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n200080 [17]
3 years ago
11

What is a way to find what 7 is what percent of 20 and I can't use a percent bar model?

Mathematics
1 answer:
Viefleur [7K]3 years ago
6 0

Answer:

you can cross multiply or u can 7/20 to get the answer that 7 is 35% of 20

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(secx)dy/dx=e^(y+sinx), please help me solve the differential equation. Thanks :)
nalin [4]
First, you must know these formula  d(e^f(x) = f'(x)e^x dx, e^a+b=e^a.e^b, and d(sinx) = cosxdx, secx = 1/ cosx

(secx)dy/dx=e^(y+sinx), implies  <span>dy/dx=cosx .e^(y+sinx), and then 
</span>dy=cosx .e^(y+sinx).dx, integdy=integ(cosx .e^(y+sinx).dx, equivalent of 
integdy=integ(cosx .e^y.e^sinx)dx, integdy=e^y.integ.(cosx e^sinx)dx, but we know that   d(e^sinx) =cosx e^sinx dx,
so integ.d(e^sinx) =integ.cosx e^sinx dx,
and e^sinx + C=integ.cosx e^sinxdx
 finally, integdy=e^y.integ.(cosx e^sinx)dx=e^2. (e^sinx) +C
the answer is 
y = e^2. (e^sinx) +C, you can check this answer to calculate dy/dx
7 0
3 years ago
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A jug holds 1 1/4 liters of water. Ben pours 3/5of a liter into a glass. How many liters of water are still in the jug?
Fofino [41]

Answer:

As Soon as Ben poured some of the water out of the jug there is going to be a subtraction so i subtracted 3/5from11/4

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23 of all your books are fiction. 16 of those are historical fiction. What fraction of all your books are historical fiction?
Svetllana [295]
Sixteen out of twenty three

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Help me I need please<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%7Bx%7D%5E%7B2%7D%20-%204%20%7D%20%5Ctimes%20%20%5Csq
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Step-by-step explanation:

SEE THE IMAGE FOR SOLUTION ..

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2 years ago
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1. Naty bought a dress for $24.95 and a skirt for $14.95. The sales clerk said the total
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Answer:

Answer:

39.995=40.00

   

Step-by-step explanation:

0.095 is tax he just added 9.5 he is not correct

7 0
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