Mark the following as either TRUE or FALSE cos? 2 + sinº x = cos (2.c)
sin (x) cos (x) = sin (2x)
sinº (2)
1 - 2 sin? (x) = sin (2x)
cos(2x)-1
2
C
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attempt 1 out of problem 1 out of max 1

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

In the geometric progression –3, 12, −48… what term is 3,072?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?