Answer:
The mean is 80 and the standard deviation is 20. Therefore we have
65 is 0.75 standard deviation below the mean.
Step-by-step explanation:
z = 
Since 85 is 0.25 standard deviations above the mean we have
or 0.25·σ = 85 - μ......1
1.5 = 
or 1.5·σ = μ - 50..............2
From 1 we have σ = 340 - 4·μ substituting into 2 gives
1.5·(340 - 4·μ) = μ - 50 ⇒ 510 - 6·μ = μ - 50
7·μ = 560 or μ = 80
Therefore σ = 340 - 4·μ = 340 - 4·80 = 20
A value, x, 0.75 standard deviation below the mean is given by
0.75 = 
which gives 15 = 80 - x or
x = 65.
Answer:
g(-3) = -30
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
Step-by-step explanation:
<u>Step 1: Define</u>
g(x) = 2x² - 12
g(-3) is x = -3
<u>Step 2: Solve</u>
- Substitute: g(-3) = 2(-3)² - 12
- Evaluate: g(-3) = -2(9) - 12
- Multiply: g(-3) = -18 - 12
- Subtract: g(-3) = -30
How to subtract number with other numbers
C.
You take 53.16 and divide by 8.86. Or you can do is add 8.86 over and over until you get 53.16.
The reason is because it takes 8.86 mins to send a report. 6 times 8.86 equals 53.16
