You are saving money to buy an electric guitar. you deposit $1000 in an account that earns interest compounded annually. the expression 1000(1+r)^2 represents the balance after 2 years where r is the annual interest rate in decimal form. write a polynomial in standard form. the interest rate is 3%. what is the balance of your account after 2 years. the guitar costs $1100. do you have enough money in your account after 3 years?

Let's move like a crab, backwards some.

after 2 years?



after 3 years?



is that enough to pay the $1100?

now, let's write 1000(1+r)² in standard form

1000( 1² + 2r + r²)

1000(1 + 2r + r²)

1000 + 2000r + 1000r²

1000r² + 2000r + 1000   <---- standard form.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle