F(x)=x^2
x=-1→f(-1)=(-1)^2→f(-1)=1
g(x)=1/(2x+3)
g(f(-1))=g(1)→x=1→g(1)=1/[2(1)+3]=1/(2+3)→g(f(-1))=1/5
Answer: Option C.) 1/5
Let's use x to represent the number of hours since we don't know that.
750+250x<u><</u><u />2500
Subtract 750 from both sides.
250x<u><</u><u />1750
Divide both sides by 250.
x<u><</u><u />7
The most hours that they can do is 7, or it can be less.
Answer:
Probability of card black 0,5 or 50%
Probability of face card 0,23 or 23 %
Step-by-step explanation:
A normal deck of card has 52 cards, half ( 26) black and half red (26)
Probability of card drawn is black is 0,5 or 50%
The deck has 4 suits and each suit 3 face cards, therefore we find 12 possibles events out of 52
Probability of drawn card is face card 12/52 = 0,23 or 23 %
