83. according to an article in newsweek, the natural ratio of girls to boys is 100: 105. in china, the birth ratio is 100: 114 (46.7% girls). suppose you don’t believe the reported figures of the percent of girls born in china. you conduct a study. in this study, you count the number of girls and boys born in 150 randomly chosen recent births. there are 60 girls and 90 boys born of the 150. based on your study, do you believe that the percent of girls born in china is 46.7?

< 4, -5>

step-by-step explanation:

starting from g. we move 4 right and then 5 down to get to h. that means the vector is < 4, -5>

56

step-by-step explanation:

a

step-by-step explanation:

third choice down

step-by-step explanation:

the first inequality is based on the number of adults and campers, and the second inequality is based on the cost of feeding both the adult and the camper.

we know that there is room for 525 people max.   it's ok to have less than 525, but it's not ok to have more than 525, so the inequality is less than or equal to.   the number combination of adults (x) and campers (y) cannot exceed this 525 max.   therefore:

x + y ≤ 525

now we talk about cost.   it costs $9 to feed one adult, so depending upon the number of adults you have (x) depends upon how much it will cost to feed that number of adults.   same with the campers, who cost $5 to feed.   the adults can be represented by 9x and the campers can be represented by 5y.   since the budget cannot exceed 1,200, the second inequality is:

9x + 5y ≤ 1200