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nnchia:
toy guns 4uHi, need help on this question:-
Mrs. Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun cost $10 less than a teddy bear. The total cost of toy guns was $490 more than the total cost of teddy bears.
(a) How much did Mrs. Tan spend on the teddy bears?
(b) How much did on teddy bear cost?
(Answer: (a) - $630, (b) - $18)
I could solve this via algebra but very lengthy so looking for a simpler solution! Thanks!
teddy bears 1u
total cost of teddy bears (1u) = (1750 - 490) / 2 = 630
a) the amount of money that Mrs. Tan spend on the teddy bears is $630
total cost of toy guns (4u) = 630 + 490 = 1120
the cost of toy guns (1u) = 1120 / 4 = 280
Difference between the cost of 1u of teddy bears and toy guns
=630 - 280
=350
Given the difference between the cost of 1 pc of teddy bear and toy gun
=10
No of teddy bears = 350 / 10 = 35
the cost of one teddy bear = 630 / 35 = 18
b) the cost of one teddy bear is $18 -
Thank you so much for your reply!
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Tq jieheng for ur help!
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Hi! I need help in this qn.
In how many years will a sum double itself at 7.5% simple interest?
Tq -
Hi! I need help in this qn.
In how many years will a sum double itself at 7.5% simple interest?
Tq -
Can someone help me to solve this question? TIA
What is the maximum number of cylinders of height 6cm and diameter 4cm be placed into a box measures 21cm by 6cm by 12cm.
:thankyou: -
Herbie:
Amount = Principal + InterestHi! I need help in this qn.
In how many years will a sum double itself at 7.5% simple interest?
Tq
A = P + I
= P + (PRT)/100
= P ( 1 + R%*T)
When a sum double itself , A = 2P
2P = P ( 1 + 7.5%*T)
2 = 1 + 7.5%*T
T = 13 1/3 years = 13 years 4 months -
![](\"http://i43.tinypic.com/2e4vi1v.jpg\")
http://i43.tinypic.com/2e4vi1v.jpg\">
Hi, need help on this question. Thanks! -
nnchia:
Hi, need help on this question. Thanks!
Area Y - Area X = 13.5
(Area Y + Unshaded Area) - (Area X + Unshaded Area) = 13.5
1/2 *7*9 - (Length AB)*9 = 13.5
(Length AB)*9 = 31.5 - 13.5 = 18
Length AB = 18/9 = 2 cm -
Can anyone help me with the following question?
A fruit seller packed some oranges into 22 big carton boxes and 8 small carton boxes. There were 14 more oranges in a big carton box than in a small box. The ratio of number of oranges packed into big carton boxes to the number of oranges packed into small carton boxes was 3 : 1. How many oranges did the fruit seller pack altogether?
:thankyou:
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