Answer:
x= 3 and x= -3
Step-by-step explanation:
x^2 -9 = 0
Factor x^2-9
(x+3)(x-3)
If x+3=0, then x= -3
If x-3=0, then x= 3
Answer:
294.1 pounds
Step-by-step explanation:
Step 1
We find the z score for 90th percentile
= 1.282
Step 2
We solve using z score formula
z = (x-μ)/σ, where
x is the raw score ??
μ is the population mean = 230 pounds
σ is the population standard deviation= 50 pounds
1.282 = x - 230/50
Cross Multiply
1.282 × 50 = x - 230
64.1 = x - 230
x = 230 + 64.1
x = 294.1 pounds
The birth weight of elephants at the 90th percentile is 294.1 pounds.
Answer:
First one : 3
Step-by-step explanation:
First one : Makes more sense for number 3. We do not know how much money she has now because we do not know the number of tickets.
Second one : I really do not know
Third one : 1
Answer:
A 3.24 milligrams
Step-by-step explanation:
4 milligrams of copper - 0.76 milligrams of lead = 3.24 milligrams.
brainliest please. . . .
