Sylvia ran 3km 290m in the morning then she ran some more in the evening if she ran a total of 10km how far did sylvia run in the evening

Ashopper bought a watermelon a pack of napkins and some paper plates in his state there was no tax on food the tax rate on non-food items is 5% the total for the three items he bought was 825 before tags and he paid $0.19 in taxes how much did the watermelon cost

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

What is x and y intercepts for y=x+7