12345 678910 1112131415 Algebra IA – Chapter 2 Problems for Today.

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Presentation transcript:

Algebra IA – Chapter 2 Problems for Today

Solve and check your answer. 2-1: Solve one-step equations in one variable by using addition or subtraction. 1 Check.

Solve and check your answer. 2-2: Solve one-step equations in one variable by using multiplication or division. 2 Check.

Solve and check your answer. 2-3: Solve equations in one variable that contain more than one operation. 3 Check.

Solve. 2-4: Solve equations in one variable that contain variable terms on both sides. 4

The formula for the volume of a rectangular prism with length l, width w, and height h is: Solve the formula for w. 2-5: Solve a formula for a given variable. 5

Solve for s. 2-5: Solve an equation in two or more variables for one of the variables. 6

Find the unit rate. 2-6: Write and use ratios, rates, and unit rates. 7 A computer’s fan rotates 2000 times in 40 seconds. rotations seconds rotations/second

Solve the proportion. 2-6: Write and solve proportions. 8

Find the value of x in the diagram. 2-7: Use proportions to solve problems involving geometric figures. 9

Roger is 5 feet tall and casts a shadow 3.5 feet long. At the same time, the flagpole outside his school casts and shadow 14 feet long. Write and solve a proportion to find the height of the flagpole. 2-7: Use proportions and similar figures to measure objects indirectly. 10 The flagpole is 20 feet tall.

Find the value. Round to the nearest tenth if necessary. 2-8: Solve problems involving percents. 11 Find 75% of 40.

A sales representative earns a 2.5% commission on sales. Find the commission earned when the total sales are $80, : Use common applications of percents. 12 The commission earned on $80,700 is $2,017.50

13 Estimate a 15% tip on a $42.65 restaurant bill. 2-9: Estimate with percents. 10% of $42.65 is $ % is half of $4.265 which is about $ % is 10% + 5% $ $2.13 = $6.40 A 15% tip on $42.65 is about $6.40.

Find the percent change. State whether it is a percent increase or decrease. 2-10: Find percent increase and decrease to 45 The change is an 80% increase. Amount of change Original amount

What is the final price on a $185 leather jacket that is on sale for 40% off? 2-10: Find percent increase and decrease. 15 The final price of the jacket on sale for 40% off is $111.