TC1: Cho chóp S ABCD . , điểm M SA  , N SB  , P SC  sao cho 1 4
SM
SA
 ,
2
3
SN
SB
 ,

1
2
SP
SC
 .
a) Tìm giao tuyến của mặt phẳng   MNP với mặt phẳng   ABCD .
b) Tìm giao điểm Q của SD với mặt phẳng   MNP .
c) Tìm thiết diện của mặt phẳng   MNP với chóp.
d) Cho O AC BD   , E MP NQ   . Chứng minh rằng 3 điểm S E O , , thẳng hàng.

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

your answer is -9

step-by-step explanation:

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c