This question gets me confused everytime when i see this. it's called " signs of expressions challenge".
need

Negative

Step-by-step explanation:

(-2)^4 will be positive because the exponent is even.

(-3)^7 will be negative because the exponent is odd.

An positive number times a negative number is negative, so we know the result will be negative.

Look at the attached image for further clarification.

Step-by-step explanation:

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.