I don't understand this at all.

9514 1404 393

Answer:

  y = -x^2 +3x -4

Step-by-step explanation:

We are given two points with the same y-value, so we know the axis of symmetry lies halfway between their x-coordinates, at ...

  x = (1 +2)/2 = 3/2

Then the vertex form of the equation can be written ...

  y = a(x -3/2)^2 +k

__

We can use two of the points to find the values of 'a' and 'k'.

For (x, y) = (1, -2)

 -2 = a(1 -3/2)^2 +k = a/4 +k

For (x, y) = (3, -4)

  -4 = a(3 -3/2)^2 +k = 9a/4 +k

Subtracting the first of these equations from the second, we have ...

  (9a/4 +k) -(a/4 +k) = (-4) -(-2)

  2a = -2

  a = -1

Then k can be found from the first equation.

  -2 = -1/4 +k

  k = -1  3/4

So, the vertex form equation is ...

  y = -(x -3/2)^2 -7/4

__

Expanding this, we can find the standard form.

  y = -(x^2 -3x +9/4) -7/4)

  y = -x^2 +3x -4

Answer:

the answer is irrational

The answer fam is......... A) p^3−9q^3−12pq+9p^2q−12p+10q−18

B) 12x^3−3x^2y−3xy^2+4y^3−4xy−8x+14y−7

Answer:

[tex]\boxed{\bold{\sf{ a. ~p^{3} - 9q^{3} + 9p^{2}q - 12pq + 10q - 12p - 18 }}}[/tex]

[tex]\bold{\boxed{\sf{b.~12x^{3} + 4y^{3}-3x^{2} y - 3xy^{2} - 4xy - 8x + 14y - 7 }}}[/tex]

Step by step explanation

See attached picture.

For the addition and subtraction of algebraic expressions,like terms are added or subtracted as per the signs given and unlike terms are kept as they are. The sum or difference of like terms give another like term in which it's coefficient is sum or difference of their coefficient.Remember the following facts of addition and subtraction :

Like terms can be added or subtracted. Only coefficients of like terms can be added or subtracted. In horizontal method , expressions are arranged in same row and put sign for addition or sign for subtraction and remove the bracket and then simplify.

Hope I helped!

Best regards!

~TheAnimeGirl

Answer:

i figured out how to attach lol

Step-by-step explanation:

Answer:

175.79* .0825 = 14.50 + 175.79 =  190.29 $190.25

Step-by-step explanation:

The amount of sales tax Samuel will pay is $14.50

Given the following information

Get the amount of sales tax:

Amount of sales tax = 8.25% of $175.79

Amount of sales tax = 0.0825 * 175.79

Amount of sales tax = $14.50

Hence the amount of sales tax Samuel will pay is $14.50

Learn more on sales tax here: https://brainly.com/question/9437038

Answer:

1cm: 20km

Step-by-step explanation:

= x/4 + 5 = 8

= x/4 = 8 - 5 ( transposing +5 from LHS to RHS changes +5 to -5 )

= x/4 = 3

= x = 3 × 4 ( transposing ÷4 from LHS to RHS changes ÷4 to ×4 l

= x = 12

Let us see whether the value of x is correct or not by placing 12 in the place of x .

= 12 ÷ 4 + 5 = 8

= 3 + 5 = 8

= 8 = 8

= LHS = RHS

Which means the value of x we found out is correct .

Step-by-step explanation:

[tex] \frac{x}{4} + 5 = 8 \\ x + 5 = 32 \ \\ x = 32 - 5 \\ x27[/tex]

Answer:

y = 1

y = 16

y = 20

y = 0

Step-by-step explanation:

Por cada valor de x intercambialo con su valor nuevo.

Answer:

24

Step-by-step explanation:

edge 2021

tep-by-step solution Step 1 of 4 The objective is to find the least amount of wrapping paper you need. Chapter 11, Problem 65RE is solved. View this answer View a sample solution Step 2 of 4 Step 3 of 4 Step 4 of 4 Back to top Corresponding textbook Mathematical Practices, Mathematics for Teachers | 1st Edition

Answer:

purple

Step-by-step explanation:

because the color green and blue suck

Answer:

Red sus. Vote him bois.

Step-by-step explanation:

lol (Brainliest)

Answer:

16/20

Step-by-step explanation:

Answer:

The side that is not labeled will be 27 mm

Step-by-step explanation:

The angles are the same bordering the top side

meaning that the sides are also the same

my explanation is bad

Brainly crown?

Answer:

it whold be 25

Step-by-step explanation:

it could not be 22 that whold be to small

Answer:

b

Step-by-step explanation:

BCCCCCC

Answer:

Q1 1000     1

    3500    3.5

   500       .5

   75   .075

   1        .001

   x       1/1000x or .001x        Q2    Y=  1/1000x

Step-by-step explanation:

just search up 1000 meters to 1 kilometer and go from there :)  

Answer:

8 inches

Step-by-step explanation:

If a plant grows 6 inches in 3/4 month, it will grow 8 inches in a month because it will grow 2 inches in 1/4 month, and 2x4=8. There's your answer! Hope it helps!

Answer:

-60.8-(-3.1)= -57.7

Explain:

(-9.5)6.4 = -60.8

(-9.5) + 6.4 = -3.1

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

Yes the researcher can  conclude that the supplement has a significant effect on cognitive skill

b

[tex]d =  0.5778 [/tex]

c

The result of this hypothesis test shows that there is sufficient evidence to  that the supplement had significant effect.The measure of effect size is  large due to the large value of Cohen's d (0.5778 > 0.30 )

Step-by-step explanation:

From the question we are told that

  The sample size is  n=16

    The sample mean is  [tex]M  =  50.2[/tex]

    The standard deviation is [tex]\sigma  = 9[/tex]

    The  population mean is  [tex]\mu =  45[/tex]

     The level of significance is  [tex]\alpha =  0.05[/tex]

The null hypothesis is [tex]H_o  \mu =45[/tex]

The alternative hypothesis is [tex]H_a  \mu \ne 45[/tex]

Generally the test statistics is mathematically represented as

          [tex]z =  \frac{M -  \mu}{\frac{\sigma}{\sqrt{n} } }[/tex]

=>       [tex]z =  \frac{50.2 - 45}{\frac{9}{\sqrt{16} } }[/tex]

=>       [tex]z =  2.31 [/tex]

Generally the p-value is mathematically represented as

     [tex]p-value  =  2 *  P(Z >  z )[/tex]

      [tex]p-value  =  2 *  P(Z >  2.31 )[/tex]

From the z-table  

      [tex]P(Z >  2.31 ) = 0.010444[/tex]

=>     [tex]p-value  =  2 *  0.010444 [/tex]

=>     [tex]p-value  =  0.021 [/tex]

From the obtained values we see that [tex]p-value <  0.05[/tex]

 Decision Rule

 Reject the null hypothesis

Conclusion

There is sufficient evidence to conclude that the supplement has a significant effect on the cognitive skill of elderly adults

Generally the Cohen's d for this study is mathematically represented as

    [tex]d =  \frac{M  -  \mu}{\sigma }[/tex]

=>  [tex]d =  \frac{50.2 -45}{9 }[/tex]

=>  [tex]d =  0.5778 [/tex]

Answer:

Gail will have 8 cards before adding those 10, 18 if she added those 10.

Step-by-step explanation:

When Gail has 8 cards then Helen would have 18 cards, whicj is twice more than double that of Gail's.

Answer:over 10

Step-by-step explanation:

Get sticke bugged lol

Answer: 7.36

Step-by-step explanation:

avg = (6.72 + 8.40 + 8.40)/3 = 23.52/3 = 7.36

The answer is probs  2 because i estimated it and it looks like it would

Answer:

A goes with C

B goes with D

C goes with A

D goes with B

Step-by-step explanation:

Answer:

3x - 6y = -21

Step-by-step explanation:

The Y and X must stay the same for the same slope while the constant will change depending on the y-intercept.

Answer:

Step-by-step explanation:

Answer:56.077

Step-by-step explanation:

Answer:

37 degrees

Step-by-step explanation:

108 = x + 71

37 = x

Answer:

x = 3.2

Step-by-step explanation:

Aquí, queremos encontrar el valor de x en la imagen de arriba.

Matemáticamente eso sería;

x / 4 = (x + 16) / (20 + 4)

x / 4 = (x + 16) / 24

Cruz multiplicar 24 * x = 4 (x + 16)

24x = 4x + 64

24x - 4x = 64

20x = 64

x = 64/20 x = 3,2

From the transversal proportionality theorem of parallel lines r,s,t. the value of x is 3.2.

It is given that r, s, t are parallel to each other. The length of the sides is given as 16, 20, 4, x. we need to find the value of x.

If two or more parallel lines are cut by two transversals, then they divide the transversals proportionally.

From the transversal proportionality theorem,

When r, s, t are parallel to each other then a / x = b / y

so,

[tex]\rm \frac{16}{x} = \frac{20}{4} \\\rm x = \frac{16}{5} \\\rm x = 3.2[/tex]

Therefore, from the transversal proportionality theorem of parallel lines r,s,t. the value of x is 3.2.

Learn more about the transversal proportionality theorem here:

https://brainly.com/question/4087830