Solving for h 7a=10-2h

First you solve for a: a=(10-2h)/7 which you then plug into "a": (10-2h)/7=10-2h
Then you multiply both sides by 7 to get ride of the 7: 10-2h= 70-14h then you add the 14h to the -2h. 10+12h= 70 then you subtract to from both sides 12h=60 then you divide both sides by 12 12h/12=60/12 which then makes h= 5 and that is your answer (the value for h is 5)

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )