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astraxan [27]
3 years ago
13

Me ajuda ai ....10x-1=2x^2+7

Mathematics
1 answer:
garik1379 [7]3 years ago
3 0

Answer:

x = 1 and/or x = 4

Step-by-step explanation:

You can solve by factoring, using the quadratic formula, or completing the square.

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7 times a number is 3 thousand 5 hundered what is the number
babymother [125]
The number is 500. 500×7=3,500.
6 0
3 years ago
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3x=36x<br> What equals x
nirvana33 [79]

Answer:

12

Step-by-step explanation:

36 divided but 3 is 12 so x=12

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3 years ago
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Suppose a spherical balloon grows in such a way that after t seconds, its volume is V = 4 sqrt(t) cm3. What is the volume of the
Arisa [49]
:<span>  </span><span>You need to know the derivative of the sqrt function. Remember that sqrt(x) = x^(1/2), and that (d x^a)/(dx) = a x^(a-1). So (d sqrt(x))/(dx) = (d x^(1/2))/(dx) = (1/2) x^((1/2)-1) = (1/2) x^(-1/2) = 1/(2 x^(1/2)) = 1/(2 sqrt(x)). 

There is a subtle shift in meaning in the use of t. If you say "after t seconds", t is a dimensionless quantity, such as 169. Also in the formula V = 4 sqrt(t) cm3, t is apparently dimensionless. But if you say "t = 169 seconds", t has dimension time, measured in the unit of seconds, and also expressing speed of change of V as (dV)/(dt) presupposes that t has dimension time. But you can't mix formulas in which t is dimensionless with formulas in which t is dimensioned. 

Below I treat t as being dimensionless. So where t is supposed to stand for time I write "t seconds" instead of just "t".

Then (dV)/(d(t seconds)) = (d 4 sqrt(t))/(dt) cm3/s = 4 (d sqrt(t))/(dt) cm3/s = 4 / (2 sqrt(t)) cm3/s = 2 / (sqrt(t)) cm3/s. 

Plugging in t = 169 gives 2/13 cm3/s.</span>
4 0
3 years ago
hen entering large numbers in the answer box, do not use commas. For example, enter 1276400‎ for the number 1,276,400. Do not en
Gelneren [198K]

Answer:

12500

Step-by-step explanation:

Sum is addition.Add the first number to the second one

 9260

<u>+</u><u>3240</u>

<u> 12500 </u>

<u />

<u />

3 0
3 years ago
Help me please help me thank you
Eddi Din [679]

Answer:

1. The sum of interior angles of a pentagon is 180 but here the sum of angles of this pentagon is 550 . So it is wrong.

2. Angle 145 is equal to the corresponding of angle y. So angle y is 145 degree.So according to opposite angle theorem, angle x is also 145 degree.

Sorry I do not know next question solutions.

6 0
3 years ago
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