Hi Rita,
As a Bubbe (grandmother) myself I'd answer it this way:
"Do you remember last year when it was almost your ___th birthday? One month or so before the big day we started saying that you were almost __(the next age). We estimated and to do this we rounded the number...

This is a distribution problem. Think of the 7 as something that will effect both things inside the parentheses. 7 (b + 3) = 7 times b plus 7 times 3 or 7b+21
Distribution can also happen when the parentheses come first; as in (3 - x) 4 = 12- 4x
And...

Lines can be defined in three ways:
1) the standard form Ax + By = C
2) the slope-intercept form Y = mX + b where m is the slope of the line and b is the Y intercept
3) the point slope formula with uses a point and the slope of the line in the form Y-Y1 = m (X-X1)
The point...

Many standardized tests, including the SAT, ACT, GRE and GMAT do allow the use of a calculator, and I believe the ASVAB should too. I posed this argument to the Department of Defense in October of 2011 and an aide to the Undersecretary of the US Navy wrote back stating that it was under consideration...