CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies inversely as x. If y=50/3 when x=6, what is y when x=7?
A. 100/7
B. 107/7
C. 25/2
D. 50/3
Correct Answer: A
xy=100; y=100/7=100/7.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies inversely as x. If y=18 when x=5, what is y when x=6?
A. 16
B. 18
C. 15
D. 90/7
Correct Answer: C
xy=90; y=90/6=15.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies inversely as x. If y=20 when x=4, what is y when x=5?
A. 40/3
B. 20
C. 16
D. 17
Correct Answer: C
xy=80; y=80/5=16.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies inversely as x. If y=70/3 when x=3, what is y when x=4?
A. 70/3
B. 35/2
C. 14
D. 37/2
Correct Answer: B
xy=70; y=70/4=35/2.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies inversely as x. If y=30 when x=2, what is y when x=3?
A. 21
B. 15
C. 30
D. 20
Correct Answer: D
xy=60; y=60/3=20.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=77 when x=7, what is y when x=9?
A. 99
B. 88
C. 100
D. 110
Correct Answer: A
k=11; y=11×9=99.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=60 when x=6, what is y when x=8?
A. 70
B. 80
C. 90
D. 81
Correct Answer: B
k=10; y=10×8=80.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=45 when x=5, what is y when x=7?
A. 63
B. 54
C. 64
D. 72
Correct Answer: A
k=9; y=9×7=63.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=32 when x=4, what is y when x=6?
A. 49
B. 40
C. 48
D. 56
Correct Answer: C
k=8; y=8×6=48.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=21 when x=3, what is y when x=5?
A. 42
B. 36
C. 35
D. 28
Correct Answer: C
k=7; y=7×5=35.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=42 when x=7, what is y when x=9?
A. 55
B. 60
C. 54
D. 48
Correct Answer: C
k=6; y=6×9=54.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=30 when x=6, what is y when x=8?
A. 41
B. 40
C. 35
D. 45
Correct Answer: B
k=5; y=5×8=40.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=20 when x=5, what is y when x=7?
A. 32
B. 28
C. 29
D. 24
Correct Answer: B
k=4; y=4×7=28.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=12 when x=4, what is y when x=6?
A. 18
B. 21
C. 15
D. 19
Correct Answer: A
k=3; y=3×6=18.
CSS - PMS - CCE - PCS - Mathematics
Algebra
y varies directly as x. If y=6 when x=3, what is y when x=5?
A. 8
B. 11
C. 12
D. 10
Correct Answer: D
k=2; y=2×5=10.
CSS - PMS - CCE - PCS - Mathematics
Algebra
Find the sum of the first 8 terms of a geometric sequence with first term 2 and common ratio 2.
A. 511
B. 510
C. 512
D. 508
Correct Answer: B
Sₙ=2(2⁸-1)=510.
CSS - PMS - CCE - PCS - Mathematics
Algebra
Find the sum of the first 7 terms of a geometric sequence with first term 1 and common ratio 2.
A. 128
B. 127
C. 126
D. 129
Correct Answer: B
Sₙ=1(2⁷-1)=127.
CSS - PMS - CCE - PCS - Mathematics
Algebra
Find the sum of the first 6 terms of a geometric sequence with first term 4 and common ratio 2.
A. 252
B. 256
C. 254
D. 248
Correct Answer: A
Sₙ=4(2⁶-1)=252.
CSS - PMS - CCE - PCS - Mathematics
Algebra
Find the sum of the first 5 terms of a geometric sequence with first term 3 and common ratio 2.
A. 90
B. 96
C. 93
D. 95
Correct Answer: C
Sₙ=3(2⁵-1)=93.
CSS - PMS - CCE - PCS - Mathematics
Algebra
Find the sum of the first 4 terms of a geometric sequence with first term 2 and common ratio 2.
A. 32
B. 28
C. 31
D. 30
Correct Answer: D
Sₙ=2(2⁴-1)=30.