On the first day of vacation, you read one-quarter of a novel. On the second day, you read half of the remaining pages. On the t
1 answer:
You might be interested in
Answer:
<h2>2√14</h2>Step-by-step explanation:
ΔSQR and ΔTSR are similar. Therefore the sides are in proportion:
We have:
SR = q
QR = 10 + 4 = 14
TR = 4
Substitute:
<em>cross multiply</em>
9514 1404 393
Answer:
C. 1/(4a)
Step-by-step explanation:
We assume you're comparing the vertex form ...
y = a(x -h)^2 +k
to the form used to write the equation in terms of the focal distance p.
y = 1/(4p)(x -h)^2 +k
That comparison tells you ...
a = 1/(4p)
p = 1/(4a) . . . . . . multiply by p/a; matches choice C
__
<em>Additional comment</em>
When using plain text to write a rational expression, parentheses are needed around any denominator that has is more than a single constant or variable. The order of operations requires 1/4a to be interpreted as (1/4)a. The value of p is 1/(4a).
When rational expressions are typeset, the fraction bar serves as a grouping symbol identifying the entire denominator: