Presentation on theme: "Grade Lesson 13 part 2. If you divide each side of an equation by the same nonzero number, the two sides remain equal. If you multiply each side of an."— Presentation transcript:
If you divide each side of an equation by the same nonzero number, the two sides remain equal. If you multiply each side of an equation by the same number, the two sides remain equal. without solving the equation, tell what you know about the value of x in the equation Something like: x is greater than 300.
When you multiply a number by -3, the result is 39. The quotient of a number and 7 is -14. Josh charges $15 to mow an average size lawn in his neighborhood. How many lawns does he need to mow to earn $600? An African elephant can eat 500 pounds of vegetation per day. How many days will a 3000 pound supply last for one elephant? The base B of a triangular prism has an area of 24 square inches. If the volume V of a prism is 216 cubic inches, use the formula V = Bh to find the height of the prism in inches. Luis ran 2.5 times the distance that Mark ran. If Mark ran 3 miles, which equation can be used to find the distance d in miles that Luis ran? A) d = 2.5 + 3 B) d + 2.5 = 3 C) d = 2.5(3) D) 2.5d = 3
Objective: Unit Rates A __________ is a comparison of two numbers by division. Since a ratio can be written as a fraction it can be _____________. A ________ is a ratio that compares two quantities with different types of units. 15 boys to 30 girls 4 candy bars for $2
John paid $40 for 5 pizzas. How much did John pay for each pizza? A _______________ is a rate with a denominator of one. Express the rate as a unit rate. $132 in 3 hours 142 miles on 10 gallons
Express the ratio in simplest form. 6 inches out of 18 feet $35 for 15 dozen cookies
Express the rate as a unit rate. 11,025 tickets for 9 days $2.10 for 6 cans
Which is the better buy? 17 oz box of cereal for $4.89 or 21 oz box of cereal for $5.69