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alekssr [168]
3 years ago
9

Please help me with this question:)!

Mathematics
1 answer:
Georgia [21]3 years ago
6 0

Answer:

i think so option b is the correct option.

Step-by-step explanation:

because 3+7=10 not 11.

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What is the axis of symmetry of the function f(x)=-(x+9)(x-21)
Firlakuza [10]
Carry out the mult.:  f(x) = -[x^2 - 21x + 9x - 189] 

Combine like terms:  f(x) = -[x^2 - 12x - 189]
Eliminate the brackets [   ]:      f(x) = -x^2 + 12x + 189
Identify coefficients a, b and c:   a= -1, b=12, c=189

The equation of the axis of symmetry is    x = -b/(2a), which here equals

x = -(12)/[2(-1)], or     x = 6

This is also the x-coordinate of the vertex.  Plug x=6 into the original equation to calculate the y-coordinate.
3 0
3 years ago
Solve this please math problem asap please
Gennadij [26K]

Answer:

87

Step-by-step explanation:

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4 0
3 years ago
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If you get a sneak peak at the salary list of your job and realize you are in the lowest bracket, which is the lowest 1%, what i
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Answer:

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Step-by-step explanation:

Let X the random variable that represent the salary, and for this case we can assume that the distribution for X is given by:

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And we want to find a value a, such that we satisfy this condition:

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P(X   (b)

We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.01 of the area on the left and 0.99 of the area on the right it's z=-2.33. On this case P(Z<-2.33)=0.01 and P(z>-2.33)=0.99

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-2.33

And if we solve for a we got

a=48000 -2.33*5500=35185

And for this case the answer would be 35185 the lowest 1% for the salary

7 0
3 years ago
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Lisa [10]

\frac{ - 8}{24}  =  \frac{ - 4}{12}  =  \frac{1}{ - 3}  =   - \frac{1}{3 }  \\

3 0
3 years ago
Read 2 more answers
Select the correct answer.<br> What is the solution to this equation <br><br> (1/4)x+1=32
olga_2 [115]

Answer:

YES

Step-by-step explanation:

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