ANSWER: x > -6
1. subtract 12 from each side
2. divide by -3 which will make the sign flip
5/7 + 5/14 = 1.07142857143
you can round that to 1.1
X^3 + 7*x^2 + -16*x-112
=(x + 4)*(x + 7)*(x - 4)
X = the dividend
x ÷ 7 = 13
x = 13x7
x = 91
Answer:
Step-by-step explanation:
Since the results for the standardized test are normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = test reults
µ = mean score
σ = standard deviation
From the information given,
µ = 1700 points
σ = 75 points
We want to the probability that a student will score more than 1700 points. This is expressed as
P(x > 1700) = 1 - P(x ≤ 1700)
For x = 1700,
z = (1700 - 1700)/75 = 0/75 = 0
Looking at the normal distribution table, the probability corresponding to the z score is 0.5
P(x > 1700) = 1 - 0.5 = 0.5
