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>
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:
<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](https://tex.z-dn.net/?f=f%28x%29%3D%28x-5%29%28x%2B3%29%5Cleft%5Bx-%28-1-2i%29%5Cright%5D%5Cleft%5Bx-%28-1%2B2i%29%5Cright%5D%5C%5C%5C%5C%3D%28x%5E2%2B3x-5x-15%29%5Bx%5E2-x%28-1%2B2i%29-x%28-1-2i%29%2B%28-1%29%5E2-%282i%29%5E2%5D%5C%5C%5C%5C%3D%28x%5E2-2x-15%29%28x%5E2%2Bx-2i%2Bx%2B2i%2B1%2B4%29%5C%5C%5C%5C%3D%28x%5E2-2x-15%29%28x%5E2%2B2x%2B5%29%5C%5C%5C%5C%3Dx%5E4%2B2x%5E3%2B5x%5E2-2x%5E3-4x%5E2-10x-15x%5E2-30x-75%5C%5C%5C%5C%3Dx%5E4-14x%5E2-40x-75)
Answer:
B)
Answer:
Step-by-step explanation:
Answer:
assalam o aalaikum
Step-by-step explanation:
I finished my homework this morning. __________________,
