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Llana [10]
3 years ago
13

HELP ASAP i dont know how to do any of this

Mathematics
1 answer:
nadya68 [22]3 years ago
6 0

Answer:

Step-by-step explanation:

Circumference is= to diameter * Pi

6\pi = 6*3.14=18.84\\15\pi=15*3.14=47.1

For the ones that are radius, double it, then pi

21*2\pi = 42\pi =42*3.14=131.88\\6.7*2\pi=13.4\pi =13.4*3.14=47.076

You might be interested in
Find the difference of the two expressions. (23x+2)−(13x−4)
AlekseyPX

Answer:

x = -0.6 or 6/10

Step-by-step explanation:

(23x + 2) = (13x - 4)

23x + 2 - 2 = 23x

13x - 4 - 13x = -4

23x - 13x = 10x

-4 - 2 = -6

10x = -6

divide each by 10

10x / 10 = x

-6 / 10 = -0.6

x = -0.6 or 6/10

3 0
3 years ago
(a) Write down the gradient of the line with equation y = 7 - 4x The line L passes through the points with coordinates (- 3, 1)
lesya [120]

Note: Let us consider, we need to find the gradient of line L.

Given:

The given equation of a line is:

y=7-4x

The line L passes through the points with coordinates (- 3, 1) and (2, - 2).

To find:

The gradient of the given line and the gradient of line L.

Solution:

Slope intercept form of a line is:

y=mx+b                ...(i)

We have,

y=7-4x                   ...(ii)

On comparing (i) and (ii), we get

m=-4

Therefore, the gradient of the given line is -4.

The line L passes through the points with coordinates (- 3, 1) and (2, - 2). So, the gradient of line L is:

m=\dfrac{y_2-y_1}{x_2-x_1}

m=\dfrac{-2-1}{2-(-3)}

m=\dfrac{-3}{2+3}

m=\dfrac{-3}{5}

Therefore, the gradient of the line L is \dfrac{-3}{5}.

6 0
2 years ago
Bryce orders the following items from a catalog. What is the total price he charges to his credit card if the sales tax is 6 per
Mkey [24]
D because added up is 109 times 1.06 = 115.54 + the $5 shipping makes the answer $120.54
3 0
3 years ago
Read 2 more answers
Lg(10x+200)=lg<br><img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20" id="TexFormula1" title=" {x}^{2} " alt=" {x}^{2} "
Oksana_A [137]

Answer: x = {-4, 5}

<u>Step-by-step explanation:</u>

log (10x + 200) = log (x²) + log (10)

log (10x + 200) = log (10x²)

     10x + 200 = 10x²

                   0 = 10x² - 10x - 200

                   0 = x² - x - 20

                   0 = (x - 5)(x + 4)

                   0 = x - 5    0 = x + 4

                  x = 5           x = -4

Check for extraneous solutions:

             10x + 200 > 0                  x² > 0

x = 5      10(5) + 200 > 0               (5)² > 0        both are satisfied

x = -4     10(-4) + 200 > 0             (-4)² > 0        both are satisfied

            Both solutions are valid!

 

8 0
3 years ago
5,499,785- 5,040,629 plz help
almond37 [142]
459,156 is the answer
5 0
3 years ago
Read 2 more answers
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