Answer:
f(-5)= 90, g(7)= -3x+4
Step-by-step explanation:
First Solve f(x)
f(x)= 3×^2-3x
Plug in -5 to the x
3(5)^2-3(-5)
f(x)= 90
Then Solve g(x)
g(x)=-3x+4
Plug in the 7 in the x
g(x)=-3x+4
g(x)=17
Answer:
8.00 (3 s.f.)
Step-by-step explanation:
The formula for the area of a circle is:
Thus, the radius can be found by substituting A with 200.96:
We ignore the negative solution as it is impossible for the radius to be a negative value.
Yes, they are.
You're not changing anything fundamental about them. They're just flipped expressions.
<em>5) x = 8</em>
<em>6) z = 49°</em>
- <em>Step-by-step explanation:</em>
<em>Hi there ! </em>
<em>5)</em>
<em>we have opposite angles =></em>
<em>5x = 2x + 24</em>
<em>5x - 2x = 24</em>
<em>3x = 24</em>
<em>x = 24 : 3</em>
<em>x = 8</em>
<em>6) </em>
<em><u>The sum of the three interior angles in a triangle is always 180° !</u></em>
<em>x = 180° - (28° + 39°)</em>
<em>= 180° - 67°</em>
<em>= 113°</em>
<em />
<em>x ; y = supplementary angles => </em>
<em>x + y = 180° => </em>
<em>y = 180° - x</em>
<em>= 180° - 113°</em>
<em>= 67°</em>
<em />
<em>z = 180° - (64° + 67°)</em>
<em>= 180° - 131°</em>
<em>= 49°</em>
<em />
<em>Good luck !</em>
<em />
