2-1 Notes for Algebra 1 Writing Equations

Example 1 pg. 75 Translate sentences into equations. 1.) A number b divided by three is six less than c. 2.) Fifteen more than z times 6 is 11 less than y times 2.

Example 1 pg. 75 Translate sentences into equations. 1.) A number b divided by three is six less than c. 𝑏 3 =𝑐−6 2.) Fifteen more than z times 6 is 11 less than y times 2. 15+6𝑧=2𝑦−11

Example 2 pg. 76 Use the four-step Problem-solving plan. JELLY BEANS A jelly bean manufacturer produces 1,250,000 jelly beans per hour. How many hours does it take to produced 10,000,000 jelly beans?

Example 2 pg. 76 Use the four-step Problem-solving plan. JELLY BEANS A jelly bean manufacturer produces 1,250,000 jelly beans per hour. How many hours does it take to produced 10,000,000 jelly beans? 8 hours

Formula A rule for the relationship between certain quantities.

Example 3 pg. 76 Write a formula GEOMETRY Translate the sentence into a formula. The perimeter of a square equals four times the length of a side.

Example 3 pg. 76 Write a formula GEOMETRY Translate the sentence into a formula. The perimeter of a square equals four times the length of a side. 𝑃=4𝑠

Example 4 pg. 77 Translate Equations into Sentences 1.) 12−2𝑥=−5 2.) 𝑎 2 +3𝑏= 𝑐 6

Example 4 pg. 77 Translate Equations into Sentences 1.) 12−2𝑥=−5 Twelve minus two times x equals negative five. 2.) 𝑎 2 +3𝑏= 𝑐 6 a squared plus three times b equals c divided by 6.

Example 5 pg. 77 Write a Problem Write a problem based on the given information. f = cost of fries f + 1.50 = cost of burger 4(f + 1.50) – f = 8.25

Example 5 pg. 77 Write a Problem Write a problem based on the given information. f = cost of fries f + 1.50 = cost of burger 4(f + 1.50) – f = 8.25 The cost of a burger is $1.50 more than the cost of fries. Four times the cost of a burger minus the cost of fries equals $8.25. How much do fries cost?

2-1 pg. 78 21-39o, 40-45, 51-60(x3)