Tammy buys 3 lemons for $.87. She sells them 2 for $.78. How many lemons must she sell to make a profit of $1.20? Type just the number answer with no label

12 lemons

Step-by-step explanation:

In this question, we are asked to find the number of lemons to be sold at a particular price to make a particular profit.

Let’s have our cost price per lemon. 3 is bought for 87 cents, that means on the average one is bought at 87/3 = 29 cents

Selling price is 2 per 0.78 , this means one is sold at 78/2 = 39 cents

Now, we need to know the number of lemons to be sold to make a profit of 120 cents.

Let the amount of lemon be x

Mathematically;

39(x) - 29(x) = 120

10x = 120

x = 120/10

x = 12

"it's not the heat, it's the humidity".   that's a partly valid phrase you may have heard in the summer, but it's actually both.   the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.   this has important considerations for the human body's comfort.   when the body gets too hot, it begins to perspire or sweat to cool itself off.   if the perspiration is not able to evaporate, the body cannot regulate its temperature.   evaporation is a cooling process.   when perspiration is evaporated off the body, it effectively reduces the body's temperature.   when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.   in other words, the human body feels warmer in humid conditions.   the opposite is true when the relative humidity decreases because the rate of perspiration increases.   the body actually feels cooler in arid conditions.   there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation: