What is 15 700 000 rounded to the nearest hundred thousandth

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m