If a+3b=13 and a+b=5 the value of b is

b = 4

Step-by-step explanation:

a + 3b = 13

a + b = 5 multiply by -1

a + 3b = 13

-a - b = -5 (result of multiplying by -1)

add

2b = 8

b = 8/2

b = 4 <

a + b = 5

a + 4 = 5

a = 5 - 4

a = 1

hi there!

1. define: accuracy

a) how close a measured value is to the actual (true) value.

hope this : )