Simplify , -4a^2b^2 + 6x^2y^3 - 15a^2b^2 + 3x^2y^2 + ab

ab + 3x²y² + 6x²y³ - 19a²b²

Step-by-step explanation:

All you do is combine like-terms:

-4a²b² - 15a²b² = -19a²b²

-3x²y² + 6x²y² = 3x²y²

Notice that ab and 6x²y³ do not have a like-term to pair up with. Moreover, if you are wondering why 3x²y² is written there instead of a 9x²y², I will show you why:

[-4a²b² + 6x²y³] - [15a²b² + 3x²y²] + ab

Polynomials are ALWAYS separated by grouping symbols. There is one more thing you should know about subtracting polynomials. Whenever you are subtracting polynomials, you just distribute the negative to avoid confusion.

I am joyous to assist you anytime.

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)