a.
<K = <M = 50 ...Opposite angels are congruent
<K + <L = 180...Consecutive angles are supplementary
50 + <L = 180 so <L = 180 - 50 = 130
<L = <N = 130...Opposite angels are congruent
50 + <N = 180 so <N = 180 - 50 = 130
b.
MN = LK = 7...Opposite sides are congruent
KN = LM = 10...Opposite sides are congruent
This involves quite a lot of arithmetic to do manually.
The first thing you do is to make the first number in row 2 = to 0.
This is done by R2 = -3/2 R1 + R2
so the matrix becomes
( 2 1 1) ( -3 )
( 0 -13/2 3/2) (1/2 )
(5 -1 2) (-2)
Next step is to make the 5 in row 5 = 0
then the -1 must become zero
You aim for the form
( 1 0 0) (x)
(0 1 0) (y)
(0 0 1) ( z)
x , y and z will be the required solutions.
Answer is 53911
Step-by-step explanation:
Just multiply to get the answer
Answer:
18
Step-by-step explanation:
4 miles in 20 mins = 1/5 mile in 1 min
1 1/2 hours = 90 mins
1/5*90=18
9(7k-4)-2(7k-12) so first separate these two parts of it ok. 9(7k-4) the - and 2(7k-12) so first let’s do 9(7k-4) multiply 9*7 to get 63k and 9*4 to get 36. So now u have 63k-36. Let’s do the 9(7k-12) now. Same thing. 2^7=14 then 2*12 = 24 which leaves u at 108. So now if u put i together it’s (63k-36)-(14k-24) soooo 63k-14k= 49k and 36-24 = 12 so ur answer is 49k-12 !!! Hope that helps man