Answer:
x = (-5 ± 2√10) / 3
Step-by-step explanation:
5 − 10x − 3x² = 0
Write in standard form:
-3x² − 10x + 5 = 0
Solve with quadratic formula:
x = [ -b ± √(b² − 4ac) ] / 2a
x = [ -(-10) ± √((-10)² − 4(-3)(5)) ] / 2(-3)
x = [ 10 ± √(100 + 60) ] / -6
x = (10 ± 4√10) / -6
x = (-5 ± 2√10) / 3
Answer:
x-7
Step-by-step explanation:
(x-7) is the translation of the expression "the difference of a number and seven" using x as a placeholder, or variable for "a number"
If 12 pairs of socks sell for $5.79, then the unit rate is 12 : 5.79. If we want to find a unit rate for one pair of socks, we need to divide 5.79 by 12:
5.79 / 12 = 0,4825
So the unit rate is 1 : 0.4825
Answer:
h=-16t^2+ 30t+4.
Step-by-step explanation:
For the table you just plug in the <em>t</em> (time) into the equation. So for the first one we have 0 seconds. So you plug in the 0 where it says <em>t</em>. So the equation becomes h=-16*0^2+30*0+4. Which gives us 4 <em>h</em>(height). Then you keep pluging in the time into the equation.
Time <em>t </em>in seconds 0 .5 1 1.5 2
Height <em>h </em>in feet 4 15 18 13 0
Your answer's 25
You have to divide 125 times 5 to get your answer of 25
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Hope this helps</u></h2>
