Answer:
the value of X is 122
Step-by-step explanation:
First, all triangle angles add up to 180 so to find the missing angle we subtract 51 and 71 from 180 and get 58
Now we know straight lines always equal 180 as well so we subtract 58 from 180 and get 122 and that is the value of x
Answer: - 5120
Step-by-step explanation:
The first thing is to find the common ratio , since it is a geometric sequence.
common ratio ( r ) = second term / first term
r = -10/-5
r = 2
Using the formula for the nth term of a geometric sequence ;
= a
The 11th term will thus be:
= -5 X 
= -5 x 1024
= -5120
Answer:
b.
Step-by-step explanation:
The expression b is a function because the x values are all different.
In fact it is a one-to-one function as there is a different value of y for each value of x.
1. 0.3z-13-4z+6.7
0.3-4z=-3.7z
-13+6.7=-6.3
simplified- -3.7z-6.3
2. 3x+1+6x-2+3x+1+6x-2= 18x-2
3. don’t know this one
4. 5(t-1.25) = 8.75
5t-6.25=8.75
5t=8.75+6.25
5t=15.00
t=3
