Answer:
the first one.simple ezzzz
I hope this helps you
-4y-3x= -11
-2x+4y= -34
-4y-3x-2x+4y= -11-34
-5x= -45
x=9
9-2y=17
y= -4
8 pm to midnight (12 pm) = 4 hrs
so the temp dropped -16.8 in 4 hrs (because the temp started at 0)
-16.8/4 = -4.2....so it dropped 4.2 every hr.
temp at 9 pm (1 hr after 8) would be (0 - 4.2) = -4.2
Answer is A
<B = 90 but <D = 29
Answer:
the n(P) of P = {3, 5, 7, 11, 13, 17, 19} is "128".
Step-by-step explanation:
n(P) is the <u>Cardinality</u> of the set P. Its formula is 2^k.
where k = number of elements in the set.
Hope this helps :)