If y varies directly as x and y = 40 when x = 8, find y when x = 10.
A 48
B 50
C 70
D 80
What is the final price of a $50 shirt that is on sale for 20% off?
A $40
B $35
C $48
D $26
Find 85% of 400.
A 340
B 380
C 34
D 38
A flag pole that is 15 feet tall casts a shadow 5 feet long. A nearby building casts a shadow that is 40 feet long. How tall is the building?
A 100 feet
B 86 feet
C 70 feet
D 120 feet
2006-12-22 06:18:58 · 9 answers · asked by monkey 2 in Science & Mathematics ➔ Mathematics
1. (B )
y=kx
k=y/x=40/8=5
Y=(5)(10)=50
2. (A)
Cost=% (price)/100=
(100-20) (50)/100=.8(50)= 40
3. (A)
.85(400)=340
4. (D) since the angle of the Sun is the same for the poll as it is for the building then
15/5=x/40
x=40(15/5)=120
2006-12-22 06:23:29 · answer #1 · answered by Edward 7 · 3⤊ 0⤋
1. 40/8 = 5; 5*10 = 50 therefore B
2. 50*.2 = 10; 50 - 10 = $40 therefore A
3. 400*.85 = 340 therefore A
4. The right trangles must be proportional. 15/5 = 3; x/40=3 therefore x = 120 D.
2006-12-22 06:27:12 · answer #2 · answered by Tim L 2 · 3⤊ 0⤋
1)k=y/x
k=40/8=5
k=x*y=10*5=50
The answer is B.
2)1-.20=.80
50*.80=$40
The answer is A.
3)85/100=.85
400*.85=340
The answer is A.
4)x=the height of the building:
15/5=x/40
5x=(15*40)
5x=600
x=120
The answer is D.
2006-12-23 04:18:13 · answer #3 · answered by Anonymous · 2⤊ 0⤋
the 2nd one would be 40 bucks
2006-12-22 06:23:06 · answer #4 · answered by chanti 3 · 2⤊ 0⤋
Are you serious ??? I think even my cat could give the answers, if she wasn't busy sleeping !
So if you really want to know, it's B-A-A-D. And if you want to know why, just call me and ask for the cat.
2006-12-22 08:23:51 · answer #5 · answered by Anonymous · 3⤊ 0⤋
B A A D
2006-12-25 16:44:21 · answer #6 · answered by _anonymous_ 4 · 0⤊ 0⤋
1)B
2)A
3) I DONO
2006-12-22 06:42:04 · answer #7 · answered by Anonymous · 3⤊ 0⤋
A, B, C, D
2006-12-22 06:22:00 · answer #8 · answered by <>< 2 · 0⤊ 0⤋
B
A
A
D
2006-12-22 06:22:54 · answer #9 · answered by Christine 4 · 3⤊ 0⤋