I'm posting here the Qs i got wrong and am not sure how to answer. Hope you could help me out.
1) Is m + z > 0
a) m-3z > 0
b) 4z - m >0
2) The perimeter of a certain isosceles triangle is 16 + 16 (square root of 2). What is the length of the hypotenuse of the triangle?
3) If the terms of a sequence are t1, t2, t3,..., tn, what is the value of n?
a) The sum of the n terms is 3,124
b) The average (arithmetic mean) of the n terms is 4
4) A certain stock exchange designates each stock with a 1, 2 or 3-letter code, where each letter is selected from the 26 letters of the alphabet. If the letters may be repeated and if the same letters used in a different order constitute a different order, how many different stocks is it possible to uniquely designate with these codes?
5) If ax + b = 0, is x > 0 ?
a) a +b > 0
b) a - b > 0
6) A company has two types of machines, type R and type S. Operating at a constant rate, a machine of type R does a certain job in 36 hours and a machine of type S does the same job in 18 hours. If the company used the same number of each type of machine to the job in 2 hours, how many machines of type R were used?
7) Three grades of milk are 1 percent, 2 percent, and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x+ y + z gallons of a 1.5 percent grade, what is x in terms of y and z?
8) On the number line, the distance between x and y is greater than the distance between x and z. Does z lie between x and y on the number line?
a) xyz < 0
b) xy < 0
9) When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was 1/5 taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?
10) For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b?
a) f(x) = x^2
b) f(x) = x +1
c) f(x) = (square root of x)
d) f(x) = 2/x
e) f(x) = -3x
11) If the speed of x meters per second is equivalent to the speed of y kilometers per hour, what is y in terms of x?
12) Jason's salary and Karen's salary were each p percent greater in 1998 than in 1995. What is the value of p?
a) In 1995, Karen's salary was $2,000 greater than Jason's
b) In 1998, Karen's salary was $2,400 greater than Jason's
13) Each person attending a fund-raising party for a certain club was charged the same admission fee. How many people attended the party?
a) If the admission fee had been $0.75 less and 100 more people had attended, the club would have received the same amount in admission fees.
b) If the admission fee had been $1.50 more and 100 fewer people had attended, the club would have received the same amount in admission fees.
HELP!!!
1) Is m + z > 0
a) m-3z > 0
b) 4z - m >0
2) The perimeter of a certain isosceles triangle is 16 + 16 (square root of 2). What is the length of the hypotenuse of the triangle?
3) If the terms of a sequence are t1, t2, t3,..., tn, what is the value of n?
a) The sum of the n terms is 3,124
b) The average (arithmetic mean) of the n terms is 4
4) A certain stock exchange designates each stock with a 1, 2 or 3-letter code, where each letter is selected from the 26 letters of the alphabet. If the letters may be repeated and if the same letters used in a different order constitute a different order, how many different stocks is it possible to uniquely designate with these codes?
5) If ax + b = 0, is x > 0 ?
a) a +b > 0
b) a - b > 0
6) A company has two types of machines, type R and type S. Operating at a constant rate, a machine of type R does a certain job in 36 hours and a machine of type S does the same job in 18 hours. If the company used the same number of each type of machine to the job in 2 hours, how many machines of type R were used?
7) Three grades of milk are 1 percent, 2 percent, and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x+ y + z gallons of a 1.5 percent grade, what is x in terms of y and z?
8) On the number line, the distance between x and y is greater than the distance between x and z. Does z lie between x and y on the number line?
a) xyz < 0
b) xy < 0
9) When a certain tree was first planted, it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was 1/5 taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?
10) For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b?
a) f(x) = x^2
b) f(x) = x +1
c) f(x) = (square root of x)
d) f(x) = 2/x
e) f(x) = -3x
11) If the speed of x meters per second is equivalent to the speed of y kilometers per hour, what is y in terms of x?
12) Jason's salary and Karen's salary were each p percent greater in 1998 than in 1995. What is the value of p?
a) In 1995, Karen's salary was $2,000 greater than Jason's
b) In 1998, Karen's salary was $2,400 greater than Jason's
13) Each person attending a fund-raising party for a certain club was charged the same admission fee. How many people attended the party?
a) If the admission fee had been $0.75 less and 100 more people had attended, the club would have received the same amount in admission fees.
b) If the admission fee had been $1.50 more and 100 fewer people had attended, the club would have received the same amount in admission fees.
HELP!!!
