2r-3r+10=20
Move all terms to the left:
2r-3r+10-(20)=0
add all the numbers together, and all the variables
-1r-10=0
move all terms containing r to the left, all other terms to the right
-r=10
r=10/-1
r=-10
It has to be 438 because any number that is 5 or higher must be rounded up so 438 could be rounded up to 440
Answer: #3) 6 feet.
#4) 10 centimeters. #5) JK. #6) V. #7) SV
Step-by-step explanation: look for the corresponding orders between the two shapes.
Angles and segments are written in order so that they correspond to the congruent angles and segments of the corresponding shape. Example: in question #2, triangle PQR is congruent to triangle STU. This means that P in triangle one corresponds to S in triangle 2. Q corresponds to T and R corresponds to U. This is true for any shape that is congruent.