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In-s [12.5K]
3 years ago
13

Evaluate. 10 • [2 + (24 – 8)] ÷ 4 * A. 85 B. 9 C. 42 D. 45

Mathematics
2 answers:
ludmilkaskok [199]3 years ago
7 0
\bf 10\cdot [2+(24-8)]\div 4\implies \stackrel{\mathbb{PEMDAS}}{10\cdot [2+(16)]\div 4}\implies 10\cdot [18]\div 4
\\\\\\
180\div 4\implies 45

recall, peMDas, Multiplication and Division, from left-to-right.
oksano4ka [1.4K]3 years ago
3 0
The answer is D)45. 
I hope it helped. :)

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I NEED HELP ASAP I DONT UNDERSTAND THIS!!
zheka24 [161]

Let the cost of the hair dryer equal x.

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1.4x = 42

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3 years ago
Help! Please show work. -2k+10=8(8k-7)
Burka [1]

Answer:

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3 years ago
What are the real and complex solutions of the polynomial equation? x^3-8=0. with imaginary numbers
seraphim [82]

Answer:

Solutions are 2,  -1 +  0.5 sqrt10 i  and -1 - 0.5 sqrt10 i

or 2,  -1 +  1.58 i  and -1 - 1.58i

(where the last 2 are equal to nearest hundredth).


Step-by-step explanation:

The real solution is x = 2:-

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x^3 = 8

x = cube root of 8 = 2

Note that a cubic equation must have  a total of 3 roots ( real and complex in this case).  We can find the 2 complex roots by using the following identity:-

a^3 - b^3 = (a - b)(a^2 + ab + b^2).

Here  a = x and b = 2 so we have

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To find the complex roots we solve x^2 + 2x + 4 = 0:-

Using the quadratic formula x = [-2 +/- sqrt(2^2 - 4*1*4)] / 2

= -1 +/- (sqrt( -10)) / 2

= -1 +  0.5 sqrt10 i  and -1 - 0.5 sqrt10 i

4 0
3 years ago
Read 2 more answers
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xxTIMURxx [149]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
How to find sides of gon with meaure of each angle exterior?
MrMuchimi
All exterior angles of n-gon always add up to 360°

To find the number of sides:

\text {Number of sides = }  \dfrac{360}{\text {size of one exterior angle}}
8 0
3 years ago
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