Guys please help me i will give brainlest

Find the standard error for the line and data set.

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)