<span>3.4 - 2.8d + 2.8d - 1.3 = </span>3.4 - 1.3 - 2.8d + 2.8d = 3.4 <span>- 1.3 = 2,1
</span>
Answer:
Step-by-step explanation:
Given that the time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes.
P(completing exam before 1 hour)
= P(less than an hour) = P(X<60)
=P(Z<
)
=0.5-0.34=0.16
i.e. 16% of students completed the standardized exam.
Answer:
x= ?
Step-by-step explanation:
1/49=x^2 where x is the side of the square
1/49=(1/7)^2, so the side length of the square is 1/7
Answer: (x-6)/2
Step-by-step explanation:
x=2y+6
x-6=2y
(x-6)/2=y
y=(x-6)/2