What is the value of 3x^2+4y^2 if x=2,y=1 and z=-3

ANSWER

16

EXPLANATION

The given expression is;

If x=2, y=1 and z=-3, we substitute the values into the expression and solve.

We substitute to obtain;

We evaluate to get;

We multiply out to get:

Therefore the value of the given expression is with the given values is 16

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh