In which of the following situations will you typically not have to reduce your speed on an expressway? a. the number of lanes is increasing b. there is a toll booth ahead c. you are entering an exit ramp

A) You will not have to reduce your speed if the number of lanes is increasing.

If there's a toll booth, you'll have to eventually stop to pay the toll and there may be traffic, so you will have to reduce your speed. If you're entering an exit ramp, it is a curved turn, so you will have to reduce your speed to be safe, usually there is a suggested speed limit as well.

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer