What’s the answer? and how do I do this ?

Choice C (x+2)(x+5)

Step-by-step explanation:

Choice A: 5x-2x = 3x, not right.

Choice B: 10x+7x = 17x, not right.

Choice C: 5x+2x = 7x, right.

So the answer is choice C, the clever wouldn't waste time on calculation when you know the right answer.

But if you want to know...

Choice A: Fortunately, the coefficient for x^2 is 1 which is easy to factor

Now we see -2 and 5, you don't need to calculate, just calculate -2+5 = 3 or if you want.

[5(x)]+[-2(x)] = 5x-2x = 3x

For +10, just multiply 5 and -2 then you get -10

Choice B: Same with choice one, you can find the middle expression by,

7x+10x = 17x or in advanced way

10(x)+7(x) = 10x+7x = 17x

For the last expression, jut multiply 10 and 7, you get 70 which is not even right.

Choice C is right because 5x+2x = 7x (From 5(x)+2(x)=5x+2x=7x)

Then multiply 2 and 5 to get last expression aka 10 as you get 10

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.

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: