Answer:2.5
Step-by-step explanation:
Answer:
If the battery starts completely charged then after one hour it will be at 80% so at two hours it will be at 60. and there is 60 minutes in one hour so it goes down 10% in 30 minutes so it goes down 5% in 15 so it goes down 2.5% in 7.5
The triangles in question 15 are proportional, so they are similar. Meaning that their angles are the same, so <B=<E, or <B=30 degrees.
For #17, the formula for the area of a circle is a=pi*r^2. The radius, in this instance, is 1/2 of 27, or 13.5. Plug it into the formula: a=pi*13.5^2. a=pi*182.25. If you want to simplify it further, a=572.265.
#19, same formula as #17. a=pi*r^2. a=pi*6^2. a=pi*36. a=113.04 or 113m^2.
#20, Wow this is a complicated one. Anyway, the area of the square in the middle is obviously 9m. The area of all of the circles is a=pi*1.5^2 DIVIDED BY TWO, since they're half circles. a=pi*2.25/2, a=7.065/2. a=3.5325. Since there are 4 of them, multiply that number by 4... 14.13. Add 9 to that to get the area of the whole figure: 23.13m(^2). Hope this helps.
For 5., it number machine is -4. You would then subtract 4 from 3 giving you a negative number. 3-4=-1, -1-4=-5, and -5-4=-9. The answer for 5. would then be -1, -5, -9.
For 6., it looks like you are dividing by two each time. 6 divided by 2 is 3. 3 divided by 2 is 1.5, and 1.5 divided by 2 is.75. so the answer is 3,1.5,.75.
Hope this helps!
First you take -3 and add itself to get 6x = -48. Then you simply divide 6 into -48 and you get x = -8
