Answer:
57.78
Step-by-step explanation:
90 -(40%*90)
= 90 -36
=54
Tax =7% *54=3.78
Final cost= 54 +3.78 = 57.78
#7:
It means to solve for y.
#8:
We can write:
l = w + 2
Because it says the length is 2 more than the width.
We are given:
p = probability = 0.12<span>
n = total students = 39 </span>
x = left handers = 5<span>
u = mean = p* n = 4.68
σ = standard dev = √ ( n*p*(1-p)) = √ ( 39 * 0.12 * 0.88 ) =
2.03</span>
Calculating for the z score:
z = (x – u) / σ<span>
z = (5 – 4.68) / 2.03</span>
<span>z
= 0.1576 = 0.16
</span>
Using the standard tables for z, the p value is:
p value = 0.5636 = 56.36%
Hence there is a 56.36% chance.
<span> </span>
Answer:
x = 3 twice
Step-by-step explanation:
x^2 = 6x - 9
Rewrite by subtracting 6x from both sides and add 9 to both sides.
x² - 6x + 9 = 0
Factorise by finding factor of +9 that add up to -6
These factors are -3 and -3 that is
-3 -3 = -6 and -3×-3 = 9
Rewrite equation
x² - 3x - 3x + 9 = 0
x ( x-3) -3(x -3) = 0
Therefore
(x -3)(x-3) = 0
x - 3 = 0 or x - 3 = 0
x = 3 or x = 3
x = 3 twice
I hope this was helpful, please rate as brainliest
