Question

math worksheet answer with explanation to understand ​

Answer 1

Answer:

(D)

Step-by-step explanation:

an= a+(n-1)d

4= a+(6)(-4)

4= a-24

a= 4+24= 28

but as 28 is not an option, thus (d) would be the answer

Answer 2

Answer:

Here, The value of a (first term) is 28.

Step-by-step explanation:

Here, As per our question,

In an A.P.,d=(-4),n=7,an=4

So, an=a+(n-1)×d

=4=a+(7-1)×(-4)

=4=a+6×(-4)

=4=a-24

=a=4+24

=a=28

So, Here, The value of a (first term)=28.

Thank you.