Rewrite the following quadratic equation in factored form, such as y=(x-a)(x-b)

Step-by-step explanation:

y = x^2 - x - 72

y = (x - 9)(x + 8)

You want two numbers that multiply to 72 --   -9 and 8

You want two numbers that differ by -1    -9 + 8 = - 1

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.