Find the circumference of this circle using 3 for T. C~[?] 15 C = 27Tr

Mathematics

2 answers:

Allushta [10]3 years ago

8 0

Answer: 90

Step-by-step explanation:

c = 2πr

r = 15

d = 30

30π = 90

gogolik [260]3 years ago

6 0

Answer:

C≈90

Step-by-step explanation:

remember circumference formula

$\displaystyle C = 2\pi r$

given that,r=15 thus substitute:

$\displaystyle C = 2\pi .15$

simplify mutilation:

$\displaystyle C = 30\pi$

substitute the given value of π:

$\displaystyle C = 30.3$

simplify multiplication:

$\displaystyle C = 90$

and we are done!

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Solve for the value of z: 200/25 = z/2

ad-work [718]

Answer:

z = 16

Step-by-step explanation:

Given

$\frac{200}{25}$ = $\frac{z}{2}$ , that is

8 = $\frac{z}{2}$

Multiply both sides by 2 to clear the fraction

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7 0

3 years ago

Solve the system of equations by graphing. Check your solution. 5x+y=14 2x-y=7

Fudgin [204]

ANSWER

(3,-1)

EXPLANATION

The given system of equations is :

5x+y=14

2x-y=7

For the first equation when x=0,

5(0)+y=14

y=14

The y-intercept is (0,14).

When y=0, 5x+0=14

$x = \frac{14}{5} = 2 .8$

The x-intercept is (2.8,0).

We plot the intercepts and draw a straight line through them to obtain the graph of 5x+y=14 as shown in the attachment.

We repeat the same process for the second equation 2x-y=7.

The intercepts are (0,-7) and (3.5,0)

The solution to the system is the point of intersection of the two straight lines.

The two straight lines intersected at

(3,-1)

Hence x=2, y=-1