X^2+2x-5x-10
x(x+2)-5(x+2)
(x-5)(x+2)
Answer:
You can start by distributing the 3 to the m+4
(3m + 12)
Now you can add on the -5m and simplify
(3m+12-5m)
-2m+12
Answer:
A
Step-by-step explanation:
treat the problem as an equation and solve for n, it is 4
It sounds like your book is asking "what is the probability that the card is either a black card or a 9"
If so, there are 26 black cards (13 spades and 13 clubs) and four cards that have "9" on them (one in each suit). We have 26+4 = 30 cards that are either one or the other. There is overlap though. Namely the 2 black cards that have "9" on them (we count them twice), so we should subtract to get 30-2 = 28
There are 28 cards that either have a '9' on them, they are black, or both
This is out of 52 cards total
Divide the two values: 28/52 = 14/26 = 7/13 = 0.53846
Answer as a fraction: 7/13
Answer in decimal form: 0.53846
Answer as a percentage: 53.846%
Side note: the decimal form and percentage form are approximate
