a used bookstore also started selling used CDs and videos. In the first week the store sold a combination of 40 CDs and videos. They charged $4 CD and $6 per video and the total sales were $180. Determine the total number of CDs and videos sold
Answers
CDs and
videos were sold.
Let denote number of CDs and videos respectively.
Total number of CDs and videos sold
Amount charged per CD
Amount charged per video
Also,
Total sales
Divide both sides by
So,
Hence, CDs and
videos were sold.
For more information:
c+v=40
4c+6v=180
We can solve this system of equations using substitution
c+v=40
-v -v
_________
c=40-v
4(40-v)+6v=180
160-4x+6v=180
-160 -160
________________
2v=20
v=10
c+v=40
c+10=40
-10 -10
________
c=30
So, there are 30 CDs and 10 videos.
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You are asked to draw a triangle using three of the following angles: 0°, 30°, 45°, 55°, 60°, 80°, 90°, 105°. Which triangle cannot exist?A) 30°, 60°, 90° B) 45°, 55°, 80° C) 30°, 45°, 105° D) 30°, 45°, 55°
Beverages inc. sells espresso for 8.50 per pound and roasted coffee for 10.25 per pound. the following equations represent a recent online purchase. x+y=5 and 8.5x+ 10.25y=46. which of the following is true? A. the variable x represents represents the pounds of roasted coffee in the 46$ purchase.B. the variable y represents the pounds of roasted coffee in the 46$ purchaseC. the consumer spent 46$ and purchase 5 pounds of espresso D. the consumer spent 46$ and purchase 5 pounds of roasted coffee
Is 27/51 equal to 18/34
MLB=104°
AC= 20cm
mLC=
AB =
CB -
Answers
Answer:
∠C = 37° ,
AB = 26.54 cm ,
BC= 33.27 cm
Step-by-step explanation:
Given that in triangle ABC
∠A = 39° AC = 20 cm
∠B = 104°
∵ sum of all the three angles of triangle = 180°
So, ∠C = 180° - ( ∠A + ∠B)
∠C = 180° - (39° + 104°)
∠C = 37°
Now Tan 37° =
Or, AB =
So, AB = 26.54 cm
Again, Sin 37° =
So, BC =
Or, BC =
∴ BC= 33.27 cm
Hence ∠C = 37° , AB = 26.54 cm , BC= 33.27 cm Answer
Answers
If you factored out 12 you could say 3x4. Now 3 is a prime number so it cant be broken down any more. You can break down 4 into 2x2. 2 is a prime number so cant be broken down any further. When 12 is factored out it is 2x2x3
6.25%
B.
58%
C.
62.5%
D.
0.625%
Answers
if you divide 5 by 8, you will get .625, so the answer is 62.5%
Answers
There are 3 local maxima and minima. These are the points that are the highest and lowest points respectively within a given region of the graph. In other words, they are the hill and valley points. In general, a shorthand way of saying "maxima and minima" is to simply say "extrema"
There are 2 inflection points. This is because there is a concave up region followed by a concave down region, then after that is a concave up region. Each change from concave down to up, or vice versa, introduces an inflection point in between.
There are 4 branches to this curve, so the degree is most likely 4. Even degree functions have both endpoints aimed in the same direction.
b {(0, 0), (1, 2), (2, 6), (2, 8)}
c {(0, 0), (0, 2), (2, 0), (2, 4)}
d {(0, 2), (1, 4), (2, 6), (3, 6)}
Answers
Answer:
It is D. because no numbers repeat on the x-value which makes it okay.
Correct me if I am wrong
Answers
This is because 5 and 5/10 is the same as 5 and 1/2
5 and 1/5 in decimal form is 5.50
Then we will add 0.02
That will make the answer 5.52