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Aleonysh [2.5K]
1 year ago
11

If you know the diameter of a circle,

Mathematics
1 answer:
arsen [322]1 year ago
6 0

Step-by-step explanation:

a. Area of a circle = πr², where r means radius.

Step 1: converted diameter to radius.

diameter = 2 radius

In other way of writing, radius = \frac{1}{2} diameter.

Step 2: substitute radius into the formula.

Area of a circle = π(\frac{1}{2}d)²

Step 3: substitute π into the formula.

some question is given the value of π), if not substitute 3.14 for π.

Area of a circle = 3.14(\frac{1}{2}d)²

Step 4: substitute d into the formula, then we can solve its area.

b. a. Circumference of a circle = 2πr, where r means radius.

Step 1: converted diameter to radius.

diameter = 2 radius

In other way of writing, radius = \frac{1}{2} diameter.

Step 2: substitute radius into the formula.

C = 2π(\frac{1}{2}d)

Step 3: substitute π into the formula.

some question is given the value of π), if not substitute 3.14 for π.

C = 2(3.14)(\frac{1}{2}d)

Step 4: substitute d into the formula, then we can solve its circumference.

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6-4x=(3-x)<br> A) -2<br> B) 2<br> C) all real, numbers<br> D) no solution
Semmy [17]
6 - 4x = (3 - x)

Subtract 6 from both sides, as well as adding x to both sides.

-4x + x = 3 - 6

Add like terms.

-3x = -3

Divide both sides by -3.

x = 1

So, your answer is c) All real, numbers because all of the other answer choices are wrong. 

We know this because a) and b) are incorrect. To know if they are incorrect, you just plug in the numbers. When 2 and -2 are plugged into the equation, it is incorrect. So, you solve the equation, and you now know that it is not D) because there is a solution. 

So, once again, your answer is C.

~Hope I helped!~

6 0
2 years ago
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Please help! giving brainliest.
Advocard [28]

Answer:

99.225

Step-by-step explanation:

10×3.15 is 31.5

31.5 squared is 99.225

Hope this helps!

7 0
2 years ago
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Hi! Could you help me me out and solve these two problems? "eight less than the product of seven and xxx", and "the sum of six a
Ann [662]

Given:

The given statement are:

a. Eight less than the product of seven and x.

b. The sum of six and the product of three and d.

To find:

The expression for the given statements.

Solution:

a.

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Eight less than the product of seven and x is 7x - 8.

Therefore, the required expression for the statement "Eight less than the product of seven and x" is 7x-8.

b.

Product of 3 and d is 3×d = 3d.

The sum of six and the product of three and d is 6+3d.

Therefore, the required expression for the statement "The sum of six and the product of three and d" is 6+3d.

3 0
2 years ago
Which is the best estimate for the average rate of change for the quadratic function graph on the interval 4 ≤ x ≤ 8?
alukav5142 [94]
I think the answer is D, sorry if I'm wrong
4 0
2 years ago
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Work out m and c for the line: y = 6 − x
Reika [66]

Put this into slope intercept form.

  y = 6 - x      becomes     y = -x + 6

"m" is the coefficient on x:   -1

"c" is the number without the x:   6

5 0
2 years ago
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