Answer:
11. 10x^2 - 13x - 3
12. 5x^2 + 18x + 5
Step-by-step explanation:
11. Product means multiplication, so you can multiply (5x + 1) and (2x - 3).
- Using the FOIL (First+Outer+Inner+Last)
So: 
12. 
(So, you distribute the 2 to x^2 + 5x + 30, then combine like terms).
Hopefully, this helped you. Good luck & have a good day!
A=1/3h(b1-b2). So h=3/(b1-b2)
Step-by-step explanation:
13+65..........
13(1+5)
Answer:
Option B is right
Step-by-step explanation:
(One tailed test at 5% significance level)
n =16 and x bar =1.97
s =0.1
Std error of mean = 
Mean diff = 
t statistic =Mean diff/se =-1.2
df =16-1=15
p value =0.124375
(B) do not reject the null because the test statistic (-1.2) is > the critical value (-1.7531).
1/2 because 25 ÷ 25 = 1 and 50 ÷ 25 = 2
