Find two consecutive negative integers whose product is 90

-10, -9

Step-by-step explanation:

Let x = first negative answer

then

x+1 = second negative answer

x(x+1) = 90

x^2 + x = 90

x^2 + x - 90 = 0

(x+10)(x-9) = 0

x = (-10, 9)

Since we're looking for a negative answer, throw out the positive answer leaving:

x = -10 (first negative number)

.

Second negative number"

x+1 = -10+1 = -9

pi x^2

step-by-step explanation:

pi times x squared

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.