Solve the equation 4c^2 + 7c – 5 = 0 using the quadratic formula

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

How do i i solve this equation? -18 = x/3 + 3