Mrs. Hallmark wants to sell a box of two varieties of birthday cards for $5.80. The number of 30 cent cards is six more than
one half the number of 35 cent cards. How many 35 cent cards
are in the box?
8
None of these
12
10

What is the answer to |-2x-5|-|-4+8| and x=7

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)