1.) The total amount of water used to water a lwen on Monday was 14.8 gallons. When the lawn was watered on Thursday, the total amount of water used increased by 1/4 percent. What was the total number of gallons of water used to water the lawn on THURSDAY?
choices are: A) 14.4
B) 14.55
C) 15.05
D) 15.2
I keep getting 18.5
2) 3xy - 1/5 y
What is the value of the expression when x=2/3 and y=35?
2007-08-18 11:55:08 · 13 answers · asked by Isa 1 in Science & Mathematics ➔ Mathematics
Divide 14.8 by 4
Add the outcome of that to 14.8
As for the second all you need to is plug in the numbers and multiply.
2007-08-18 11:59:48 · answer #1 · answered by Anonymous · 0⤊ 1⤋
On Thu, the amount used
= 14.8 x 100.25/100
= 14.84 gallons
None of the answers are right.
Another way to look at it.
1% increase would be 14.8/100 = 0.148 gallon
1/4% increase = 0.148/4 = 0.0395 ~0.04 gallon
so total use = 14.8 + 0.04 = 14.84 gallons
ALL the answers are wrong!
when x=2/3, y=35,
3xy - 1/5y = 3 (2/3) 35 - 1/5 35
= 70 - 7 = 63
2007-08-18 12:06:15 · answer #2 · answered by vlee1225 6 · 0⤊ 0⤋
1. 14.8 X 1.0025 = 14.837. B or C are the closest answers.
2. 3x = 2 1/5y = 7, so the answer is 2 x 7 = 14. Your probable mistake is that you are thinking that 1/4 percent is the same as 25%.. 1/4% is .0025, not .25
2007-08-18 12:15:05 · answer #3 · answered by Renaissance Man 5 · 0⤊ 0⤋
i dont have a calculator on me so i'll try to explain the way that i think it should go....
1 percent of 14.8 then divide by four?
then add what you get when you divide by four?
im not sure what the answer would be, but i think thats how it would be?
kk, now for number 2:
3xy - 1/5 y
3 2/3 35 - 1/5 35
kk, now im stumped cause i still cant find a calculator! grr!! sorry i cant help you! im only going into eighth grade myself so i dont even think the first one in right. good luck!
with love, lillian jean
2007-08-18 12:07:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1) You are using 125%
Amount used Thursday was 14.8 * 0.25% = 0.37 gallons
It cannot be A or B they are lower.
C is 0.25 gallons more
D is 0.4 gallons more, which is 0.25% of total.
2) 3xy - 1/5y
Substitute:
3(2/3)35 - 1/5(35)
Simplify:
2*35 - 7
70 - 7 = 63
2007-08-18 12:34:24 · answer #5 · answered by Robert S 7 · 0⤊ 0⤋
= 14.8 + 1/4(14.8)
= 14.8 + 3.7
= 18.5
Answer: 18.5 gallons
2) 3xy - 1/5y
= 3(2/3 * 35) - 1/5(35)
= 3(23 1/3) - 7
= 70 - 7
= 63
Answer: 63
2007-08-22 04:20:46 · answer #6 · answered by Jun Agruda 7 · 3⤊ 0⤋
You are reading the question incorrectly. Add 1/4 of a gallon. 14.8+.25 = 15.05
2007-08-18 12:04:44 · answer #7 · answered by Info_Please 4 · 0⤊ 1⤋
Divide 14.8 by 4
Add the outcome of that to 14.8
As for the second all you need to is plug in the numbers and multiply.
2007-08-18 12:18:13 · answer #8 · answered by Anonymous · 0⤊ 1⤋
1% = .01
1/2% = .005
1/4% = .0025
Therefore, 14.8 gallons + 1/4%, or .0025 more = 14.837 gallons.
2007-08-18 12:13:57 · answer #9 · answered by Savo 2 · 0⤊ 0⤋
1/4 %?
2007-08-18 12:03:25 · answer #10 · answered by roguetrader12002 4 · 0⤊ 0⤋