3. A certain sum of money at simple interest amounts to $560 in 3 years and to $600 in 5 years. Find the principal and the rate of interest. [Ans. $ 500; 4%]

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true