One way to solve this question is through trigonometry. :)
If you've learnt trigonometry, here are the basic formulas:
SOH CAH TOA (These formulas only apply for right-angled triangles)
Sin(angle) = (Side that is Opposite of angle)/(Hypotenuse)
Cos(angle) = (Side that is Adjacent of angle)/(Hypotenuse)
Tan(angle) = (Side that is Opposite of angle)/(Side that is Adjacent of angle)
In this case, we should use sine of b (the angle at the top of triangle as indicated in your question), where the opposite side is the base (I.e. 4 indicated in your question) and the hypotenuse is 9.
sin(b) = 4/9
{Make angle b the subject of the equation}

{Type this into the calculator}
Angle b = 26.4° (rounded off to 1 decimal place)
Hope this helps! :)
Answer:
it goes up by 9 and a half
Answer:
x > 2
Step-by-step explanation:
Subtract one from both sides to get the answer above.
To graph it, choose the open arrow pointing right and drop it over 2.
Answer:
x=1, x=3
Step-by-step explanation:
y=x^2-4x+3
y=(x-1)(x-3)
x=1, x=3
Answer:
255 3/10
Step-by-step explanation: