Answer:

Step-by-step explanation:


Hope this helps!
2x+3x -9. You can simplify this to 5x-9.
Answer:
23
Step-by-step explanation:
Remember PEMDAS/order of operations (Parentheses, exponent, multiplication, division, addition, subtraction)
10*1/2+(-6)(-3)
10*1/2+18
5+18
23
Answer:
Step-by-step explanation:
Factors of 20 = 1 2 4 5 10 20
Factors of 55 = 1 5 11 55
Factors of 90 = 1 2 3 5 6 9 10 15 18 30 45 90
Hcf = 5