Letbe the number of pizzas made and sold. Each pizza will require $2 worth of ingredients, so the ingredients in total will cost. Add this to the cost to rent the equipment and the cost will be.

The pizzas will cost $4.50 each, so the money raised will be.

The profit will be the difference between the revenue and the cost:

The French club wants a profit of at least $500, so we set up and solve the inequality:

At least 300 pizzas must be made and sold.

50磅的咖啡豆总数的数量,one of the equations would be

.

The total price of the Kona beans is the unit price, $24 per pound, multiplied by the quantity,pounds. This isdollars. Similarly, the total price of the Ethiopian delight beans isdollars, and the price of the mixture isdollars. Add the prices of the Kona and Ethiopian Delight beans to get the price of the mixture:

These are the equations of the system.

Since Leslie has twice as many dimes as nickels, the number of nickels she has is half the number of dimes, or half of. This means she hasnickels. Also, since she has four more quarters than dimes, she hasquarters.

She has

in nickels,

in dimes, and

in quarters.

我n total, the number of dollars Leslie has is

Leslie hasdollars.

After John has ate 2 candies out of his total of 48 candies, he has 46 candies left.

25% of 46 is equivalent to:

However, candies are counted in units, which means if John could have only given 11 candies to charity if he said he has given almost 25% away. The trick answer is 34 because 11.5 candies cannot be rounded to 12 candies.

Hence:

Let x be the cost of the phone before applying the 20% discount. After applying the discount, the value will be equal to some amount y before applying tax.

After amount y has been taxed the 8.25%, the new value will be the price of the phone, which is $500. The equation representing this relationship is:

We have a system of equations. Substitute y in terms of x into the 2nd equation. Solving the value of x will give the original value of the phone.

Therefore, the price of the phone is approximately $577.37.

Every word problem has anunknownnumber. In this problem, the unknown number or value is the price of the shirt. The variablewillrepresent the unknown number.

我n this problem,will represent how much Mary spent for the shirt. The problem states that $48 was $14 less than 2 times what she spent on for the shirt. An equation will be written in order to solve this problem.

Then solve for.

The first step is to remove the subtraction of $14 by using the inverse operation, which would be addition. Remember, because it is an equation, whatever operation you choose to perform on one side of the equation must also be done to the other side of the equation. Therefore, you will add $14 to both sides of this equation.

我n order to solve for, you will need to divide both sides by the coefficient, (the number next to the variable), which is 2.

This kind of question is really just a basic rate problem. What it is asking is "How many monthsat ratedoes it take to make鸟屋?”率是t的组合he two men's rates:

Thus, you can set up the equation:

Thus,

To solve this equation, first get everything into the same units. Recall that there areml for every one liter. Thus,liters are equal toml. Now, what you basically have is a rate equation. Recall that the total work is represented as follows:

For your data, the total "work" is theml. Start by calculating the time as a decimal:

This gives you:

However, remember that this is in seconds. You need to convert back to hours. You do this by dividing by, giving you. Rounding up, this gives youhours.

This question could be set up like an equation as follows:

The variableindicates the number of books that would have to be sold. This comes out to:

Now, don't be tricked! You can't sell partial books. Thus, you will need to sellbooks in order to turn a profit. If you only sell, you will not have sold enough to make a profit.

This question is a bit hard. You need to think it out step by step. First, you could write an equation like this:

This represents the idea of trying to calculate when the profit per book will be three dollars. Now, we know that profit is equal to:

Thus, you can rewrite your equation:

Now, the original cost is calculated by multiplyingby. This is the same as. The sales amount is just, whereindicates the total number of books sold. This will also be the total forin your equation. Thus, you can write out the following equation:

Now, just solve for:

However, you will need to sell one more book than. (That would be just a little too insufficient.) Thus, the answer is.