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Marina86 [1]
2 years ago
12

What is the answer to the question

Mathematics
2 answers:
zloy xaker [14]2 years ago
6 0

Answer: 81°

Step-by-step explanation:

Angles on a straight line always add up to 180°.

So as a and 99° are on the same straight line you would have to do 180-99=81°

Hope this helps :)

asambeis [7]2 years ago
3 0

Step-by-step explanation:

\frac{360 - 2(99)}{2}  =  \\  =  \frac{360 - 198}{2}  =  \\  =  \frac{162}{2}  =  \\  = 81

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How to solve and what is the answer
TiliK225 [7]
Two ways: 
1) guess factors(trial and error)
2) use quadratic formula.
If you use this method then a = -3, b = -6 and c = -1


x = -b +/- [sqrt(b^2 -4ac)/2a]
substituting a, b, and c into our equation we get:
x = - (-6)+/- [sqrt ((-6)^2) - 4(-3)(-1))/2 (-3)]
x = + 6 +/- [sqrt (36 -4 (3)/-6)]  if I didnt make a mistake in my signs
x = + 6 +/- [sqrt (36 -12)/-6)]
x = 6 +/- [sqrt (24)/-6]  but sqrt 6 x sqrt of 4 = sqrt 24 hence
x = 6 +/-  [ sqrt 6 x sqrt 4 /-6] that is:
x = 6 +/- [sqrt 6 x 2 /-6 ]
so x = 6 + [sqrt 6 x 2/-6] and x = 6 - [sqrt 6 x 2/-6]

7 0
3 years ago
A youth club organizer is plannning a day trip for the club members. The cost of the trip is $330 and club has already saved $75
alexgriva [62]

Answer:

Step-by-step explanation:

330 = 21x + 75

7 0
3 years ago
Kevin and Randy Muise have a jar containing 70 coins, all of which are either quarters or nickels. The total value of the coins
Nikitich [7]

Answer:

50 nickels, 20 quarters.

Step-by-step explanation:

System of equations (q = # of quarters, n = # of nickels):

<em>q + n = 70, 0.25q + 0.05n = 7.50</em>

the first equation can be changed to q = 70 - n, so we are able to <em>substitute q with 70 - n</em>.

So, it will look like <em>0.25*70 - 0.25n + 0.05n = 7.50</em>. This can be simplified to <em>0.2n = 10</em>, which means that n = 50.

Knowing that we can solve <em>q + 50 = 70</em>, which means that q = 20.

6 0
3 years ago
The velocity-time graph for a cycle is shown
malfutka [58]

Answer:

<u>a) 100m</u>

<u>b) 2m/s</u>

Step-by-step explanation:

a)==>> <u>2+4</u>+<u>6+8</u>+10(8) = 100m

b)==>> Variable "a" = change OVER time (\frac{change}{time}) = 8m/4s = 2m/s

5 0
2 years ago
Pls help I’ll brainlest ASAP and add extra points
charle [14.2K]

Answer:

3 to 6 making 9 multiply by 4 giving 36

add 3 by 4 = 36

same

lmk of u hv questions

3 0
3 years ago
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