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3 years ago

Convert 8.5 hours into second

Mathematics

2 answers:

jeka57 [31]3 years ago

8 0

Answer: 30,600 seconds

balandron [24]3 years ago

4 0

Answer:

30600 seconds

Step-by-step explanation:

We know that,

1 hour = 3600 seconds,

to find for 8.5 hours, we simply just multiply it by 8.5,

3600 * 8.5 = 30600 (After you do the calculations)

If I am wrong please tell me,

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What are the solutions of x^2-2x+5=0

sweet [91]

The solution of $x^{2}-2 x+5=0$ are 1 + 2i and 1 – 2i

Solution:

Given, equation is $x^{2}-2 x+5=0$

We have to find the roots of the given quadratic equation

Now, let us use the quadratic formula

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ --- (1)

Let us determine the nature of roots:

Here in $x^{2}-2 x+5=0$ a = 1 ; b = -2 ; c = 5

$b^2 - 4ac = 2^2 - 4(1)(5) = 4 - 20 = -16$

Since $b^2 - 4ac < 0$ , the roots obtained will be complex conjugates.

Now plug in values in eqn 1, we get,

$x=\frac{-(-2) \pm \sqrt{(-2)^{2}-4 \times 1 \times 5}}{2 \times 1}$

On solving we get,

$x=\frac{2 \pm \sqrt{4-20}}{2}$

$x=\frac{2 \pm \sqrt{-16}}{2}$

$x=\frac{2 \pm \sqrt{16} \times \sqrt{-1}}{2}$

we know that square root of -1 is "i" which is a complex number

$\begin{array}{l}{\mathrm{x}=\frac{2 \pm 4 i}{2}} \\\\ {\mathrm{x}=1 \pm 2 i}\end{array}$

Hence, the roots of the given quadratic equation are 1 + 2i and 1 – 2i

6 0

3 years ago

Plz I need help with the last 2 and plz simplify then

GalinKa [24]

Answer:

c) (8^6) / 8 = 32768

d) (7^8) / (7^6) = 49

Step-by-step explanation:

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3 years ago

Find the lateral area and total area of a regular pyramid with a square base. The bae is 10m and the slant edge or height is 13m

kogti [31]

the lateral area and total area of regular pyramid with a square base is 130

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3 years ago

Answer 10,11,12,13,14

QveST [7]

10
13.50 per set
+.45 per day value
she got 20 sets
5 days after would be
13.50 ×20=270
value of 20 sets at 13.50 a set on day one was 270.00
.45×20=9.00
the 20 sets gain 9 dollars a day
9×5=45
9 dollars a day times 5 days is 45 dollars
45+270=315

11

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3 years ago

There are 294 boys and 322 girls in the hill school. how many students are in the school.

lys-0071 [83]

I think it's 616 that what I got but I'm not sure

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3 years ago