-4x^2-5(x+3)+x^2
First, combine like terms.
-4x^2+x^2= -3x^2
-3x^2-5(x+3)
Distribute the 5.
-3x^2-5x-15 <=== the simplified answer
I hope this helps!
~kaikers
These questions should be asked more clearly.
If 3% is the standard deviation of the average then a 1% decrease in score is a z=-1/3, which is small in absolute value, so we can't reject the claim. In this interpretation we'd answer: -0.33, no.
But if we'll assume 3% is the standard deviation of the individual samples, it's a different story. We use percent as our unit. The standard deviation of the average is
.
So we get a z (really a t) here of
That's kinda borderline, a one sided t test with 29 dfs will give about the same probability as the normal distribution for a tail z=1.8, p=.036 aka p=3.6%. Typically we'd choose a 1% or 5% rejection threshold before we started; this one is in between.
Area of a rectangle = base*height
= 8.5*6.3
= 53.55
= 53 11/20 cm^2, thus the answer is D
12, since the amount of blueberry muffins is equal to the total amount of muffins divided by 3. 36 / 3 = 12
Answer:
9π, or 28.26
Step-by-step explanation:
The Arc of the semicircle is the circumference of half a circle.
The radius of the semicircle is 9, and the circumference of a circle is 2πr, so it is 2π9 = 18π. since this is a semicircle, it is half of that, so 9π, or 28.26, since π is 3.14 here