help pls!
choose the best answer
x^2-8x+16x=0

a) no real solutions

b) one distinct, real solutions

c) two distinct, real solutions

Answer:

6 ; 24 ; 5.4 ; 24.6

Step-by-step explanation:

Given that:

Number of samples from each high school = 30

Proportion of students from high school A = 20%

Proportion of students from high school B = 18%

Number of sample A ; n(A) = 30

Proportion of sample A ; p(A) = 0.20

Number of sample B ; n(B) = 30

Proportion of sample B ; p(B) = 0.18

1.)

n(A).p(A) = 30 * 0.20 = 6

2.)

n(A). (1 - p(A))

30 * (1 - 0.20)

30 * 0.8 = 24

3.)

n(B).p(B) = 30 * 0.18 = 5.4

4.)

n(B). (1 - p(B))

30 * (1 - 0.18)

30 * 0.82

= 24.6

Shape of sampling distribution is not approximately normal ;

Both nApA and nBpB are < 10

Answer:

$19.35

Step-by-step explanation:

it takes two answers to mark someone brainliest so mark him now

Answer:

B) 40

Step-by-step explanation:

2:10    2 out of 10

40:200      40 out of 200

Answer:

Step-by-step explanation:

Mai:

She subtracted 5x instead of distributing. This is incorrect, because since it is in ( ), it has to be multiplied by 3.

Correct: 3(5x + 9) = 15x + 27

12x + 3 = 15x + 27

Noah:

Added 15x instead of subtracting. This is incorrect, because to combine like terms on each side you would add a negative number and subtract a positive number.

Correct: 12x + 3 = 15x + 27

12x - 15x = 27 - 3

-3x = 24

x = 24 / -3

x = -8

Answer:

solution

by using pythagorus theorem

h^2 =p^2 +b^2

[tex]3 \sqrt{2} \\ [/tex]

sine E =p/h

=

[tex]3 \sqrt{2} \div 10[/tex]

Answer: 7

Step-by-step explanation:

4.25+6.75=11

11+7=18

18-11=7

Answer:

11m-4

Step-by-step explanation:

Add 4.25m and 6.75m= 11m

7+-11= -4

Answer:

x = 54

Step-by-step explanation:

These are corresponding angles assuming that both transversals are parallel. Since these angles are corresponding, they must be congruent which means that both measures are the same.

Now the basic algebra can be done to find x:

(x + 12)° = 66°

(x)° = (66 – 12)°

(x)° = (54)°

x = 54

Step-by-step explanation:

I can't understand your answer

Answer:

14.940306992% or 15%

Step-by-step explanation:

To solve for percent or price markdown, you first have to find the difference between the original selling price and the sale price.

$ 175.90 - $ 149.62 = $26.28

Then, find the percentage that $26.28 is of the original selling price. You are decreasing the original by this much to get to the sale price.

$26.28 / $175.90

= 0.14940306992

Finally, multiply by 100 and round up to reach a percentage.

15%

Answer: 50 minutes

Step-by-step explanation: a quarter to 5 is always 15 minutes from 5, 4:45. So 5:35-4:45 is 50.

Answer:

47.87

.................

=========================================================

Explanation:

Notice how EC = 5 doubles to BC = 5+5 = 10

So the larger quadrilateral (ABCD) has side lengths that are exactly twice as long compared to the smaller quadrilateral's sides. We can say the scale factor is 2.

This must mean that side FG = 4 doubles to 4*2 = 8, which is the length of side AD. So that's how we get y = 8.

-----------------------------------

Extra info:

Length of AD, y = 8

Two quadrilaterals are similar if their corresponding angles are equal and also their corresponding sides must be proportional.

Given,

EC = 5

FG = 4

BE = 5

AD = y

ABCD ~ FECG,

then ratio of the corresponding sides will be equal.

BC/AD = EC/FG

(BE + EC)/AD = EC/FG

(5 + 5)/y = 5/4

10/y = 5/4

5y = 40

y = 40/5

y = 8.

Hence, 8 is value of y that is length of AD.

Learn more about similar quadrilaterals here:

https://brainly.com/question/26991730

#SPJ5

Answer:

$7

Step-by-step explanation:

Answer:

i. Area(A)=L×B

24.5m×18

441m²

Answer:

Step-by-step explanation:

(cos³x)/(sin x)=cot x

(cos³ x)/(sin x)=(cos x)/sin x

sin x≠0

x≠0,π,2π

cos³x-cos x=0

cos x(cos²x-1)=0

either cos x=0,x=π/2 ,3π/2

or

cos²x-1=0

2 cos²x=2

1+cos 2x=2

cos 2x=1=cos2nπ,n=0,1,2

2x=2nπ

x=nπ

x=0,π,2π

But x≠0,π,2π

so x=π/2,3π/2

Answer:

x=-3, y=-4

Step-by-step explanation:

Answer:

Certificate of Deposit

Step-by-step explanation:

A product offered by banks and credit unions that provides an interest rate premium in exchange for the customer agreeing to leave a lump-sum deposit untouched for a predetermined period of time.

Answer:

A CD in the financial sense is short for certificate of deposit.

It will be B.

Hope this helps!

Answer:

A.

Step-by-step explanation:

The points are at 3,1 which 3/1=3, 6,2, which 6/2=3/1, and 9,3, which 9/3=3/1.

(hope this helps!)

Answer:

Step-by-step explanation:

A lot to answer here, so lets get straight into it.

2y + 8 for y = -2

We just need to substitute :

2(-2) + 8

-4 + 8

4

-5x + 6 for x = -8

Substitute :

-5(-8) + 6

40 + 6

46

3r - 2s + 12 for r = 10 and s = 4

Substitute :

3(10) - 2(4) + 12

30 - 8 + 12

22 + 12

34

6y - 4x - 9 for x = 6 and y = -3

Substitute :

6(-3) - 4(6) - 9

-18 - 24 - 9

-42 - 9

-51

A number t decreased by 13

t - 13

Six times a number y

6y

Three more than four times a number p

4p + 3

Two times a number v decreased by 7

2v - 7

Six times the sum of seven and a number x

6(7 + x)

-8b - 10b + 7

-18b + 7

13 + 7t - 9

13 - 9 + 7t

4 + 7t

-9n - 8m + 8 - 3n + 6m - 2

-9n - 3n = -12n

-8m + 6m = -2m

8 - 2 = 6

-2m - 12n + 6

-5x + 3y + 9x + 7

-5x + 9x = 4x

3y = 3y

7 = 7

4x + 3y = 7

-2y + 4x - 3y + 6x - 12 for x = 2 and y = -4

Substitute :

-2(-4) + 4(2) - 3(-4) + 6(2) - 12

8 + 8 + 12 + 12 - 12

16 + 12 + 12 - 12

28 + 12 - 12

40 - 12

28

Answer:

The speed of car is 45.3 miles per hour.

Answer:

n+5

Step-by-step explanation:

Answer:

n + 5 or 5 + n

Step-by-step explanation:

add 5 to n, tanya's current age, to find how old she'll be in 5 years.

since the variable n is not defined, the answer cannot be simplified further than n + 5.

if n had been defined, you would be able to figure out her exact age after 5 years, which would be the fully simplified answer. for example, if n were to equal 10, then tanya would currently be 10 years old. by plugging in 10 for n in n + 5, you would figure out that in 5 years (aka 10 + 5) tanya would be 15.

i hope this helped! have a great day <3

Answer:

y = x - 1

Step-by-step explanation:

The formula for slope-intercept form is:

y = mx + b

m = slope

b = y-intercept

Slope is equal to rise over run...Let's take points (1,0) and (2,1) for example, see how if you add 1 to (1,0) it turns to (2,1)? This means the slope is 1.

The y-intercept is where x is equal to 0. Look at point (0,-1). X is zero here, and y is -1. This means that the y-intercept is -1.

The final equation would then be:

y = x - 1

(You typically don't write the 1 in front of the x if 1 is the slope)

Hope this helps!!

- Kay :)

Answer: The angle of elevation of the sun [tex]=64.40^{\circ}[/tex]

Step-by-step explanation:

According to the trigonometry,

In a right triangle,

[tex]tan A=\dfrac{Perpendicular}{Base}[/tex]

Let angle of elevation of the sun = x

From the given figure, Perpendicular = 286 feet

Base = 137 feet

[tex]\tan x =\dfrac{286}{137}\\\\ \tan x = 2.0876\\\\ x=\tan^{-1}(2.0876)\\\\ x=64.40^{\circ}[/tex]

The angle of elevation of the sun [tex]=64.40^{\circ}[/tex]

Answer:

The y-intercept of the function and the vertex of the function would change. (III and IV) This answer doesn't seem to be in the answer list (but there is proof for the answers below), though.

Step-by-step explanation:

(Notice that [tex]2f(x-4) = 2(x-4)^2.[/tex])

The domain of the function won't change because quadratics can all take all numbers as their input (which, by definition, is the domain of a function).

The range of the function won't change either, because we have just moved the function with 4 to the right (by substituting [tex]x[/tex] with [tex]x-4[/tex]) and multiplied the graph with respect to the y-axis by 2. The range will stay as all non-negative real numbers.

The y-intercept of the function will change, because for [tex]f(x)=x^2[/tex] it is [tex]y=0[/tex], while for [tex]y=2(x-4)^2[/tex] substituting [tex]x=0[/tex] doesn't give [tex]y=0[/tex]. (Instead, it gives [tex]y=32[/tex].)

The vertex of the function will change, because we have moved the function with 4 to the right and multiplied the graph with respect to the y-axis by 2: the vertex will have at the very least moved to the right.

Answer:

3:2

Step-by-step explanation:

Hi there!

6:4 = 3:2

6*2=3

4*2=2

3:2

======================================

Work Shown:

c = price of coat before discount

0.33c = discount = amount you save

c - 0.33c = original price minus discount = final price

c - 0.33c = 1c - 0.33c = (1-0.33)c = 0.67c = final price

In short, c - 0.33c = 0.67c

They are two ways of expressing the same thing.

You can think of it like saying 100% - 33% = 67%

If you save 33%, then you still have to pay the remaining 67% of the original cost.

-------------

Example:

Let's say the coat is $100 before the discount

c = 100

0.33*c = 0.33*100 = 33 dollars is how much you save

c - 0.33c = 100 - 33 = 67 dollars is the final price

0.67c = 0.67*100 = 67 matches with the previous figure above