Its timed i need

1.

select the correct answer.

vertex a in quadrilateral abcd lies at (-3, 2). if you rotate abcd 180° clockwise about the origin, what will be the coordinates of a′ of the rotated quadrilateral a′b′c′d′?

a.

(3, -2)

b.

(-3, 2)

c.

(-2, 3)

d.

(-3, -2)

2.

drag the tiles to the correct boxes to complete the pairs. not all tiles will be used.
you rotate triangle abc, with vertices a(-3, 1), b(-2, 2), and c(-3, 4), 90° counterclockwise about the origin to form triangle a′b′c′. match each vertex of triangle a′b′c′ to its coordinates.

(2, 2)
(-1, -3)
(1, 3)
(4, 3)
(-2, -2)
(-4, -3)
a′ >

b′ >

c′ >

3.

select the correct answer.
triangle abc, with coordinates a(2, 3), b(3, 5), c(7, 4), is dilated by a scale factor of 2. what are the coordinates of the dilated figure, triangle a′b′c′?

a.
a′(4, 6), b′(6, 10), c′(7, 4)
b.
a′(2, 3), b′(3, 5), c′(7, 4)
c.
a′(4, 6), b′(6, 10), c′(14, 8)
d.
a′(4, 6), b′(3, 5), c′(14, 8)

4.

triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x′y′z′, with vertices x′(4, -2), y′(4, -3), and z′(1, -4). the type of transformation that triangle xyz undergoes is a

triangle x′y′z′ then undergoes a transformation to form triangle x′y′z′, with vertices x″(4, 2), y″(4, 3), and z″(1, 4). the type of transformation that triangle x′y′z′ undergoes is a

5.

select the correct answer.

you reflect triangle pqr, with vertices p(-2, -4), q(-3, -1), and r(-4, -4), across the y-axis to get triangle p′q′r′. what are the coordinates of triangle p′q′r′?

a.
p′(-2, 4), q′(-3, 1), r′(-4, 4)
b.
p′(2, -4), q′(3, -1), r′(4, 4)
c.
p′(-2, 4), q′(-3, 1), r′(4, -4)
d.
p′(2, -4), q′(3, -1), r′(4, -4)

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

In january 2010, you began a one-year study of tuberculosis (tb) in a subsidized housing community in the lower east side of new york city. you enrolled 500 residents in your study and checked on their tb status on a monthly basis. at the start of your study on january 1st, you screened all 500 residents. upon screening, you found that 30 of the healthy residents had been vaccinated for tb and therefore were not at risk. another 20 residents already had existing cases of tb on january 1st. on february 1st, 5 residents developed tb. on april 1st, 10 more residents developed tb. on june 1st, 10 healthy residents moved away from new york city and were lost to follow-up. on july 1st, 10 of the residents who had existing tb on january 1st died from their disease. the study ended on december 31, 2010. assume that once a person gets tb, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up. is the subsidized housing community in the lower east side of new york city a dynamic or fixed population? briefly explain the rationale for your answer. dynamic population it can changeable people can move out and move in into the population of a subsidized housing what was the prevalence of tb in the screened community on january 1st? prevalence = 30/500 0.06= 6% what was the prevalence of tb on june 30th? prevalence= 40/450=0.08= 8.88% what was the cumulative incidence of tb over the year? cumulative incidence = number of new cases/number in candidate population)over specified time period 10/450 = 2.2% suppose that you wanted to calculate the incidence rate of tb in the study population. calculate the amount of person-time that would go in the denominator of this incidence rate. be sure to show your work.