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2 years ago

12

Find the circumference of the circle. Round your answer to two decimal places, if necessary.

1 answer:

Artist 52 [7]2 years ago

4 0

Answer:

56.55mm

Step-by-step explanation:

circumference = 2r*π

9mm*2=18

circumference = 18π

18π=56.5487

18π=56.55

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Write the formula for the parabola that has x- intercepts (3,0) and (8,0), and y- intercept (0,−2)

alexira [117]

Answer: $x^2-5x=-12(y+2)$

Step-by-step explanation:

Given

Parabola has x-intercept has $(3,0)$ and $(8,0)$

and Y-intercept as $(0,-2)$

Now the general equation of parabola is

$y=ax^2+bx+c\quad \ldots(i)$

Substitute $(0,-2)$ in $(i)$ we get

$-2=c$

Now substitute $(3,0)$ in equation $(i)$

$0=a(3)^2+3b-2\quad \ldots(ii)$

Now substitute $(8,0)$ in equation $(i)$

$0=a(8)^2+8b-2\quad \ldots(iii)$

Solving $(ii)$ and $(iii)$ we get

$a=\frac{-1}{12}\ \text{and}\ b=\frac{5}{12}$

therefore

$y=\frac{-x^2}{12}+\frac{5x}{12}-2$

$12y=-x^2+5x-24$

5 0

3 years ago

Please solve this fast late night homework session and I need to get as much done as possible...

aksik [14]

Answer:

-4

Step-by-step explanation:

4x+3y=-1

3x + y=-7

Solve for Y

3x+y=-7

-3x. -3x

y= -3x - 7

Plug in Y into the top equation

4x + 3 (-3x - 7) = -1

Distribute the Parenthesis

4x -9x-21=-1

Combine Like terms

-5x = 20

Divide by -5 on both sides

20/-5

x = -4

7 0

3 years ago

Which expression could be substituted for y in the second equation to find the value of x?

AlexFokin [52]

Answer:

x = 31 /4 , y = −11 /2

8 0

2 years ago

A system of equations is shown. 3x+4y=30 3x+5y=33. What is the value of y in the solution to the system of equations

Yuliya22 [10]

Answer: y Is equal to 3 And x Is equal to 6

4 0

3 years ago

Read 2 more answers

Convert 7 pounds 3 ounces to kilograms.

Cerrena [4.2K]

Answer:

3.3

Step-by-step explanation:

7lb 3oz

3oz/16oz=.1875lb

7lb+.1875lb=7.1875lb

7.1875lb/2.2kg=3.27kg

8 0

2 years ago