I believe its 45 because a right angle equals 90 degrees and if you multiply 45 and 2, it'll give you a right angle(90 degrees)
Answer:
Teachers to Students: 1:9, 1 to 19, 1/19
Students to teachers: 19:1, 19 to 1, 19/1
(If this is wrong the answers might be different for you but this is what I got an I was right)
Complete Question:
Attached below as picture.
Answer:
From first graph there is no linear pattern so here linearity assumption violated.
From second graph there is observation is in some pattern like funnel or v shape so there is no constant variance occur that is there is no constant variance for error.
Constant variance for error occur when in residual plot all observation are in scatter everywhere.
From third graph we can say there is positive distribution but for regression analysis we need symmetric that is normal distribution.
Step-by-step explanation:
See graphs attached below.
3/9 reduces to 1/3 (divide both parts by the GCF 3)
Then use long division to divide 1/3
See attached of what I mean
Which is why

The '3's in 0.333 will go on forever
Answer:

Step-by-step explanation:

Add 9x to both sides:

Simplify:

Solve with the quadratic formula:
For a quadratic equation of the form
the solutions are:

For 


The solution to the quadratic equation are:

Hope I helped. If so, may I get brainliest and a thanks?
Thank you, have a good day!