Use cross products to demonstrate whether the two ratios are equivalent 4/6 and 14/21

The constant of proportionality is always the where k is the constant of proportionality. additionally, you can find the constant of proportionality by finding the ratio for any point onasap

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

Which expression is equivalent to 64 - 9x^2?