1.A cell phone is advertised for 25% off the list price of D dollars. Write an algabraic expression that represents the sale price of the phone? 2. A car travels for 10 hours at an average speed of s miles per hour, write an algabraic expression that represents the total distance traveled by a car.

$0.75D ; 10s miles

Step-by-step explanation:

1)

Given that:

List price of phone = $D

Advertised price = 25% off the list price

Hence, sales price of phone :

(100% - 25%) × list price

Sales price = 75% × $D

Sales price = $0.75D

2)

Given that :

Time of travel = 10 hours

Speed of travel = s miles per hour

Total distance traveled = (speed of travel × time of travel)

Total distance traveled = (10 * s) miles

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.