ACCURACY
The true value Mr smith's blood pressure is 120/80 , the machine reads 170/96
- is not accurate
1m=----- cm
100
( x + 5 )(x + 4)
x2 + 9x + 20
sam saved up $375 then bought a sweater for d dollars.
write as a expression
375 - d
solve for V
C=xv + x
( C-x)/x= V
you measure a string three times and get 7.5cm , 7.4cm and 7.5cm . the string is known to be 5cm .
not accurate
1 km = ------ m
1000
( 4x + 3)(x+ 2)
4x2+ 11x+6
sandy mom gave her d dollars for her allowance one week. she also earned $ 20.00 for his newspaper route that week.
write as an expression
20.00 + d
Solve for m
E = mc2
m = E/c2
how close a measurement is to the true value is called
Accuracy
71 km = ------ m
71,000
(x-1)(x-8)
x2-9x+8
k friends evenly divided up a 12 slice pizza. One of the friends, Harris, ate 1 fewer slice than he was given. How many slices of pizza did Harris eat?
Write as an expression.
12/k-1
Solve for b
y = mx + b
y-mx+b
a measurement taken three times has the following readings 78.1 , 43.9, and 2 . accepted value is 68.1
not accurate
13 km 20 m = ----- m
13,020
multiply
x2(2x+3)
2x3+3x2
A pizza delivery driver earns $12 an hour and works h hours per day. He also spends $ 12 a day on gas. How much money will the driver earn in one day.
Write as an expression.
12h-12
6=-2x
solve for x
x=-3
you get on the scale at the doctors office and it tells you , your weight is 75kg , yesterday at home your scale said 74.5 kg .
is accurate
7 decimeters equals how many millimeters
700
2x(-2x-3)
-4x2-6x
25 less than a number (n)
Write as an expression.
n-25
x/5=3
solve for x
x=15