Answer:
5
Step-by-step explanation:
The 6th term of an arithmetic progression is 35 and the 13th term is 77. find the 1st term
We know we have an arithmetic sequence.
a_n = (n - 1)*d + a_1
given:
a_6 = 35 = (6-1)*d + a_1
a_13 = (13 -1)*d + a_1 = 77
find a_1
we have 35 = 5d + a_1
and 77 = 12d + a_1
2 equations in 2 unknowns.
We can solve this.
77 = 12d + a_1
35 = 5d + a_1
minus the 2 equations from each other.
77 - 35 = 12d - 5d + a_1 - a_1
42 = 7d
d = 6
Find a_1
35 = 5*6 + a_1
35 = 30 + a_1
a_1 = 35 -30 = 5
a_1 = 5
Answer:
12a²b²
Step-by-step explanation:
hope it helps .
use algebra
So I know some of them but not all them sorry
5. If m<5=70 then m<6= <em><u>20</u></em>
<em>Why? </em> Because there is a 90 degree angle there and if m<5 is 70 all you have to do to get m<6 is subtract 70 from 90 and you get 20 degrees
6. If m<5=70 then m<1= <em><u>90 </u></em> and m<4=<em><u>90 </u></em>
<em>Why? </em>Because you can see based on the drawing that they form right angles
4a. FGK is right angles
4b. The measure of FGK is 90 in total
<em>Why? </em> It has the right angle
Hope this helps:) this was all I could remember
First one is 672 the second one is 1008 the third one is 1344 the last one is 1512
Answer:
B.) 
Step-by-step explanation:
A negative and a negative equals a positive. Remove parentheses and simplify
Done.
