# Zayn

Newest questions posted by Zayn-
## ALGEBRA

Write the equation of a line that passes through (-4,2) and is perpendicular to 3x+6y=9 -
## Maths

A car depreciates in value by 15% for the first year and for each year later by 12% of its value at the beginning of that year. Calculate the percentage decrease in the value of the car after 3 years. Could someone please confirm the answer to be 38.048 -
## Science

Describe how fans in a sporting stadium would need to move to create a transverse wave and a longitudinal wave -
## Math interest

How long will it take for an investment of $5000 to double if it is invested at 5% p.a. simple interest? Been stuck on this and need help thanks -
## Math

1. Which of the following numbers is a rational? A. 4/5 B. square root of 27 C. 4.02002000200002... **** D. Square root of 31 2. Which type of number is shown below? 0.313311333111... A. repeating decimal B. rational C. irrational **** D. terminating -
## Chemistry

A galvanic cell is composed of these two half-cells, with the standard reduction potentials shown: Cu2+(aq) + 2 e- ---->Cu(s) +0.34volt Cd2+(aq) + 2 e- ---->Cd(s) -0.40volt What is the standard free energy change for the cell reaction of this galvanic -
## Algebra

If a quadratic equation with real coefficients has a discriminant of 225, the what type of roots does it have? -
## Maths Percentage

After spending 30% of his money, John had $140 left. How much did he have at first. Siti and Ali saved $4500. Ali and Jim saved $2950. Siti saved thrice as much as Jim. How much did Ali save? At a concert, there were 15 more children than adults. Each -
## Maths

Machine X can pack 3 crates of bottles and Machine Y can pack 4 crates of bottles within the same time. In half an hour, Machine X packs 24 crates. How many crates can 12 Machine Y s pack in 1 hour? -
## Maths

Su Mei bought 3 apples for $2n. How much did she have to pay for 18 apples? -
## Maths

CORRECTION. The selling price of a pencil box was $4. Chee Keong bought the pencil box and paid $4.28 including GST. What percentage of the selling price was the GST? -
## Maths

Rahyu spent 2h 25 min in a library. She spent 30 min of the time reading newspapers. What percentage of her time in the library was spent reading newspapers? Round off your answer to the nearest whole number. -
## Maths

Mr Srinivasan invests $55 000 in a fixed deposit account. The interest rate is 3.3 % per year. How much money will he have in the account after 1 year? -
## Maths

The selling price of a pencil box was $4. Chee Keong bought the pencil box and paid $4.28 including GST. What percentage of milk was left? -
## Maths

A jug contained 780 ml of mil. Mrs Li poured 221 ml of the milk into a glass and 130 ml into a cup. What percentage of milk was left in the jug? -
## Maths

Evelyn has a ribbon 420 cm long. She uses 216 cm to decorate a present., What percentage of ribbon is left> Express your answer correct to 1 decimal place. -
## Maths

A sum of money is shared between Alice, Gayah and Sita in the ratio 3:2:4. If Gayah receives $4287.50, how much money do Alice and Sita receive altogether? -
## Maths

There were 3 glasses containing the same volume of liquid. Mr Lee poured 210 ml of the liquid from Glass A into Glass C, and 150 ml of the liquid from Glass B into Glass C. In the end, the ratio of the volume of liquid in Glass A to the volume of liquid in -
## Maths

Tina and Gopal had some stickers in the ratio 2:3. Gopal gave half of his stickers away and the ratio became 4:3. If Gopal had given away 21 stickers, how many stickers did each person have at first? -
## Maths

The ratio of the number of coins Azam had to the number of coins Eddie had was 3:7. Eddie gave 42 coins to Azam and they ended up having the same number of coins. How many coins did each person have at first? -
## Maths

The ratio of the amount of money Karen had to the amount of money Peter had was 2:5. Peter received $75 from his mother, the ratio became 4:15. How much money did each person have at first? -
## Maths

Sam used cement and sand to prepare a mixture. The ratio of the number of pails of cement used to the number of pails of sand used was 1:2. Sam then added 8 more pails of cement and the ratio became 5:2. A.) How many pails of cement was used at first? B.) -
## Maths

The ratio of the volume of water in Jug A to the volume of water in Jug B is 2:5. A.) If half of the water in Jug A is poured into Jug B, what is the new ratio of the volumes of water in Jug A to Jug B? B.) If half of the water in Jug B is poured into Jug -
## Trigonometry

A standard doorway measures 6 feet 8 inches by 3 feet. What is the largest dimension that will fit through the doorway without bending? -
## maths, economics, game theory

1. What is a degenerate game? 2. Is the following game degenerate or not, justify. 3. Find all nash equilibria in the game in pure or mixed strategies a b c d T 4,5 1,4 2,0 1,2 B 6,0 0,1 1,3 0,2