16. Approximate 2 as 1.414. Find approximate values for:
a) 200
b) 20000 17. Approximate 32 as 1.260 and 34 as 1.587. Find approximate values for:
a) 32000
b) 34000000
Find the number of psychology and history textbooks sold, given that the total sold was 290 and the number of psychology textbooks was 42 more than the number of history textbooks.
Let x be the number of history textbooks sold. Then the number of psychology textbooks sold is x+42.
The total number of textbooks sold is x+(x+42)=290.
Solve for x to find the number of textbooks of each type sold.
Marcos' cell phone balance B=25−0.1n where n is minutes talked. a) Initial balance: $25. b) Minutes until balance is 0: 250 minutes. c) Slope: −0.1 minutes/$
Solve for complex numbers and rational exponents without a calculator. Find the values of the variables a, b, c, d, and f that satisfy the given equations. 1. x2=16 solutions: {4,−4} 2. a. 34⋅32=3a, b. 5354=5b, c. 4c=1, d. 26⋅d6=146, e. 6f=61
Redefine homework problems for better discoverability: 1. If y varies directly with x, and y doubles, then x \_\_\_\_\_\_\_\_. 2. Determine if the given table represents direct, indirect, or neither variation. 3. If s varies inversely with t and s=12 when t=8, find the function rule and s when t=3. 4. Find the vertex of f(x)=∣x−3∣+2. 5. Describe the translation from f(x)=∣x∣ to f(x)=∣x−3∣+2. 6. Plot at least 3 points and graph f(x)=∣x−3∣+2.
Denise has 4 more pens than 2 times the number of pens in a box. Write an expression for the number of pens Denise has, where p is the number of pens in a box.