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kherson [118]
3 years ago
11

What is the area of a circle with a diameter of 21 centimeters?

Mathematics
2 answers:
dexar [7]3 years ago
5 0
The area of a circle with a diameter of twenty-one is roughly 346 or 346.36 to be exact.<span />

- Divide the diameter by two to find the radius.

- Square the radius & Multiply by Pi
sattari [20]3 years ago
4 0
Area of a circle: πr²

Data:
diameter:  21 cm
radius=diameter/2=21 cm/2=10.5 cm

area of this circle: π(10.5 cm)²=110.25π cm²  (≈346.36 cm²)

Answer: area=110.25π cm²
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The slope of the line whose equation is x + y = 6 is
melisa1 [442]

Answer:

y= -x+6

Step-by-step explanation:

The equation was in point slope from, so you had to solve for y using inverse operations. The slope of x is -1 because -x = -1x.


6 0
2 years ago
Which is Bigger y=6x+4, or y=3(x)+ 2
antoniya [11.8K]
Y=6x is bigger because they have the same variables, but the known numbers in the first equation are doubled
5 0
3 years ago
2x+5y=12
anastassius [24]
Y = -3x - 1......so we sub in -3x - 1 in for y in the other equation

2x + 5y = 12
2x + 5(-3x - 1) = 12....now distribute the 5 through the parenthesis
2x - 15x - 5 = 12...add 5 to both sides
2x - 15x = 12 + 5..combine like terms
-13x = 17...divide both sides by -13
x = -17/13
now sub in -17/13 for x in the other equation
y = -3x - 1
y = -3(-17/13) - 1
y = 51/13 - 1
y = 51/13 - 13/13
y = 38/13

so the solution is (-17/13, 38/13)

8 0
3 years ago
7. The store at your school wants to stock T-shirts that come in five sizes (small, medium, large, XL, XXL) and in two colors (o
kenny6666 [7]

Answer:

a. 10

b. 0.1

Step-by-step explanation:

a. The t-shirts comes in 5 sizes (Small,medium,large, extra large and extra extra large) and two colors orange and black. The total different type of shirts are 5*2=10 different type of t-shirts.Also if we make sample space of all shirts we can assess the total different type of t-shirts. sample space=S={small orange,medium orange,large orange,XL orange,XXL orange,small black,medium black,large black,XL black,XXL black}. n(S)=total different type of shirts=10.

b. P( large orange t-shirt)=n(large orange t-shirt)/n(S)=1/10=0.10.

3 0
3 years ago
Sam has $65 to spend on clothes. He wants to buy a pair of jeans for $29 and spend the rest on t-shirts. Each t-shirt costs $9.
Alekssandra [29.7K]

money >= jeans + tshirts

65 >= 29 + 9* number of shirts

subtract 29 from each side

36> =9 *number of shirts

divide by 9 on each side

4 > =number of shirts

He can buy 4 or less shirts

Choice A


5 0
3 years ago
Read 2 more answers
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