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svetoff [14.1K]
3 years ago
9

I need help on this please

Mathematics
1 answer:
Mazyrski [523]3 years ago
7 0
Answer: B, 2.4 Units
Explanation: Since the two triangles are similar, the lengths of the triangles are equal in ratio. This equates to:
AB/DE = AC/DF
since the value of AB/DE IS 5/3, the ratio between AC and DF are the same.
Substitute the ratio with the values of AC and DF, and you will get the value of DF.
If you don't understand feel free to look at my workings

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Select the best answer. About how much will a $459.95 LCD TV cost including the sales tax of 8.25%?
erma4kov [3.2K]
I used the Old Change New method and I crossed multiplied.
The answer is about $498 (I rounded $497.895875)
Check: $498>459.95 by 8.25%

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Mrs. Perez was looking at her bank account statement. She noticed that her beginning balance was $500 and she added nothing to h
Irina18 [472]
The answer would be d. Because the identity property of addition is that if you add zero to any number the number stays the same
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4 years ago
At hogan airport an airplane off 12 minutes how many airplane take off in 5 hours
dusya [7]
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3 years ago
Without calculating, is the equation (1.8 times 3) times 2.1 = ( 1.8 times 2.1 ) true or false? Explain your reasoning.
Paladinen [302]
It is true due to the commutative property of multiplication. If all of your operations are multiplication, then the integers can move around and you can still get the same answer. 
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If you meant what you typed, then the equation is false. The left side would be 3 times the value of the right side due to the 3 being on the left side and not the right side while without the 3 the two sides would be equal.
6 0
3 years ago
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alexandr1967 [171]
X is the radius of the slice.  So we must find the equation of the side of the cone.

y=mx+b, so now we must use two points to solve for the slope, or "m".

m=(y2-y1)/(x2-x1)

m=(0-15)/(5-0)

m=-15/5

m=-3  so our line so far is:

y=-3x+b, b=y-intercept=value of y when x=0, which we can see is 15 ft so:

y=-3x+15

Now the radius is x, so we must solve for x from the equation above...

-3x+15=y  subtract 15 from both sides

-3x=y-15  divide both sides by -3

x=(15-y)/3

And area of this circle is:

A=πx^2, and using x found above:

A=(π/9)(15-y)^2

A=(π/9)(225-30y+y^2), so when y=6 ft

A=(π/9)(225-30*6+6^2)

A=(π/9)(81)

A=9π or if we let π=pi

A=9pi ft^2
8 0
3 years ago
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