=2ab - 20a -5a +10 -ab - b
= ab - 25a - b + 10
Answer:
see explanation
Step-by-step explanation:
Choose any value for x, substitute into the equation and solve for y, that is
x = - 1
2(- 1) + y = 8
- 2 + y = 8 ( add 2 to both sides )
y = 10
---------
x = 0
2(0) + y = 8
0 + y = 8
y = 8
----------------
x = 1
2(1) + y = 8
2 + y = 8 ( subtract 2 from both sides )
y = 6
---------------
x = 3
2(3) + y = 8
6 + y = 8 ( subtract 6 from both sides )
y = 2
----------------
4 possible solutions are (- 1, 10 ), (0, 8 ), (1, 6 ) and (3, 2 )
Step-by-step explanation:
AM switches to PM at 12 PM.
so, we need to calculate the time from 9:23 am to 12 pm, and then from 12 pm to 2:06 pm, and then add both for the overall answer.
the first full hour after 9:23 am is 10 am. from there it is 2 hours to 12 pm.
how many minutes from 23 minutes to 60 (of the next full hour) ? 60 - 23 = 37 minutes.
so, it is 2 hours and 37 minutes until 12 pm.
and from 12 pm to 2:06 pm it is 2 hours and 6 minutes.
the total time is then
2 hours 37 minutes + 2 hours 6 minutes =
= 2 + 2 hours 37 + 6 minutes = 4 hours 43 minutes
FYI
if the sum of the minutes would have been larger than 60 (like e.g. 53 + 12), then we would have had to add another hour as a carry over, and take the remainder of minutes/60 as minutes.
e.g.
2 hours 53 minutes
3 hours 12 minutes
would sum up to
5 hours 65 minutes = 6 hours 5 minutes
To calculate the sine of an angle, simply divide the length of the opposite side, 479.16, by the length of the hypotenuse, 610. To get the cosine, divide the length of the adjacent side, 377.5, by the length of the hypotenuse, 610.
600 and 60 I do not know what to do