# math NEED HELP!

How did the temperature change if it increased by 25 % and then decreased by 40% ?

1. 👍 0
2. 👎 0
3. 👁 275
1. I changed percentages to decimals.

1.25 -.40 = ?

1.00 - ? = ??

1. 👍 0
2. 👎 1
2. Let x be the starting temperature.
y=1.25x
z=y-.4y=1.25x-.4(1.25x)=.75x

So the final temperature is 75% of the original temperature.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Mathematics

You decide you will buy a stock only if it shows an overall increase over the next 30 days. The first 10 days, it has an average daily increase of 0.30. The next 10 days it has an average daily decrease of 0.45. The last 10 days,

2. ### Chemistry

Sort each of the following events based on whether the solubility of the indicated gas will increase, decrease, or stay the same. Each phrase specifies the gas involved and the change in its environment. 1. The temperature is

3. ### Chemistry

Consider this system at equilibrium. A(aq) B(aq) Delta H = +750 kJ/mol .. What can be said about Q and K immediately after an increase in temperature? a] Q > K because Q increased.. b] Q>K because K decreased.. c] Q

4. ### physics

1. The volume of a gas is 10.0 liters and its pressure is 1.5 atm. If the pressure is decreased to 0.75 atm, what is its new volume? 2. The pressure of a gas is 100.0 kPa and its volume is 500.0 ml. If the volume increases to

1. ### Physics

If you fasten lumps of clay on the prongs of a tuning fork, does this change the amount of moving mass? Does it change the stiffness of the pongs? Explain then whether the fork's natural frequency of oscillation is increased or

2. ### Social Studies

Which was the major result of the Homestead Act of 1862? A)increased public awareness of the need for conservation of natural resources B)increased development of Western Lands C)decreased conflicts between Native Americans and

3. ### Math

At 6:00 A.M. the temperature was 33°F. By noon the temperature had increased by 10°F and by 3:00 P.M. it had increased another 12°F. If at 10:00 P.M. the temperature had decreased by 15°F, how much does the temperature need to

4. ### us history

Which of these was a consequence of a growing textile industry in the United States? Decreased need for unskilled workers Decreased number of inventions Increased cost and reduced efficiency Increased demand for slave labor is it

1. ### Chemistry

A canister holds a gas at 16.3 psi when the temperature is 15˚C. To what will the pressure change when the temperature is increased to 20˚C? *

2. ### math

By what percent will a fraction change if its numerator is increased by 60% and its denominator is decreased by 20%?

3. ### social studies

How did an agricultural surplus relate to expanded trade during the High Middle Ages? A. Trade increased because surplus crops could be traded. B. Trade decreased because surplus crops were needed to feed local populations. C.

4. ### Science

Which factor should be included in a model of energy flow into the atmosphere? variations in local temperatures places experiencing drought concentrations of greenhouse gases number of flood days per year How does climate change