Answer:
I dont know what your asking, for the other angle? Ig so. Answer: THE OTHER ANGLE IS 26. :)
Step-by-step explanation:
64 + 90 = 154.
All triangles add up to 180 degrees.
180-154 = 26.
Answer:
an = 115 + (n - 1) (-6)
a25 = - 29
Step-by-step explanation:
We use the definition for the nth term of an arithmetic sequence:
an = a1 + (n - 1) d
a5 = 91 = a1 + (5 - 1) d
91 = a1 + 4 d
a20 = 1 = a1 + (20 - 1) d = a1 + 19 d
1 = a1 + 19 d
now we subtract term by term one expression from the other
90 = 4 d - 19 d
90 = - 15 d
divide both sides by -15 to isolate d
d = 90 / (-15) = -6
Now we can calculate what a1 is using for example:
1 = a1 + 19 d
1 = a1 - 114
add 114 to both sides:
115 = a1
Then our general expression for the sequence is:
an = 115 + (n - 1) (-6)
We can now use it to calculate the value of a25:
a25 = 115 + (24) * (-6) = -29
Answer:
7. B
8. D
Step-by-step explanation:
Answer: (-5, -3)
Step-by-step explanation: In a reflection over the x-axis, the x-value remains the same, the y-value changes to the opposite sign.
If X is congruent to Z then they have to be the same number, then you add them and the result you substract it from 180 and that equals Y (remember that the sides of a triangle add up to 180)
