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문제 17
The formula C=5/9(F-32) expresses the relationship between Fahrenheit temperature, F, and Celsius temperature, C. In Exercises 17–18, use the formula to convert the given Fahrenheit temperature to its equivalent temperature on the Celsius scale. 50 °F
문제 19
A football was kicked vertically upward from a height of 4 feet with an initial speed of 60 feet per second. The formula h=4+60t-16t2 describes the ball's height above the ground, h, in feet, t seconds after it was kicked. Use this formula to solve Exercises 19–20. What was the ball's height 2 seconds after it was kicked?
문제 21
Find the intersection of the sets. {1,2,3,4}∩{2,4,5}
문제 23
Find the intersection of the sets. {s,e,t}∩{t,e,s}
문제 27
Find the intersection of the sets. {a,b,c,d}∩∅
문제 34
Find the union of the sets. {e,m,p,t,y} ∪ ∅
문제 35
List all numbers from the given set that are a. natural numbers, b. whole numbers, c. integers, d. rational numbers, e. irrational numbers, f. real numbers. {-9, -4/5, 0, 0.25, √3, 9.2, √100}
문제 37
List all numbers from the given set that are a. natural numbers, b. whole numbers, c. integers, d. rational numbers, e. irrational numbers, f. real numbers. {-11, -5/6, 0, 0.75, √5, π, √64}
문제 43
Determine whether each statement is true or false. -13 ≤ -2
문제 47
Determine whether each statement is true or false. -π ≥ - π
문제 49
Determine whether each statement in is true or false. 0 ≥ -6
문제 51
Rewrite each expression without absolute value bars. |300|
문제 53
Rewrite each expression without absolute value bars. |12 - π|
문제 54
Rewrite each expression without absolute value bars. |7 - π|
문제 57
Rewrite each expression without absolute value bars. -3/|-3|
문제 59
Rewrite each expression without absolute value bars. ||-3|-|-7||
문제 61
Evaluate each algebraic expression for x = 2 and y= -5. |x+y|
문제 63
Evaluate each algebraic expression for x = 2 and y = -5. |x|+|y|
문제 67
Express the distance between the given numbers using absolute value. Then find the distance by evaluating the absolute value expression. 2 and 17
문제 69
Express the distance between the given numbers using absolute value. Then find the distance by evaluating the absolute value expression. −2 and 5
문제 70
Write each number in decimal notation without the use of exponents.
문제 72
Express the distance between the given numbers using absolute value. Then find the distance by evaluating the absolute value expression. -26 and -3
문제 74
Write each number in decimal notation without the use of exponents.
문제 75
State the name of the property illustrated. 6+(−4)=(−4)+6
문제 77
State the name of the property illustrated. 6+(2+7)=(6+2)+7
문제 80
State the name of the property illustrated. 7⋅(11⋅8)=(11⋅8)⋅7
문제 83
State the name of the property illustrated. 1/(x+3) (x+3)=1, x≠−3
문제 104
In Exercises 103–110, insert either <, >, or = in the shaded area to make a true statement. |−20| □ |−50|
문제 107
Insert either <, >, or = in the shaded area to make a true statement.