Answer:
8
Step-by-step explanation:
check this out!
-5(a+3)=- 55
-5a-15=- 55
-5a= -55+15
-5a= -40
-5a/-5 =-40/-5
a=8
To find the mean of a number sequence, add all the numbers together and divide them by the number of numbers used...
10 + 11 + 10 + 10 + 8 = 49
49 ÷ 5 = 9.8
The mean does not match 10, so make up numbers untill it matches.
10 + 11 + 10 + 10 + 8 + 6 ÷ 6
= 10 !
The anwser would be y = 6
12x² - 11x = 11
Can be rearranged to
12x² - 11x - 11 = 0
Where
a = 12
b = -11
c = -11
To find the discriminant, we do
b² - 4ac
Therefore, the discriminant is 649, which is greater than 0
Therefore the equation has two real irrational solutions.
