8x + 42 = 90
8x = 90 - 42 = 48
x = 48/8 = 6 answer
Answer: 
Step-by-step explanation:

Answer:
PR = 39 cm
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
PR² + PQ² = QR² , that is
PR² + 80² = 89²
PR² + 6400 = 7921 ( subtract 6400 from both sides )
PR² = 1521 ( take the square root of both sides )
PR =
= 39
The equation of line passing through (2, -2) and parallel to
is 
<em><u>Solution:</u></em>
We have to find the equation of line passing through (2, -2) and parallel to 
<em><u>The equation of line in slope intercept form is given as:</u></em>
y = mx + c ------- eqn 1
Where "m" is the slope of line and "c" is the y-intercept
On comparing the given equation of line
with eqn 1,

We know that slope of a line and slope of line parallel to it is always equal
Therefore, slope of line parallel to given line is also 
Substitute (x, y) = (2, -2) and
in eqn 1

Substitute c = -1 and
in eqn 1

Thus equation of line parallel to given line is found