ALGEBRA I - SECTION 2-5 (Literal Equations and Formulas)

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ALGEBRA I - SECTION 2-5 (Literal Equations and Formulas) @ SECTION 2-5 : LITERAL EQUATIONS and FORMULAS

1) You are ordering pizzas and sandwiches. You have a budget of $80. How many sandwiches can you buy if you buy 4 pizzas? 5 pizzas? $5 each ANSWERS : 8, 6 $10 each LITERAL EQUATION : An equation that involves two or more variables.

Solve each equation for y Solve each equation for y. Then, find the value of y for each value of x. 2) y – 2x = 5; x = 3, -4 ANSWERS : y = 2x + 5; 11, -3 3) 3x – 2y = 10; x = 10, -6 ANSWERS : y = (3/2)x – 5; 10, -14

Solve each equation for x. ANSWER : x = (a – b)/c ANSWER : x = (4c – 4b)/3

FORMULA : An equation that states a relationship among quantities. See page 110 of your textbook. 6) What is the length of a rectangle with area 98 square feet and base 14 feet? ANSWER : 7 feet

Kyle’s yard is shaped like 7) Ellie walks 3 miles per hour (mph) and covers 12 miles. How many hours did she walk? ANSWER : 4 hours Kyle’s yard is shaped like a triangle whose “height” is 800 feet and whose area is 100,000 square feet. How long is the base of Kyle’s yard in feet? ANSWER : 250 feet