By Barbara Jund
ISBN-10: 1576854868
ISBN-13: 9781576854860
Read Online or Download Algebra success in 20 minutes a day PDF
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Additional info for Algebra success in 20 minutes a day
Example text
When you substitute the information you know into a formula, you can use that to find the information you don’t know. For example, if you travel 55 mph for 3 hours, how far would you travel? Substitute what you know into the equation. Then solve the equation for the variable you don’t know. Substitute what you know into the formula. Multiply 55 times 3. You would travel 165 miles. D = rt D = 55 · 3 D = 165 What if you wanted to know how long it would take to travel 300 miles if you were traveling at a speed of 60 mph?
Simplify both sides of the equation. 80 x = $40 2 21. Jack earns ᎏ3ᎏ as much as Jill. His yearly income is $38,000. How much does Jill earn? 1 22. You can save ᎏ5ᎏ the cost of a new washing machine by paying cash. The sale price of the washing machine 1 you plan to buy is $400. What is the regular price of the washing machine? ) 23. You have an exercise regimen that includes doing sit-ups. You are currently doing 5 more than twice the number of sit-ups that you did when you started your exercise program.
5 – 3 · 22 13. (9 – 5) – (6 + 1) 4. 3 · 10 – 18 ÷ 2 14. 4(2 –5) + 8 5. 17 – 3 · 4 ÷ 2 15. 15 ÷ 3 · 23 6. 17 – 4 ÷ 2 · 4 16. 4 + 2(–6) + 15 7. 12 + 32 – 11 17. 3 – –4 · –5 8. 2 + 5(6 ÷ 3) + 4 18. 5 – 3(4)2 9. 45 ÷ 5 – 6 19. 2 + 12 ÷ 6 – 3 · 2 10. 14 ÷ (3 + 2 · 2) 20. 3(2) ÷ 2(3) – 5 Working with Multiple Grouping Symbols What would you do if you had grouping symbols inside grouping symbols? To simplify the expression, 2{4 + 3[10 – 4(2)] + 1}, start from the inside and work to the outside. Your first step is to multiply 4(2).
Algebra success in 20 minutes a day by Barbara Jund
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