Chris claims that for any given values of x, the gradient of the curve y=2x^3 + 6x ^2 - 12x +3 is always greater than the gradient of the curve y=1 + 60x - 6x^2 ". show that chris is wrong by finding all the values of x for which his claim is 'not' true.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Ten times the square of a non-zero number is eqaul to ninety times the number

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.