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3 years ago

14

Of the 520 students participating in a chess tournament, 35% were male. How many females were in the tournament?

2 answers:

elena55 [62]3 years ago

8 0

Answer:

182

Step-by-step explanation:

take 520 and multiply by 0.35

choli [55]3 years ago

3 0

Step-by-step explanation:

100% = 520

35% = X(less)

35×520/100% = x

182 = number of male

Therefore number of female

= 520-182

= 338

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Find x so that b ll e??????

tekilochka [14]

x=6

(6x+4) = (8x-8)

∠3 and ∠6 have to be equal since they are opposite interior angles (these angles are always equal to each other). Opposite interior angles prove that two lines are parallel if they are equal, so you just set them equal to each other and solve for x.

(6x+4) = (8x-8)

-6x -6x

4 = (2x-8)

+8 +8

12 = 2x

/2 /2

6 = x

CHECK

(6x+4) = (8x-8)

(6[6]+4) = (8[6]-8)

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2 years ago

A 15ftX20ft room has a 6ft diameter circular rug in it. How much of the flood is not covered by the rug?

Luda [366]

Answer:

There are 271.74 ft^2 not covered by the rug

The percentage not covered by the rug is 90.58%

Step-by-step explanation:

step 1

Find out the area of the room

The area of the rectangular room is

$A=(15)(20)=300\ ft^2$

step 2

Find out the area of the circular rug

The area of the circle is

$A=\pi r^{2}$

we have

$\pi =3.14$

$r=6/2=3\ ft$ ----> the radius is half the diameter

substitute

$A=(3.14)(3)^{2}$

$A=28.26\ ft^{2}$

step 3

Find out what percentage of the room is not covered by the rug

we know that

300 ft^2 represent the 100%

so

using proportion

Find out what percentage represent the difference (300-28.26)=271.74 ft^2

Let

x ----> the percentage not covered by the rug

$\frac{300}{100\%}=\frac{271.74}{x}\\\\x=100(271.74)/300\\\\x=90.58\%$

Convert to fraction form

$90.58\%=\frac{90.58}{100}$

Simplify

$\frac{4,529}{5,000}$

therefore

There are 271.74 ft^2 not covered by the rug

The percentage not covered by the rug is 90.58%

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