Annie needs the signatures of 5% of the 412 seniors; this is

,

which means she needs the signatures of at least 21 seniors. She has 22.

She needs the signatures of 5% of the 436 juniors; this is

,

which means she needs the signatures of at least 22 juniors. She has 23.

She needs the signatures of 5% of the 536 sophomores; this is

.

which means she needs the signatures of at least 27 sophomores. She has 26.

She has enough signatures from seniors and juniors, but not sophomores.

At the very least, Rhonda won 60% of the votes cast, so the total number of votes won by her opponents can be at most 40% of the votes cast. Suppose this is the case. If we let be the number of votes Rhonda won, then we can set up the ratio

At minimum, Rhonda won 324 votes.

Carla and Lisa won the highest and second-highest number of votes, respectively, so Hy must  have won fewer votes than Lisa. He won at most 65 votes. This would have been

The closest answer is 25%.

15 % of the 341 members of the senior class is

.

Since Clinton has 52, he has enough signatures.

This is a simple problem, so long as you don't forget that Bill and Ted have different amounts of money, so you can't simply average 15% and 25% to get 20%.

Calculate how much each donates:

4000(.15)= 600

8000(.25)= 2000

Now divide the total donation by their total wealth:

Now multiply this answer by 100, and then round to the nearest tenth to get 21.7%.

To find the percent you must put the part over the whole, 

Whole is represented by the number of seeds planted and the part represents the number of plants in the garden.

Substitute the values into the percent formula

Now multiply by 100 to make it a percent which is .

Translate the sentence into an equation

Isolate  and you get .

Remember that the question is asking for a percentage, so convert  into .

The sum of two negative numbers is always negative, hence, this is the right choice.

As for the other choices:

The product or quotient of two negative numbers is always positive. 

A negative number taken to the power of a positive integer can be either negative or positive depending on whether the exponent is even or odd. , which is positive, and , which is negative.

The difference of negative numbers can be either negative, positive, or zero:

, but 

Because is positive,  must be negative since the product of two negative numbers is positive.

Because  is also positive, must also be negative in order to produce a prositive product.

To check you answer, you can try plugging in any negative number for .

By choosing a random negative number, for example: –4, we can input the number into each choice and see if we come out with another negative number.  When we put –4 in for x, we would have –4 – (–(–4)) or –4 – 4, which is –8.  Plugging in the other options gives a positive answer.  You can try other negative numbers, if needed, to confirm this still works.