Answer:
48
Step-by-step explanation:
Complementary angles add to 90 degrees
A+B =90
5x+22 + 10x+8 = 90
Combine like terms
15x + 30 = 90
Subtract 90 from each side
15x +30-30 = 90-30
15x = 60
Divide by 15
15x/15 = 60/15
x =4
B = 10x+8
=10*4+8
= 40+8
= 49
Answer:
Part a) Is a positive correlation
Part b)
Part c) see the explanation
Step-by-step explanation:
Let
x ----> the number of items sold
y ----> the money spent on advertising
Part a) How would you characterize the relationship between money spent on advertising and items sold?
we know that
Positive correlation is a relationship between two variables in which both variables move in the same direction
so
As the value of x increases, the value of y increases
therefore
Is a positive correlation
Part b) Sally uses the function y = 1.6x + 21.5 to model the situation. What score does the model predict should be spent in advertising to sell 30 items?
we have
For x=30 items
substitute the value of x in the linear equation and solve for y
Part c) What does the number 21.5 in Part (b) mean in the context of the situation?
we have
This is a linear equation in slope intercept form
where
The slope is
The y-intercept or initial value is
therefore
In the context of the situation the number 21.5 means the initial amount spent at the begin (when the number of items sold was zero)
Answer:
58
Step-by-step explanation:
the answer is 100+102+104+106+108=520
The middle one is number 104