Which two characteristics of data always occur together?
a) high accuracy and high precision
b) high precision and good validity
c) low accuracy and low precision
d) high accuracy and good validity

high accuracy and good validity

Step-by-step explanation:

Accuracy predicts how close the value of a data is true hence high accuracy suggests that the values are too close to the actual values. Similarly, data are valid if they show reality and are a product of good procedure with the right instruments. This shows that  the validity of the data is proven when they are accurate

marco saved more.   he saved $35 more.

step-by-step explanation:

1+2+3+4+5+6+7+8+9+10 = 55

2*10 = 20

55-20 = 35

it would be 6xy and -16xy.