Precision and significant digits
What is precision?
A is a level of detail of measurements
What is the radical symbol?
√ ̅
a=2 b=4 c=10
5a+2bc-c
8
Solve
8n-7=2n+5
8n-7=5
Is this ordered pair an answer to this equation
-5x+2y=4
(4,8)
yes
What are significant digits ?
A is one way to resolve the this dilemma
What expression contains a radical symbol?
An radial expression
7a-5b+4
3
Solve
-4(3x-1)=10-4x
- 3/4=x
Write R first four terms de this sequence f(n)+2n(n+1)
4,12,24.40
What is the most precise measurements?
Millimeters or centimeters
What property of exponents would you use for 125 and two thirds
Power of a power property
3a+5b2+2a+4b2
5a+9b2
Solve
a(x+b)=c
solve for x
x=c/a-b
Solve this equation 1/3x -2y+7,(9,-2)
7=7
How many significant digits does 37.85 have?
A common speed at which adults roll bowling bals is 15mil/h 15mi/h is equivalent to now many feet per second?
22 feet per second
Write into an expression the sum of 5& a number times 7
(5+X)7
400-3x+5y=15
see if (8,1) is solution
Not a solution
Set these functions equal to each other
f(x)=2x+4
g(x)2x-8
x+3
A cyclist travels 105 kilometer m 4.2 hours. use dimensional analysis to convert the cyclists speed to miles per minute. Write your answer with the correct number of significant digits. Use 1mi= 1.61 km
A= x miles = 105 km *1mi * 1hr
minutes 4.2hr 1.61km 60min
105mi =0.2588 mi/min
4.2.161
The appropriate number of calories C an animal needs each day is given by c=72n three fourths where m is the animals mass in kilograms. How many calories does an 81 kilograms adult male need each day?
Write into an expression
6 times a number plus 10 over 50
6x+10
50
62-1<-7(y-3)
-2y>y or y<-2
X y (x,y)
-2
0
1
3
5
x y x,y
-2 7 -2,7
0 5 0,5
1 4 1,4
3 2 3,2
5 0 5,0