Answer:
Step-by-step explanation:
Twice a number is 2n
Sum of 8 and twice a number is
Correct choice is B.
Answer:
Step-by-step explanation:
Combinatorial explanation:
The n balls have to be arranged in n positions and the only distinction is where are the black and where white balls are.
We can choose the position of black balls in 
ways, therefore, white ones are on the remaining positions.
Using binomial we can have explanation written below:
The balls can be arranged in n! possible permutations.
To be precise one particular arrangement includes 
permutations. Since r black balls can be permuted in r! ways and white balls in (n-r)! different orders.
So basically it yields,
permutations.
So the actual amount is,
What does x² look like? <em>goes to +∞ on the left and the right</em>
Well, x⁴ is an even exponent so it is has the same end behavior as x².
Answer: +∞
1.
we distribute then move placeholders to get
2x+4=4x-6+1
9=x
one solution
2. distribute
4x+12=3x+17
x=5
one solution
3. distribute and combine like terms
5x+4=5x-10+7
4=-3
false
no solution
4. distribute
2+10x=10x-5
2=-5
false
no solution
5. distribute
-18+15x=12x-18+3x
x=x
true
infinite solutions
Answer:
-2/3
Step-by-step explanation:
because this is in slope intercept form, m is the slope, so in this case -2/3 is the slope
parallel lines always have the same slope and different y-intercepts
a parallel line could be y=-2/3 +15
