Bethany can mow her family’s lawn in 4 hours. her brother collin can mow the lawn in 3 hours. which equation can be used to find x, the amount of time it would take for bethany and collin to mow the lawn together?

The correct answer is d, hope this

1.   an exact solution requires a radical solution - no decimal approximation.2. (a)4x^3 = 756x^3 = 756/4 = 189x =   cube root of 189 =   5.74   to nearest hundredth answer(b)   189 = 3*3*3*7   so we can write the cube root of 189 as 3∛7 answerchecking (a) 4*(5.74^3 =   756.48   which is very close(b)   4* ((3∛3)^3   = 4*189   = 756   - spot on! 3. i would use solution b because the original question asked for an exact solution.

64=4x+460=4x15=xsarah is 15 years old