Four times a number increased by one is between a negative seven and thirteen. Find all numbers.

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!