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3 years ago

How to write a quadratic function in vertex form and identify the vertex?

1 answer:

8 0

Suppose a quadratic function like
$f(x) = a {x}^{2} + bx + c$
the vertex will be
$x = \frac{ - b}{2a} \\ y = \frac{4ac - {b}^{2} }{4a}$

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Which ratio is proportional to 18/28 ? <br> Help me plzzzz i will give brainliest

maks197457 [2]

Answer:

18/21 = 30/35

Step-by-step explanation:

so the problem says 18/21 so if that's the correct ratio to proportion to the answer would be. 30/35. the reason is that you can divide 18 and 21 by 3 to get 6/7 then if you multiply by 5 you get 30/35. Dividing and multiplying both the denominator and numerator keeps the ratio proportional.

3 0

3 years ago

For what value of x is quadrilateral CDEF a parallelogram?<br><br>x=?

Contact [7]

Answer:

x = 5

Step-by-step explanation:

Since we know that the diagonals bisect each other and divide into equal parts so ➡

x - 2 = 2x -7

2x - x = 7 - 2

x = 5

8 0

3 years ago

An electric sale gives a reading equal to the true weight plus a random error that isnormally distributed with mean 0 and standa

Pepsi [2]

Answer:

a) 95% confidence interval estimate of the true weight is (3.026, 3.274)

b) 99% confidence interval estimate of the true weight is (2.944, 3.356)

Step-by-step explanation:

Confidence Interval can be calculated using M±ME where

M is the mean of five successive weightings (3.150)

ME is the margin of error from the mean

And margin of error (ME) can be calculated using the formula

ME= $\frac{t*s}{\sqrt{N} }$ where

t is the corresponding statistic in the given confidence level and degrees of freedom(t-score)

s is the standard deviation of the random error (0.1)

N is the sample size (5)

Using the numbers 95% confidence interval estimate of the true weight is:

3.150± $\frac{2.776*0.1}{\sqrt{5} }$ ≈3.150±0.124

And 99% confidence interval estimate of the true weight is:

3.150± $\frac{4.604*0.1}{\sqrt{5} }$ ≈3.150±0.206

3 0

3 years ago

What is the cube root of 57 R cubed

Studentka2010 [4]

Approximately 3.849 is the cube root of 57 cube root.

8 0

3 years ago

B)the LCM of three numbers is 24 and their G.C.D is 4. If two<br>find the other number

kicyunya [14]

Step-by-step explanation:

because 6*4=24, so the G.C.D is 4 and the other number is 6

4 0

3 years ago