{\sqrt{3} }{\sqrt{3} } =\frac{\sqrt{3} }{3}$

4 0

2 years ago

In a right angled triangle, the two sides forming a right angle measure 8cm and 6cm. Area of this triangle is

Solnce55 [7]

<h3>Answer: 24 square cm</h3>

Work Shown:

base = 8, height = 6

area = (1/2)*base*height

area = (1/2)*8*6

area = 0.5*8*6

area = 4*6

area = 24

5 0

3 years ago

Read 2 more answers

What is 7 + 8(2r - 9)

Shalnov [3]

7 + 8(2r - 9)

mutiply the bracket by 8

(8)(2r)= 16r

(8)(-9)= -72

7+16r-72

7-72+16r ( rearranging)

answer:

-65+16r or 16r-65

4 0

3 years ago

Read 2 more answers

P is directly proportional to u.

nata0808 [166]

Answer:

?????????????????????????

Step-by-step explanation:

????????????????????????

4 0

2 years ago

Read 2 more answers

Evaluate the numerical expression8×{[(7+4)×2]-[(11-7)×4]}

alina1380 [7]

Answer:

We have:

7 + 4 = 11;

11 - 7 = 4;

11 x 2 = 22;

4 x 4 = 16;

22 - 16 = 6;

Finally, 8 x 6 = 48;

Step-by-step explanation:

3 0

3 years ago

out of 30 students surveyed 17 have a dog. Based on these results predict how many of the 300 students in the school have a dog​

out of 30 students surveyed 17 have a dog. Based on these results predict how many of the 300 students in the school have a dog