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jenyasd209 [6]
3 years ago
15

From 80 pencils to 152 pencils

Mathematics
1 answer:
polet [3.4K]3 years ago
3 0
You have to subtract 152 minus 80
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Which number in the monomial 215x18y3z21 needs to be changed to make it a perfect cube?
hoa [83]
We need to remember that:
                   xyz = (x)(y)(z)
if x, y and z are perfect cubes, then xyz would also be a perfect cube

Also, 
                 (x^n)^m = x^(mn)
if it is a perfect cube, then it can be factored into the expression (x^n)^3, wherein n is a whole number.

All should be a perfect cube, given

215x^18(y^3)(z^21)

By writing the terms separately, we would see which one is to be changed. 

215 = 5*43, we see this is not a perfect cube, we could changed it to 6^3 or 216

x^18=(x^6)^3

y^3=y^3
z^21=(z^7)^3

The other terms are perfect cubes except for the first one. So the correct answer would be the last option, 215 should be changed.
4 0
3 years ago
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PLS HELP!! :))<br><br> Find the volume......
OLEGan [10]

Answer:

19 + 14 + 10 = 43

Step-by-step explanation:

7 0
3 years ago
Given f(x) and g(x) = f(x) + k, use the graph to determine the value of k.
VladimirAG [237]

Answer:

The answer should be 3 :)

Step-by-step explanation:

Pick a point on f(x) and count up until you hit the g(x) point :)

When i did this, i got 3 :)

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8 0
3 years ago
The sales tax rate in a certain state is 8%. How much would you pay in total for a taxable item that costs $25.25?
faust18 [17]
25.25x 0.08= 2.02 so answer is 2.02
6 0
3 years ago
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20 years ago, father's age was 5 times his son's age. Now his age is 10 years more than twice his son's present age. Find their
Montano1993 [528]

Step-by-step explanation:

x = father's age now

y = son's age now

x = 2y + 10

x - 20 = 5(y - 20) = 5y - 100

using the first in the second equation :

2y + 10 - 20 = 5y - 100

-10 = 3y - 100

90 = 3y

y = 30

x = 2y + 10 = 2×30 + 10 = 60 + 10 = 70

the father is now 70 years old, the son now 30 years old.

6 0
2 years ago
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