Answer: B
Step-by-step explanation:
Answer:
B: $90.
Step-by-step explanation:
The expression for this problem can be represented as
Total Cost = $44 + 2c
Since one chair costs $23, the total cost would be:
Total Cost = $44 + 2($23)
2 × 23 = 46
Total Cost = $44 + $46 = $90
The total cost is $90, choice B.
<span>Note that the mean (78 +90 +456 +676 + 111+ 381+ 21)/7 = 259
The differences (in absolute value - we're going to square later so it doesn't matter) between each piece of data and the mean are
181, 169, 197, 417, 148, 122, 238
Square each of these and add the results together to obtain 367452
Now your question depends on whether you want the sample standard deviation or population standard deviation - which you have not specified. In the first case divide by 6. In the second case divide by 7. We get roughly 61242 or 52493. The square root of each yields 247.47 or 229.11 depending on whether you want the sample sd or pop sd. The 4 choices imply you are looking for the latter, so the answer is A.i think</span>
Answer:
Q#9: A 27/2
Q#10: A 9/2
Step-by-step explanation:
<u>Q#9:</u>
these triangles are similar so we have to take the ratios:
8/(12+8)=8/20
8/20=9/(9+x)
8*(9+x)=20*9
72 +8x=180
108=8x
x=27/2
<u>Q#10:</u>
6/10=x/(12-x)
6(12-x)=10x
72-6x=10x
72=16x
x=9/2
Answer:
I'm gonna go a little out of order.
To determine b, find where the line crosses the <em>y</em>-axis. If it's positive, put it as " + " and if it's negative, put it as " - ".
To determine m, find two points on the line that are directly on the number. Example, choose (4, 1) instead of (4.1, 5.2). Go up/down and left/right (while making sure to count) until you reach the second number. going up and right will be considered positive while down and left are considered negative.
Using rise/run, put your number for up/down as a numerator over your left/right, which will be a denominator.
Insert <em>m</em> and <em>b</em> and you're good to go!
