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3 years ago

Using the quadratic form, which letter is key in finding the axis of symmetry?

Mathematics

2 answers:

Elenna [48]3 years ago

5 0

Answer:

Step-by-step explanation:

on edge2021

anzhelika [568]3 years ago

3 0

Answer:

y=ax²+bx+c

c is axis of symmetry I believe

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The following function is probability mass function. f left-parenthesis x right-parenthesis equals StartFraction 2x plus 1Over 2

lora16 [44]

Answer:

a) Mean = 2.6

B) Variance = 9.2

Step-by-step explanation:

We are given the following probability mass function in the question:

$F(x) = \dfrac{2x+1}{25}, x = 0,1,2,3,4$

a) Mean of random variable

$\mu = \displaystyle\sum x_iF(x_i)\\\\=0(\dfrac{1}{25}) + 1(\dfrac{2+1}{25}) + 2(\dfrac{4+1}{25}) + 3(\dfrac{6+1}{25}) + 4(\dfrac{8+1}{25})\\\\=\dfrac{3+10+21+36}{25} = \dfrac{70}{25} = 2.8$

b) Variance of the random variable

$\sigma^2 = \displaystyle\sum x_i^2F(x_i)\\\\=0^2(\dfrac{1}{25}) + 1^2(\dfrac{2+1}{25}) + 2^2(\dfrac{4+1}{25}) + 3^2(\dfrac{6+1}{25}) + 4^2(\dfrac{8+1}{25})\\\\=\dfrac{3+20+63+144}{25} = \dfrac{230}{25} = 9.2$

6 0

3 years ago

Given that the two triangles are similar, solve for x if AU = 20x + 108, UB = 273, BC = 703, UV = 444, AV = 372 and AC = 589.

skelet666 [1.2K]

Data:

<span>segment AU = 20x + 108,
segment UB = 273,
segment BC = 703,
segment UV = 444,
segment AV = 372 and
segment AC = 589.

From the figure:

1) Similarity => segment AB / segment BC = segment AU / segment UV

2) segment AB = segment AU + segment UB = 20x + 108 + 273 = 20x + 381

=> (20x + 381) / 703 = (20x + 108) / 444

=> 444 (20x + 381) = 703 (20x + 108)

=> 8880x + 169164 = 14060x + 75924

=> 14060x - 8880x = 169164 - 75924

=> 5180 x = 93240

=> x = 93240 / 5180

=> x = 18

Answer: x = 18
</span>

7 0

3 years ago

The students at Joey's school voted for a new school color. 90 students voted for red and the other 10 students voted for blue.

pickupchik [31]

90% of the student voted for red and only 10% voted for blue.

3 0

3 years ago

Jody gets paid $200.00 per week, plus $10.00 for every oil change she completes. Write the equation that shows the relationship

Serggg [28]

10x+200 ;
X being how many oil changes she does (the unknown)
The slope should be up 10/1

3 0

3 years ago

What's the circumference of a circle with a radius of 7 feet?

damaskus [11]

The circumference of the circle with 7 feet radius is 43.96 feet. This is computed using the formula in solving the circumference, 2 times Pi times radius. Substituting the values given, circumference is equal to 2 times Pi (3.14) times 7 feet, which give us the answer of 43.96 feet.

8 0

3 years ago