Sum of polynomials?
(m+n+3) + (m+n+4)

a.-1
b. m2+n2+7
c.2m+2n+7
d.2m2+2n2+7

 Option 'C' is correct.

Explanation:

Since we have given that

We need to calculate the sum of polynomial for which we will group the like terms and add them.

So,

We first grouping the like terms , i.e.

Now, add the like terms, we get

Therefore, the sum of above polynomial is

Hence, Option 'C' is correct.

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

answer: a

step-by-step explanation: