stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
SAT Math percentages and statistics questions Flashcards | StudBud
Explore
/
SAT Math percentages and statistics questions
see picture
if 27x=9y-1 , then
SAT Math percentages and statistics questions
25 terms
·
StudBud Administration
·
5 plays
A #satmath practice on percentages and statistics
Flashcards
25 cards
F
Practice quiz
P
Host live
L
Questions
25
Answers
1
if 27
x
=9
y-1
, then
y=3/2x+1
y=1/2x+2/3
y=3/2x+2
y=3/2x+1/2
2
see picture
D
A
B
C
3
which of the following is equal to (x+i)
2
-(x-i)
2
?
-2
4xi
-2+4xi
0
4
which equation could be used to calculate x?
17=(446+x)/(26+x)
17=(119+6x)/x
17=(119+x)/x
17=(446+16x)/(26+x)
5
if 10
k
=64 then 10
k/2 +1
?
42
80
18
81
6
If (c-3d)/4=d/2, what is the ratio of c to d?
5:1
3:2
3:4
4:3
7
see picture
-x/y
y
x
1/y
8
which expression represents 72 kilometers per hour expressed as meters per hour?
7.2 X 102
7.2 X 10-2
7.2 X 10-3
7.2 X 104
9
g(x)=a√a(1-x), if g(-8)=375, what is the value of a?
625
125
75
25
10
y=k(x-1)(x+9), if k>0 what is the minum value of y expressed interms of k?
-73k
-16k
-7k
-25k
11
Price of a stock falls 25%. what % of the new price must the stock rise to reach orginal value?
33.3%
30%
25%
40%
12
if each players salary is increased by 10%, which of the following is not increased by 10%?
all increase by 10%
mode
mean
median
13
the average of a,b,c,d,e is 28. if the average of a,c,e is 24, what is average of b and d?
33
34
32
31
14
if the solutions of 2x
2
-8x-5=0 are p and q, p>q, what is the value of p-q?
11/2
2√13
√26
7/2
15
John's weight dropped from 168 to 147 pounds. by what % did John's weight drop?
12.5%
25%
14.3%
21%
16
If the result of increasing
a
by 300% of
a
is
b
, then
a
is what percent of
b
?
33.3%
25%
40%
20%
17
if x=2i, y=-4, z=3i, and i=√-1 , then √(x
3
yz) =
4i√6
24i
-24
-4√6
18
On a map, 3/8 of an inch = 120 miles. how many miles does 7/4 inches represent?
480
560
300
360
19
an additional player with a contract for 7.5 million, by what amount, does the mean increase?
300,000
197,500
it cannot be determined
256,250
20
y=2x
2
-12x+11, what is the distance between the vertex of the parabola and the point (3,1) ?
12
10
1
8
21
2 boys paint a fence in 5hrs. How many hours will it take 3 boys to paint the same fence?
14/3
3
10/3
3/2
22
s and t are integers, 8<t<40, and s/t=4/7, how many possibel values are there for t?
four
three
five
two
23
which expression is equivalent to (9x
2
y
6
)
-1/2
3xy3
xy3/3
3/xy3
1/(3xy2)
24
if 4 pens cost $1.96, what is the greatest number of pens purchased for $7.68?
12
15
14
16
25
which of the following is equal to (13+7i)(4-9i)?
-12
115-89i
52-126i
116
