Andrew is showing his work in simplifying −4.5 + 4.2 + 5.6 − 7.3. identify any errors in his work or in his reasoning. write feedback to andrew explaining the mistake he made and how to correct his work.

step work reasoning
−4.5 + 4.2 + 5.6 − 7.3 original problem
1 −4.5 + 4.2 + 5.6 + (−7.3) additive inverse
2 −4.5 + (−7.3) + 4.2 + 5.6 commutative property
3 (−4.5 + (−7.3)) + (4.2 + 5.6) associative property
4 −11.8 + 9.8 simplify
5 −21.6 simplify

Vanessa earns a base salary of $400.00 every week with an additional5% commission on everything she sells. vanessa sold $1650.00 worth of items last week.

The tiles on the left contain functions written using function notation . match each function with its input

The investigating team suspected that there were differences in the cost of repairing cars in workshop i and workshop ii. the investigating team suspected that the costs raised by workshop i were greater than workshop ii. for that they tested the repair of 15 cars in each workshop to see the cost of repairs.the decision of the right hypothesis to prove the suspicion above is a. h0 : μ1- μ2­ = 0; ha : μ1- μ2­ ≠ 0 b. h0 : μ1- μ2 ≥ 0; ha : μ1- μ2 < 0 c. h0 : μd ≥ 0; ha : μd < 0 with μd = μ2- μ1 d. h0 : μd = 0; ha : μd ≠ 0 with μd = μ2- μ1 e. h0 : μ1- μ2 = 0; ha : μ1- μ2 ≥ 0