d. Negative 10. The sum of two negative numbers is always bo 20.solve: 12-61 - - 3421 b.1 c. Positive d. 2 c. O 21. loborraine was situated 800 feet bolow sea level. If it ascenda 250 feet , what is its new position? c. 550 f below sea level d. 550 f above sea level a. 1060 f below sea level b. 1050 ft above sea level 22. What is the sum of and ? b. - 23. What is the difference of and b. a c. d. -7 . d. 24. 3/8 +2/6 a. 1/24 b. 5/ 14 c. 17/ 24 d. 5/48 25. Find the sum: (1/4-1/3) + (1/2-1/5). a. 1/60 b. 23 / 60 c. 13/60 d. 60 / 23 26. Which of the following rational number is the 19? a. 5 b. 6 c. 7 d. 8 27. If the 165 lies between 8 and 9, where is the 189 lies between? a. 8 and 9 b. 9 and 10 c. 10 and 9 d. 9 and 8 . 28. Which of the following number is a perfect square? a. 121 b. 91 c. 101 d. 85 29. Which of the following pair of integers where the V20 lies between? a. 1 and 2 b. 2 and 3 c. 3 and 4 d. 4 and 5 30. Which of the following radical expression is rational? b. 158 d. 175 31. A number that can be expressed as a quotient of two integers a&. a. Integers b. rational c. radicals d. whole number the following is the same as 497 c. /64 a. 142
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19.) D. Negative
20.) D. 2
21.) B. 1050 ft above sea level
22.) C. 7/9
23.) C. 1/6
24.) C. 17/24
25.) C. 13/60
26.) C. 7
27.) B. 9 and 10
28.) A. 121
29.) D. 4 and 5
30.) C. √64
31.) B. rational
19.) because (-1) + (-1) = (-2) and its still negative
20.) solution
(2-5) + 3 + 2) subtract 2 - 5 = (-3)
(-3) + 3 + 2) add (-3) + 3 = 0 because 3 is positive
(0 + 2) = 2
21.) 800 + 250 = 1050 and its addition so 1050 ft "above" sea level
22.) sum means add
because the denominator is same or like or similar so you can't add the denominator (below the fraction)
23.) difference means subtract
look at the denominator its same so you can't subtract the denominator
24.) 3/8 + 2/6
look at the denominator, its not same or unlike or dissimilar, so i made a butterfly method (fraction 1 numerator place: numerator 1 and denominator 2, fraction 2 numerator space: denominator 1 and numerator 2, fraction 1 and 2 denominator space: denominator 1 and denominator 2)
25.) (Solution at the pic)
26.) Because 7x7=49 and 49 is the perfect square
27.) √89 lies between 9 and 10 Because
9x9=81 < 89 < 10x10=100
81 < 89 < 100
9 < 89 < 10
28.) 11x11=121 and its rational or perfect square
29.) 20 lies between 4 and 5 because
4x4=16 < 20 < 5x5=25
16 < 20 < 25
4 < 20 < 5
30.) because 8x8=64 √64=8
31.) rational number, in arithmetic, a number that can be represented as the quotient p/q of two integers such that q ≠ 0. In addition to all the fractions, the set of rational numbers includes all the integers, each of which can be written as a quotient with the integer as the numerator and 1 as the denominator. In decimal form, rational numbers are either terminating or repeating decimals. For example, 1/7 = 0.142857, where the bar over 142857 indicates a pattern that repeats forever.
hope it helps