What is a simpler form of the expression?

(2n2 + 5n + 3)(4n - 5)

a. 8n^3 + 10n² - 13 n - 15
b. 8n^3 + 30n² - 37n - 15
c. 8n^3 - 10n² + 37n - 15
d. 8n^3+ 13n² - 10n -15

What is the value of the digit 1 in the number 13?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?