I can do 15, 17 and 18.
15. (x+5)+4x=180 (A line is 180 degrees.)
you can subtract 5 from 180 to get 175.
4x+x =175
5x=175
divide 5 to get x=35
plug 35 into x to get 40 and 140.
17. Same thing with the line = 180 degrees
6x-4+4x-6=180
10x-10=180
combine like terms.
10x=190
add 10 to both sides
x=19
divide 10.
plug 19 in 6*19-4=110, so y=110 (since parallel lines)
and 4*19-6=70
19. y=90 (the square means 90 degrees)
x-7+3x-3=90 (since 90+90=180)
4x-10=90 (combine like terms)
4x=100 (add 10)
x=25
plug it in again to get 25-7=18 and 3*25-3=72
Answer:
__
0.333
Step-by-step explanation:
you divide 1.00 by 3. The 3s never end.
Answer:
- 1.25 hours or 1 hour and 15 minutes
Step-by-step explanation:
<em>Question</em>
- <em>Lisa lit a candle with a height of 8 inches. When lit, this candle loses 10% of its original height every hour. </em>
- <em>Please complete the following sentence by writing the number in the blank.
Until the candle has been burning for at least _______ hours, the height of Jennifer's candle will be more than 7 inches.</em>
<u>Candle looses 10% of 8 inches, it equals:</u>
- 8*0.1 = 0.8 inches an hour
<u>Let x be required time, then:</u>
- 8 - 0.8x > 7
- 0.8x < 8 - 7
- 0.8x < 1
- x < 1/0.8
- x < 1.25
- or 1 hour 15 minutes
Answer:the length of the shorter string= 36cm
Step-by-step explanation:
Let us assume the lengths are 2x and 7x since thery are in the ratio of 2 :7
Such that Length of the shorter string = 2x
and the longer string = 7x so that the difference in Length which is 90cm can be expressed as
7x- 2x= 90
5x= 90
x 90/5
x= 18
shorter string = 2 x = 2x 18= 36cm
Longer strring = 7x 18=126cm
Answer:
~Exponential decay because the base is less than 1~
Step-by-step explanation:
I just took the test and got a 100% :) hope this helped! Good luck!