What are the sums? complete the equations. -80 + 30 = ? 80 + (-30) = ?

For each proportion find the unknown number x 1/5/8=×/15

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Of of at a : $6, $8, $7, $6, $5, $7, $5, $7, $6, $28, $30 is?ato .ato .ato .ato .