Why is 7.8 an irrational number?

Step-by-step explanation:

start from f(g(x))

f(g(x))= 3(g(x)) -2

f(g(x))= 6x -2

h(f(g(x)))=(f(g(x)))² -5(f(g(x)))

h(f(g(x)))=(6x-2)² -5(6x-2)

h(f(g(x)))=36x²-24x+4-(30x-10)

h(f(g(x)))=36x²-24x+4-30x+10

h(f(g(x)))=36x²-54x+14

Answer:

Graph the parabola using its properties and the selected points. Direction: Opens Up Vertex: ( 4 , − 4 ) Focus: ( 4 , − 15 4 ) Axis of Symmetry: x = 4 Directrix: y = − 17 4 x y 2 0 3 − 3 4 − 4 5 − 3 6 0 image of graph

Hoped I helped

Step-by-step Explination + Answer:

Graphing

So the vertex is at (-4,-8)

In order to graph, we need the vertex and another point. That other point can be one of the zeros we found, like (-2,0)

Answer: The sales tax is $36.79  

Step-by-step explanation:

Multiply the sales tax percent by the money to find how much the sale tax is.

7% * 525.50 = 36.785  which rounds to 36.79  to the nearest penny.

The required amount of sales tax for the refrigerator is $36.785.

As mentioned in the question, a refrigerator is priced at $525.50. There is a 7% sales tax rate. The sales tax for the refrigerator in dollars and cents is to be determined.

The percentage is the ratio of the composition of matter to the overall composition of matter multiplied by 100.

Here,
The total price of the sales tax = $525.50
Sales tax is 7%,

sales tax= 525.50 × 7%
sales tax = $36.785

Thus, the required amount of sales tax for the refrigerator is $36.785.

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Answer:

4,414,000,000

Step-by-step explanation:

4.414x10^9, move the decimal place 9 places to the left.

Answer:

4,414,000,000

Step-by-step explanation:

4.414 x 10⁹

= 4.414 x 1,000,000,000

= 4,414,000,000

Step-by-step explanation:

The derivative of sin x with respect to x is cos x.

d/dx (sin x) = cos x

Answer:cos x

Step-by-step explanation:

Answer:

x= 24, <ABD = 55°

Step-by-step explanation:

The way I go to x=24 is in the picture, but to find <ABD is a piece of cake, just take its value (2x+7) and replace the x with 24 and then you will get 55°

Glad to help :)

The situation that is an example of an observational study is " Having customers fill out a questionnaire about their favourite brand of toothpaste".

When researchers monitor the effect of a risk factor, diagnostic test, therapy, or other intervention without attempting to influence who is or is not exposed to it in observational studies.

For example: Consider someone standing on a popular street in a New York neighbourhood asking passers-by how many dogs they have, then analyzing the data to see if more pet food businesses are needed in the area.

As we know that in an observational study, the sample whose test/survey is been taken is completely random.

Therefore, the situation that is an example of an observational study is " Having customers fill out a questionnaire about their favourite brand of toothpaste".

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Answer: C

Step-by-step explanation: Collecting the blood pressure readings of a group of elderlyindividuals in a small town

Answer:

1/56

Step-by-step explanation:

7

8

−

6

7

=

1

56

(Decimal: 0.017857)

Answer: 0.01785714285 is what it is in decimal form AND

1/56 in fraction form.

Step-by-step explanation:

So we are given 7/8 - 6/7.

WE have to find what it is:

0.01785714285 is what it is in decimal form AND

1/56

Answer:quit

Step-by-step explanation:

Answer:

5 yards

Step-by-step explanation:

Answer:

She needs to get 8 bags of spoon and 1 bag of fork

Step-by-step explanation:

Here in this question, we want to know the least number of spoons and the least number of bags to be bought so that there are same number of each.

Basically, to calculate this, we need the lowest common multiple of 16 and 2. The lowest common multiple of both is 16 (2 is a factor of 16)

So the lowest number of each she can buy to have the same number of pieces is 16.

Kindly recall that spoons come in bags of 2. So to achieve the 16, she needs 8 bags.

Since fork comes in bag of 16, to achieve 16, she only need a single bag of fork.

Answer:

560

Step-by-step explanation:

        547      

14 | 7658

    -7000

       658

     - 560

          98

        - 98

            0

Answer:

The inequality is this 9.99+.35x>12

It cant be over 12 so it has to be less than or equal to 12. The most amount of toppings you can have is 5.

:)

Answer:

9.99 + 0.35x > 12

Step-by-step explanation:

Answer:

y=3

Step-by-step explanation:

-2y+9=3

Step 1: Subtract 9 from both sides.

−2y+9−9=3−9

−2y=−6

Step 2: Divide both sides by -2.

−2y /−2  =  −6 /−2

y=3

Answer:

y=3

Answer:

y=3

Step-by-step explanation:

Subtract 9 from both sides.

−2y=3−9

Simplify  3-9 to -6

-2y=-6−2y=−6

Divide both sides by -2

​​ y= -6/-2

Two negatives make a positive.

y= 6/2

simplify

y=3

hope i helped

-lvr

Answer:

4(-1)

Step-by-step explanation:

Answer:

4(-1)

Step-by-step explanation:

Answer: E. 2

Step-by-step explanation:

x²=9

x=±3 ⇔ since it is square (any value after square will always be positive), the value can be negative or positive.

There are 2 solutions: 3 and -3

Hope this helps!! :)

Answer:

the answer is 57.12

Step-by-step explanation:

so the area of the rectangle is 74.24, thats where you get the 8 x 9.28, which is important. so next we're going to go is 9.28-5 which equals 4.28, and that is what the total bottom of 2 triangles would be, (if you drew a rectangle around it). the you would divide 4.28 by 2 to get 2.14, which is the value of 1. next you do 2.14 x 4 and get 8.56. then divide 8.56 by 2 and get back to 4.28. you take 4.28 and multiply it by 4 to get 17.12. from there on you do, 74.24 - 17.12 and get 57.12.

Answer:

750 rupees is used to make shirt

250 rupees is profit

Step-by-step explanation:

If the retailer sold the shirt for 1000 rupees and got 25% profit then that means 1/4 is profit and 3/4 is how much the retailer spent to make the shirt.

So 1000 times 3/4 is 750 which is how much the shirt really cost and

1000 times 1/4 is 250 and that is the retailers profit.

Step-by-step explanation:

the answer is 42 because 2 times the 21 equals 42

Answer:

Step-by-step explanation:

[tex]7+4y=39\\\\\mathrm{Subtract\:}7\mathrm{\:from\:both\:sides}\\7+4y-7=39-7\\\\\mathrm{Simplify}\\4y=32\\\\\mathrm{Divide\:both\:sides\:by\:}4\\\frac{4y}{4}=\frac{32}{4}\\\\Simplify\\y =8[/tex]

Answer:

y = 8

Step-by-step explanation:

7 + 4y = 39

Rearrange:

4y + 7 = 39

Subtract 7 from both sides:

4y + 7 = 39

     - 7     -7

4y = 32

Divide both sides by 4:

4/4 = y

32/4 = 8

y = 8

Answer:

$2.86 thats how much sh gets back

Answer:2.86

Step-by-step explanation: 5 - 2.14 = 2.86

Answer:

a+b+c=180

Step-by-step explanation:

If you already have the first 2 values, add them together and subtract that number from 180. The total of all angles added together should always equal 180.

Answer:

a+b+c= 180

Step-by-step explanation:

Answer:

22

Step-by-step explanation:

Add every other number and it equals the next in line.

2 + 5 = 7

3 + 7 = 10

5 + 10 = 15

7 + 15 = 22

And as proof of concept:

10 + 22 = 32

Answer:

22! Mark the other answer brainleist!

Step-by-step explanation:

2+5 = 7

3+7 = 10

7 + 15 = ?

15 + ? = 32

? must be 22!

Answer:

7/10

Step-by-step explanation:

20 balls.

10 even, 10 odd.

4 numbers less than 5.

That is 14/20 --> 7/10

Most likely.

Probability that the ​number on the ball drawn will be even or less than 5

= 3/5

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event. For an experiment having 'n' number of outcomes, the number of favorable outcomes can be denoted by x. The formula to calculate the probability of an event is as follows.

Probability(Event) = Favorable Outcomes/Total Outcomes = x/n

Given,

Total no. of balls = 20

All balls are numbered with numbered 1 through 20.

Balls with even numbers or less than five:

1, 2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20

No. of balls with even numbers and less than five = 12

Probability that the ​number on the ball drawn will be even or less than 5 = No. of balls with even numbers or less than five/Total balls

                  = 12/20

Probability = 3/5

Hence, 3/5 is the probability that the ​number on the ball drawn will be even or less than 5.

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Answer:

Step-by-step explanation:

I think it's B (GBF=ECF) but I could be wrong. I only took geometry last year but I think that's your best option... good luck!

Answer:

The correct option are;

On a coordinate plane, a cubic function has an x-intercept of (0, 0)

On a coordinate plane, an oval is in quadrant 1

Step-by-step explanation:

Rotational symmetry of a shape is a shape that when it is rotated on its axis to a given angle less than one complete revolution, the shape looks exactly like the pre-image or original appearance of the shape

For a cubic function that has x-intercept = (0, 0) we have;

y = f(x) = a·x³ + b·x² + c·x

Has the shape f a fan blade and therefore, looks the sane when rotated when rotated through 180°

The shape of an oval looks the same when rotated through 180°

Answer:

This graph has rotational symmetry about the point

(0,0).

This graph has rotational symmetry about the point (2,4).

Step-by-step explanation:

second part on edge 2020 !

Answer:

See below

Step-by-step explanation:

[tex]A=\theta[/tex]

[tex]$\sin(90\º - \theta) \cos(90\º - \theta) = \frac{ \tan(\theta)}{1+ \tan^2(\theta)}$[/tex]

According to cofunctions identities:

[tex]\boxed{\sin(90\º - \theta)=\cos(\theta)}[/tex]

[tex]\boxed{\cos(90\º - \theta)=\sin(\theta)}[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{ \tan(\theta)}{1+ \tan^2(\theta)}$[/tex]

Once

[tex]$\tan(\theta)=\frac{\sin(\theta)}{\cos(\theta)} $[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{ \frac{\sin(\theta)}{\cos(\theta)}}{1+ \frac{\sin^2(\theta)}{\cos^2(\theta)}}$[/tex]

Take

[tex]$1+\frac{\sin^2(\theta)}{\cos^2(\theta)}}=\frac{\sin^2(\theta) + \cos^2(\theta)}{\cos^2(\theta)} $[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{ \frac{\sin(\theta)}{\cos(\theta)}}{\frac{\sin^2(\theta) + \cos^2(\theta)}{\cos^2(\theta)} }}$[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{\sin(\theta)}{\cos(\theta)} \cdot \frac{\cos^2(\theta)}{\sin^2(\theta) + \cos^2(\theta)} }$[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{\sin(\theta)}{\cos(\theta)} \cdot \frac{\cos^2(\theta)}{\sin^2(\theta) + \cos^2(\theta)} }$[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{\sin(\theta)\cos(\theta)}{\sin^2(\theta) + \cos^2(\theta)} }$[/tex]

Once

[tex]\boxed{\sin^2(\theta) + \cos^2(\theta)=1}[/tex]

[tex]$\cos(\theta) \sin(\theta) = \frac{\sin(\theta)\cos(\theta)}{1 }$[/tex]

[tex]$\cos(\theta) \sin(\theta) = \sin(\theta)\cos(\theta)$[/tex]

[tex]$\therefore \sin(90\º - \theta) \cos(90\º - \theta) = \frac{ \tan(\theta)}{1+ \tan^2(\theta)}$[/tex]

Answer:

x=-2,2

Step-by-step explanation:

Since this is a quadratic equation, -2 or 2 could be the possible answer

Steps

$3x^2=12$

$\mathrm{Divide\:both\:sides\:by\:}3$

$\frac{3x^2}{3}=\frac{12}{3}$

$\mathrm{Simplify}$

$x^2=4$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{4},\:x=-\sqrt{4}$

Show Steps

$\sqrt{4}=2$

Show Steps

$-\sqrt{4}=-2$

$x=2,\:x=-2$