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Rus_ich [418]
3 years ago
7

Help a bab out with something, please?

Mathematics
2 answers:
Nuetrik [128]3 years ago
8 0

Answer:

18

Step-by-step explanation:

tino4ka555 [31]3 years ago
4 0

Answer:

18

Step-by-step explanation:

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Marcie ran the 400-meter race 3 times. her fastest time was 51.3 seconds. Her slowest time was 56.4 seconds. If Marcie's average
Nata [24]

Answer:

<em>52.5 Seconds</em>

<em></em>

Step-by-step explanation:

Let's call, her time for the third race, x.

To find the average (53.4), we add up all the values and then divide this total by the number of values.

So, we will set up our equation.

      56.4 + 51.3 + x

>    ------------------------ = 53.4

                3

To get rid of 3, we will multiply both sides by 3.

>   56.4 + 51.3 + x = 160.2

>   107.7 + x = 160.2

We will subtract 107.7 from both sides to isolate x.

<h2>> x = 52.5</h2><h2></h2><h3><em>I hope it will be understood.</em></h3><h3><em>If I have any inaccuracies please let me know.</em></h3><h3><em>Have a nice day and never stop questioning!</em></h3>
6 0
3 years ago
Z = ma for a please help
il63 [147K]

Answer:

Z = Ma = ba

You made a typo. One of those = signs should either  

be a + and a -.  Here are all possibilities:

1.     Z+Ma = ba, solve for a

     Ma-Ba = -Z

    a(M-B) = -Z

         a = -Z/(M-B)

2.        Z = Ma+ba, solve for a

     Ma+ba = Z

    a(M+b) = Z

         a = Z/(M+b)  

3.     Z-Ma = ba, solve for a

         Z = Ma+ba

     Ma+ba = Z

    a(M+b) = Z

         a = Z/(M+b)

4.       Z = Ma-ba, solve for a

     Ma-ba = Z

    a(M-b) = Z

         a = Z/(M-b)

Step-by-step explanation:

3 0
2 years ago
15 Points!
Virty [35]
5; -3; -1 -2i
<span>In polynomials we have not of an imaginary unit (i), therefore we have the fourth zeros -1-2i.</span>

f(x)=(x-5)(x+3)\left[x-(-1-2i)\right]\left[x-(-1+2i)\right]\\\\=(x^2+3x-5x-15)[x^2-x(-1+2i)-x(-1-2i)+(-1)^2-(2i)^2]\\\\=(x^2-2x-15)(x^2+x-2i+x+2i+1+4)\\\\=(x^2-2x-15)(x^2+2x+5)\\\\=x^4+2x^3+5x^2-2x^3-4x^2-10x-15x^2-30x-75\\\\=x^4-14x^2-40x-75

Answer: B)


6 0
3 years ago
Math problem please help me<br>​
valkas [14]

Answer:

Step-by-step explanation:

7 0
3 years ago
Check
sergejj [24]

Answer:

assalam o aalaikum

Step-by-step explanation:

I finished my homework this morning. __________________,

5 0
2 years ago
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