Answer:
The coefficient of the 2nd term of trinomial is 18.
Step-by-step explanation:
You can expand in a faster way by using the formula, (a+b)² = a²+2ab+b² :
(3x+3)² = (3x)² + 2(3x)(3) + 3²
= 9a² + 18a + 9
OR
You can expand it by doing step by step :
(3x+3)² = (3x+3)(3x+3)
= 3x(3x) + 3x(3) + 3(3x) + 3(3)
= 9x² + 9x + 9x + 9
= 9x² + 18x + 9
Answer:
*hugs
Step-by-step explanation:
3 67/100
3 will stay a whole number so you put that as the whole number. 67 is 67 percent of a whole. so you put it over 100.
Answer:
4 kilometers
Step-by-step explanation:
<em>First! Let's create an equation, with our variable (x) representing the number of additional fifth kilometers Dan can afford. </em>
2 + 0.40x = 9.60
<em>Now, we have to solve for our x value by subtracting 2 from both sides.</em>
0.40x = 7.60
<em>Next, we can divide both sides by 0.40 to find out what our x value is equal too.</em>
x = 19
<em>Don't forget this x value is just for the number of </em><em>additional</em><em> fifth kilometers Dan can afford on top of his first fifth mile.</em>
<em />
<em>So! Dan can afford 20 fifth kilometers, which in turn in is 4 kilometers in total. </em>
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Hope this Helps! :)
<em>Have any questions? Ask below in the comments and I will try my best to answer.</em>
-SGO
Answer:
(a) 2.27 lb/$
(b) 0.10 mi/min
Step-by-step explanation:
<h3>(a)</h3>
Pounds per dollar is found by dividing pounds by dollars:
(25 lb)/($11.00) ≈ 2.272727... lb/dollar
The digit in the thousandths place is less than 5, so that digit and all digits to its right are dropped when rounding to hundredths.
2.27 pounds per dollar
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<h3>(b)</h3>
Speed in miles per minute is found by dividing miles by minutes:
(6 mi)/(58 min) ≈ 0.103448... mi/min
Rounding to hundredths is done the same way as above.
0.10 miles per minute
_____
If the digit to the right of the place you're rounding to is 5 or more, then 1 is added in the place you're rounding to when digits to its right are dropped.
