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3 years ago

How do you write 390% as a fraction or mixed number in simplest form?

Mathematics

2 answers:

vladimir2022 [97]3 years ago

7 0

390% converts to a decimal by moving the decimal point 2 spaces up.

390% = 3.9

To convert decimal to a fraction- the whole number is over 1 and the tenths are over 10. (hundredths over 100, and it goes on)

Mixed fraction answer = 3 9/10

Improper fraction = 39/10

Solnce55 [7]3 years ago

4 0

Improper fraction = 39/10

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I don't have a question but x + 8900 = 390<br>

AleksandrR [38]

Answer:

you did it wrong you have to subtract X from 8900.

First you want to subtract 390 from 8900 and that equals

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2 years ago

How many times larger is 1.9 × 10^-8 is than 4.2 × 10^-13<br><br>please help

Jet001 [13]

Answer:

hope this helps!

Step-by-step explanation:

You have to divide:

1.9x10^-8 ÷ (4.2x10^-13)

= appr .45 x 10^5

= .45 x 100000

= appr 45,000 times as large

source: https://www.jiskha.com/questions/1857280/estimate-how-many-times-larger-1-9x10-8-is-than-4-2x10-13

credit: mathhelper

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3 years ago

A train must climb a constant gradient of 5.5m for every 200m on track. Find the angle of incline

Eduardwww [97]

<span>angle = arcsin(5.5/200) = 1.575 degrees</span>

4 0

3 years ago

Read 2 more answers

You have 2 5/8 pizzas to share with three friends, how much pizza will each friend get?

Mazyrski [523]

2 5/8 divided by 3

(2*8)+5/8 divided by 3

16+5/8 divided by 3

(3*7/2^3)(1/3)

3*7/2^3*3

7/2^3

7/8

each friend would get 7/8

5 0

3 years ago

Read 2 more answers

One of our brainliest, Konrad509, made this:

Reil [10]

$\dfrac{B_x \sqrt{74_x}}{1D_x}+J_x51_x=4G3_x$

A=10, B=11, C=12, etc.

$\dfrac{11\cdot x^0\cdot \sqrt{7\cdot x^1+4\cdot x^0}}{1\cdot x^1+13\cdot x^0}+19\cdot x^0\cdot (5\cdot x^1+1\cdot x^0)=4\cdot x^2+16\cdot x^1+3\cdot x^0\\\\\dfrac{11\sqrt{7x+4}}{x+13}+19(5x+1)=4x^2+16x+3\\\\\dfrac{11\sqrt{7x+4}}{x+13}+95x+19=4x^2+16x+3\\\\11\sqrt{7x+4}+95x(x+13)+19(x+13)=(4x^2+16x+3)(x+13)\\\\11\sqrt{7x+4}+95x^2+1235x+19x+247=4x^3+52x^2+16x^2+208x+3x+39\\\\11\sqrt{7x+4}=4x^3-27x^2-1043x-208\\\\121(7x+4)=(4x^3-27x^2-1043x-208)^2$

$121(7x+4)=(4x^3-27x^2-1043x-208)^2\\\\847x+484=16 x^6 - 216 x^5 - 7615 x^4 + 54658 x^3 + 1099081 x^2 + 433888 x + 43264\\\\16 x^6 - 216 x^5 - 7615 x^4 + 54658 x^3 + 1099081 x^2 + 433041 x +42780=0$

Now, the "only" thing that remains to do is solving the above equation.

While making this problem I only made sure it has a solution. I didn't try to solve it myself and I didn't know it will end up with such "convoluted" polynomial. Sorry to everyone who tried to solve it... m(_ _)m

I think the best way to approach it is using the rational root theorem since we know that $x\in\mathbb{N}$ . Moreover we can deduce that $x\geq19$ since there is $J$ and $J=19$ .

After you succesfully solve it, you should get the answer $x=20$ .

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4 years ago