Which expression has a value of 2, using only four 4s and any of the following : + , – , · , ÷, exponents, and/or parentheses

a. (4+4) + (4÷4)

b. (4÷4) · (4÷4)

c. (4÷4) ÷ (4÷4)

d. (4÷4) + (4÷4)

Find the slope of the line that passes through the points (-3, -1) and (0, 3). 3/4 0 4/3

Which of the following is an arithmetic sequence

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