Answer:
The rule is 
Step-by-step explanation:
The ordered for Larry's inputs and the corresponding outputs displayed by the calculator are:
(1, 5), (2, 9), (3, 13), (4, 17)
We use the y-values of the ordered pairs to obtain the rule.
The y-values are:

The y-values form a sequence. The first term of this sequence is:

The common difference of this sequence is

The rule is given by:

We substitute the values to obtain:


The rule is 
Answer:
Angle 8
Step-by-step explanation:
So, adjacent means next to each other, so angle 8 is also adjacent to angle 9 :)
Answer:
D. Isosceles triangle
Step-by-step explanation: Triangles have 180 degrees. To figure out this question you have to find the measure of the last angle. 70+55=125. 180-125=55. So the angles are 70, 55, 55. In an isosceles triangle two sides are equal. Because we know that two angles in the triangle are equal we then know that two sides of the triangle are also equal. Hope this helped :)
Percent formula : is/of = %/100
18 is what percent of 20...
is = 18
of = 20
% = x
sub and solve
18/20 = x/100
cross multiply
(20)(x) = (100)(18)
20x = 1800
x = 1800/20
x = 90 <=== so 18 is 90% of 20
-3/4 = -0.75
5/8 = 0.625
-1/2 and 0.9 are between them