(just for fun) If You Have all of the answers and if all of them is Correct, Ill mark Brainliest!! Good Luck And Enjoy!:>

1) 31.4                                        2) 162

3) 621                                        4) 4.80

5) 2                                            6) 1.25

7) 330                                        8) 5560

9) 8.6                                        10) 96.7

11) 90                                        12) 2800

13) 1.81                                      14) 92

15) 51.0                                     16) 64.8

17) 830                                      18)8.40

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15