Answer:
c= 60m (nearest whole number)
Step-by-step explanation:
Please see the attached picture for full solution.
sinθ= opp/ hyp (SOH)
cosθ= adj/ hyp (CAH)
tanθ= opp/hyp (TOA)
Answer:
7
Step-by-step explanation:
a=2
b=2
c=1
2ab cos C=a²+b²-c²=2²+2²-1²=4+4-1=7
Answer:250 N
Step-by-step explanation:
Given
mass of skater on left side 
mass of skater on right side 
If the skater on the left experience a force of 
If they push against each other then they must experience an equal force according to newtons third law
Thus 
Thus skater on right experience
force
Most quadratic functions(which is what you have there, to a degree of 2) are solved using factoring and the zero product law. If you can not factor then you have to use the quadratic formula or graph it. However this one can be factored.
It's pretty simple to just factor it by inspection but I use the chart method, if you know decomposition that works as well.
Factoring gives us,

Then you set each factor to 0 and solve for x,



And the second one,


The solutions to this equation are
x = -1/2, 3