anonymous one year ago Guys i might not pass grade ;( im taking virtual school and need to finish a practice test so i can move on and school is really close if any of you are nice enough to take some time out of your day to help me with a few problems let me know :)

1. anonymous

@Queenbee448 @Australopithecus @badmood @CausticSyndicalist @Donblue @elcna @frankwillfindyou @Guanto_puffy_ @Hero @inkyvoyd @Jadeishere @kropot72

2. anonymous

What class and what problems?

3. anonymous

4. anonymous

name some!

5. anonymous

A box is 20 cm long. Which of these is closest to the length of this box in feet? (1 inch = 2.54 cm) 0.66 foot 0.75 foot 1.66 feet 7.87 feet

6. anonymous

A dance school has 63 ballet dancers. If 42% of the total number of dancers in the school are ballet dancers, what is the total number of dancers in the school? 105 150 160 165

7. anonymous

the first question is 7.87

8. anonymous

Thanks :D

9. anonymous

i think the next question is 150

10. anonymous

Point A is at (3, 2.7) and point B is at (3, 1.4) on a coordinate grid. The distance between the two points is ____. Input numbers and decimal point only, such as 5.8.

11. anonymous

The coordinates of point P on a coordinate grid are (−5, −6). Point P is reflected across the y-axis to obtain point Q and across the x-axis to obtain point R. What are the coordinates of points Q and R? Q(5, 6) and R(−5, −6) Q(−5, −6) and R(5, 6) Q(−5, 6) and R(5, −6) Q(5, −6) and R(−5, 6)

12. Australopithecus

For unit conversion: See this video: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/metric-system-tutorial/v/unit-conversion As for finding the distance between points you just use Pythagorean theorem $( (x_2 - x_1)^2 + (y_2 - y_1)^2 + (z_2 - z_1)^2 )^{\frac{1}{2}} = distance$ see: http://www.purplemath.com/modules/distform.htm For the last problem you posted I recommend graphing the point, also by reflected it means that if you were to fold the graph paper in half along the y axis both points would be overlapping for example: |dw:1438134584455:dw|

13. anonymous

Oh ok ill watch the videos thanks :D

14. Australopithecus

I made a mistake in the graph, as far as the coordinates If you were reflect the point (2,1) about the y axis you would get point (-2,1) |dw:1438134703836:dw|

15. Australopithecus

As you see if you folded the graph in half about the y axis both (-2,1) and (2,1) would be overlaping

16. Australopithecus

that is what is meant by reflected

17. anonymous

So then will it be the third answer?

18. anonymous

@Australopithecus

19. Australopithecus

look at my example or watch this video: https://www.khanacademy.org/math/basic-geo/basic-geo-coordinate-plane/copy-of-cc-6th-coordinate-plane/v/reflecting-points-exercise