Answer:
0.8041
Step-by-step explanation:
We know that
μ=72 and σ=5
and P(65<X<78)
We can determine the Z value as (X-μ)/σ
P( 65<X<78 )=P( 65-72< X-μ<78-72)
To fine the Z values:
From the standard normal tables:
to find P ( Z<-1.4)
From the standard normal tables:
Therefore
Answer:
x = 5
Step-by-step explanation:
A + b = 35
b = 6a
a + 6a = 35
7a = 35
a = 5
b = 30
She scored 30 points in the second game
Answer:
x = -2
Step-by-step explanation:
2x + 4 = 0
2x = -4
2x/2 = -4/2
x = -2
Answer:
A
Step-by-step explanation:
note that (f - g)(x) = f(x) - g(x)
f(x) - g(x)
= 3x - 2 - (2x + 1) ← distribute by - 1
= 3x - 2 - 2x - 1 ← collect like terms
= x - 3 → A
