? is there any more context to the question?
Answer:
(-∞, -4] ∪ [5, ∞)
Step-by-step explanation:
Hi!
Alright, so greater (or less) than or equal to is denoted with a bracket.
If x is less than or equal to -4, then the bracket is on the left side.
(___, -4]
Because x is <em>any</em> number under or equal to -4, x can range from negative infinity. However, we use a parentheses for infinity because infinity can never truly be reached.
So, x 
-4 = (-∞, -4]
X
5
Equal to = bracket
X is any number above 5, so
[5, ∞)
Because we want both of these, we use the union sign (∪)
so,
= (-∞, -4] ∪ [5, ∞)
Answer: The regression equation could have a positive or a negative slope
Explanation:
The coefficient of determination is marked as r^2. This is always positive because squaring a negative leads to a positive. Knowing something like r^2 = 0.7 does not tell us whether r itself is positive or negative, so we don't know if the regression line slope is positive or negative. We would need more info.
Let's solve it step-by-step.
5+ 2a/-3= 5/11
Step 1: Simplify both sides of the equation.
5+ 2a/-3= 5/11
-2/3a+5=5/11
Step 2: Subtract 5 from both sides.
-2/3a+5-5=5/11-5
-2/3a=-50/11
Step 3: Multiply both sides by 3/(-2).
a=75/11
So, the answer is a=75/11.
Actually it is A they are multiplying each number on the left side by four to get the answer which is on the right side therefor 9 x 4 = 36.
