Add -7mn +5, 12 mn+2, 9mn -8,- 2mn-3​

7+5+12+2+9+2+3=40mn

4mn - 6

Step-by-step explanation:

expressions => (-7mn) + 5, 9mn - 8, -2mn - 3

In addition, we get (-7mn + 9mn - 2mn) + (-3 - 8 + 5)

4mn + (-6)

=> 4mn - 6

Hope it helps.

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.