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2 years ago

The perimeter of a quadrant of a circle is 37.5 cm. Find the area of the circle. (in cm square)

Mathematics

1 answer:

Irina18 [472]2 years ago

4 0

Answer:

the answer isA≈111.91cm²

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THIS IS FUNNY

yaroslaw [1]

Answer:

thats funny lol :)

Step-by-step explanation:

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2 years ago

The perimeter of a rectangle is 42 inches, and its area is 110 square inches. find the length and width of the rectangle.

lorasvet [3.4K]

$p = 2w + 2l$ $p = 42$
$a = l * w$ $a = 108$

You want to make either the length or width variable (I chose the width variable to be by itself. It doesn't matter) by itself by:

Divide both sides by 2.
(p) ÷ 2 = (2w + 2l) ÷ 2
$2's$ $cancel$ $out$
$\frac{p}{2} = w + l$

Subtract both sides by either length or width depending on what variable you chose to make by itself (in this case I subtracted the length variable because I wanted the width variable by itself).
$\frac{p}{2} - l = w + l - l$
$l's$ $cancel$ $out$
p/2 - l = w

$a = l * w$

You replace w with the equation above p/2 - l = w
$a = l( \frac{p}{2} - l)$

Multiply out the L.
$a = \frac{p}{2}l - l^{2}$

Plug in all your numbers a = 110 and p = 42
$110 = \frac{42}{2}l - l^{2}$
$110 = 21l - l^{2$

Move everything to the left side so $l^{2}$ would be positive (makes the equation easier when $l^{2}$ is positive).
$l^{2} - 21l + 110 = 0$

Factor.
$(l -10)(l-11) = 0$

Make each parenthesis set equal to 0.
$l-11=0$ $l-10=0$

Add.
$l = 11$ $l = 10$

By doing this you solve for both the width and length so the answer is:
w = 11 L = 10

8 0

3 years ago

She uses a scale of 1 centimeter to 6 inches<br> the scale drawing of the front face is

Anastasy [175]

Answer:

change inches into centimeter and then divide it

hope this help

4 0

3 years ago

The number of dogs compared to the number of cats owned by the residents of an apartment complex is represented by the model bel

pochemuha

Answer:

I believe your asking for the ratio of dogs to cats. Your ratio would be 6:1 and your ratio for cats to dogs is 1:6 Hope it helps.

4 0

2 years ago

The ratio of people who walk home from school to people who ride the bus home is 2 : 7 2 : 7 . The number of bus riders is how m

SashulF [63]

Ratio walkers to riders 2:7

7/2=3.5

The bus riders are 3.5 times more than the riders

8 0

2 years ago