9514 1404 393
Answer:
- n = (s/m) -r
- n = (s -mr)/m
Step-by-step explanation:
1. Undo the operations done to n, in reverse order. Here, n has r added and the sum is multiplied by m. First we divide by m, then we subtract r.
m(n+r) = s . . . given
n +r = s/m . . . divide by m
n = (s/m) -r . . . subtract r
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2. Eliminate the parentheses, then proceed as above. Subtract the added term, then divide by the coefficient of n.
m(n+r) = s
mn +mr = s . . . eliminate parentheses
mn = s -mr . . . subtract the added term
n = (s -mr)/m . . . divide by the coefficient of n
Answer:
ASA
Step-by-step explanation:
∠BAC ≈ ∠CAD
AC = AC
∠BCA ≈ ∠ACD
Answer:
B or D would be the best options for this question
Answer:
Step-by-step explanation:
Let X be the diameter of bolts produced in a machine shop
X is normal with mean = 6.46 mm and std dev = 0.05 mm.
We are to find the two diameters that separate the top 9% and the bottom 9%.
We can use std normal distribution value for this and from Z we can calculate X values
P(Z<z) = 0.09 and P(Z<z1) = 0.91
z=-1.341 and z1 = +1.341
Corresponding X values would be
for bottom 9%
X = 6.46-1.341*0.05 = 6.39295
X = 6.46+1.341*0.05=6.52305
Adding a negative is the same as subtracting a positive,
So,
5 + (-7.5) = 5 - 7.5
which is equal to,
-2.5
You can also graph this on a number line
