Answer:
13x
Step-by-step explanation:
The product of 13 and x would be 13*x or just simply 13x.
Answer 5 because cos(60) x 10 = gives 5
Answer:
D
Step-by-step explanation:
a perfect square trinomial is

factorized is

so as you can see option A and B can't be, because they have -49y^2 and it has to be plus
so the other options are C and D
in the trinomial a=4 and b=\pm 7
the roots of a^2 and b^2

so it's option d with b=-7

Answer:
= this is that two expression two equal numbers