Which of the following numbers is rational?

A -9
B 5/8
C 0
D All Of Above

Answer:

The correct answer is option a.  400

Step-by-step explanation:

Points to remember

Area of square = a²

Where 'a' is the side length of square

To find the area of square

It is given that, the side length of square is 20 inches.

Here a = 20 inches

Area = a²  

 = 20²

 = 400

Therefore the correct answer is option a.  400

Answer:

False

Step-by-step explanation:

In order to circum a circle about a triangle the circles center don't have to be placed at the triangle.

Final answer:

The statement regarding a vector forming a right angle triangle with its components is true, and the Pythagorean theorem can indeed be used to calculate the length of the resultant vector from two perpendicular vectors.

Explanation:

The initial question regarding the center of the circle to circumvent a triangle seems to be incomplete or incorrect. Instead, delving into vector mathematics, which is the relevant context provided, will yield a more informative response.

True or False: A vector can form the shape of a right angle triangle with its x and y components.
This statement is true. A vector in two dimensions has an x-component and a y-component. When these components are drawn from the tail of the vector, they form the legs of a right-angle triangle with the vector itself being the hypotenuse.

Furthermore, it is also true that the Pythagorean theorem can be used to calculate the length of the resultant vector when adding two vectors that are at right angles to each other. The formula used is a² + b² = c², where 'c' is the length of the resultant vector, and 'a' and 'b' are the magnitudes of the original vectors.

Answer:

4.8cm ^3

Step-by-step explanation: just finished quiz.... good luck

Answer: (C) 4.8cm3

Just did it on edge

Answer:B

Step-by-step explanation:i just did it! c:

The situation that is most likely to have a constant rate of change is the length of a brick path compared with the number of rows of bricks. That is option B.

Rate of change of a variable is the change in its value over a defined period of time. But rate of change can be calculated if one variable increases and the other variable which it is compared with decreases.

But in a scenario where both the variables are not changing, a constant is reached. For example, the length of a brick path compared with the number of rows of

bricks.

The length of the brick path is constant which forms the number of the rows of the bricks which are equally constant.

Therefore, the situation that is most likely to have a constant rate of change is the length of a brick path compared with the number of rows of bricks.

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Answer:

(0,5)

Step-by-step explanation:

-2x+6y=30

5x+2y=10

I'm going to use elimination.

I'm choosing this method because both equations are in the same form.

They are in the form ax+by=c.  

So in order to use elimination, I need one of my columns that contain the variables to contain opposites. Neither one of my columns with the variables have that.  Example -2x and 5x are not opposites and 6y and 2y are not opposite.

I'm going to multiply both sides of equation 2 by -3.  This will help me to achieve the opposites in a column.

So the system becomes:

-2x+6y=30

-15x-6y=-30

---------------------If we add the columns you will see that the variable y get's eliminated. Let's do that.

-2x+6y=30

-15x-6y=-30

-------------------Adding!

-17x+0y=0

-17x     =0

    x      =0

So using one of the equations (you choose; doesn't matter which one you pick) along with x=0, I'm going to find y.

I choose equation 2.

That is I choose 5x+2y=10 along with x=0 to find y.

5x  +2y=10 with x=0

5(0)+2y=10

0   +2y =10

       2y=10

         y=10/2

         y=5

The solution is (x,y)=(0,5).

Answer:

D. 18 units

Step-by-step explanation:

This is because . . .

C = 2 * pi * r

Since r = 3 . . .

2 * 3 * 3.1415926 . . .

2 * 3 * 3 = 18 units

Please mark for Brainliest!!  :D Thank you!!

For any questions, please comment!!

Answer: D . 18 units

Step-by-step explanation:

We know that the circumference of the circle is given by :-

[tex]C=2\pi r[/tex], where r is the radius of the circle.

Given : The radius of  the circle = 3 units

Then , the circumference of the circle will be :-

[tex]C=2\pi (3)[/tex]

We know the the value of [tex]\pi =3.14[/tex], we estimate the value of  [tex]\pi =3[/tex]

[tex]C=2(3) (3)=18[/tex]

Hence, the the best estimate of the circumference of this circle is 18 units.

Answer:

first choice

Step-by-step explanation:

The volume of a rectangular prism is L*H*B.

So the volume of the rectangular prism pictured here is 24*10*8

The volume of a triangle prism is 1/2 *H*L*B.

So the volume of the triangle prism pictured here is 1/2 *6*24*8

The volume of the whole figure is the sum of the volume of the rectangular prism and volume of the triangular prism which is in this case:

24*10*8 + 1/2 *6*24*8.

Answer is the first choice.

(It wouldn't be third because 10 has nothing to with the triangular prism part)

Answer:

25/36

Step-by-step explanation:

(2/3)/(24/25)

Solve. Change the division to multiplication, and flip the second fraction:

(2/3) * (25/24)

Multiply across:

(2 * 25)/(3 * 24) = 50/72

Simplify if necessary. Divide common factors:

(50/72)/(2/2) = 25/36

25/36 is your answer.

~

Answer:

√x+3=13

Step-by-step explanation:

The equation is √x+3=13 is radical because the unknown, x appears under a radical sign √.

To solve the equation, the unknown is left on one side of the equal sign and then both sides of the equal sign are raised to an equal power which would remove the radical sign.

For example,

√x+3=13

√x=13-3

√x=10

Removing radical.

(√x)²=10²

x=100

Answer:

hope it help!

Step-by-step explanation:

have a nice day

Graph with its function by translating the graph of y= √x is marked below.

A mathematical phrase, rule, or law that establishes the link between an independent variable and a dependent variable (the dependent variable). In mathematics, functions exist everywhere, and they are crucial for constructing physical links in the sciences. A relation between a collection of inputs and outputs is known as a function. A function is, to put it simply, a relationship between inputs in which each input is connected to precisely one output.

Given,

y = √x

However, y= √x only displays the positive y values on a graph since you can never square a negative integer because no two identical numbers multiplied together are negative, among other reasons.

Making a function is standard. Since a function may only have one value for each input, we define x as the positive real integer such that (√x)2=x for every positive real √x.

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Answer: -2x+10

Step-by-step explanation:

you just multiply x and -5 by -2

Answer:

[tex]x^2=10+\frac{18y^2}{5}[/tex]

Step-by-step explanation:

If you really want to get x^2 by itself the first step is to add 36y^2 on both sides giving you:

[tex]10x^2-36y^2=100[/tex]

[tex]10x^2-36y^2+36y^2=100+36y^2[/tex]

[tex]10x^2+0=100+36y^2[/tex]

[tex]10x^2=100+36y^2[/tex]

Now you divide both sides by 10:

[tex]x^2=\frac{100+36y^2}{10}[/tex]

You could separate the fraction:

[tex]x^2=\frac{100}{10}+\frac{36y^2}{10}[/tex]

You can reduce both fractions:

[tex]x^2=10+\frac{18y^2}{5}[/tex]

Answer:

The graph in the attached figure

Step-by-step explanation:

Let

x-----> the total number of guests

y -----> the amount of meat

we know that

The inequality that represent this situation is equal to

[tex]y\geq \frac{1}{3}x-2[/tex]

Note The inequality is "greater than or equal" because the given statement say "at least"

The solution of this inequality is the shaded area above the solid line [tex]y=\frac{1}{3}x-2[/tex]

The slope of the solid line is positive

The y-intercept of the solid line is -2  

The x-intercept of the solid line is 6

therefore

The graph in the attached figure

Remember that

The values of x an y cannot be a negative number

Answer:

4th graph

Step-by-step explanation:

Answer:

-4

Step-by-step explanation:

We are given the following expression which we are to solve:

[tex] ( - 4 ) 5 - ( - 6 ) ( - 4 ) + 4 0 [/tex]

Since this expression includes brackets as well has plus and minus signs, so we will follow the standard order of operations to solve this expression.

Solving the brackets first to get:

[tex] ( - 2 0 ) - ( 2 4 ) + 4 0 [/tex]

Now adding all the terms up to get:

-4

Answer:

your slope is 3/4

Step-by-step explanation:

when finding the slope you find two points to go by.  

when you find the point for x you count back until you line up with your y point.  like on this graph you start at -3 and count back on the graph until you are in line with your next point which is 5.  

so -3 count back to 5

which is going to be 4

then you count how many spaces there is until you get to five which is 3 spaces so then you just put y over top of x and you have your slope.  

which on this graph your slope will be 3/4

Answer:1

Step-by-step explanation:

4% x 20 patients= 1 patient

On average, for every 25 patients calling in claiming to have the flu, we expect 1 patient to actually have the flu, based on a 4% chance of a patient truly having the flu.

The question is asking us to calculate the expected number of patients who actually have the flu out of 25 who call in, given that the probability of having the flu is 4%. This is a case of the binomial probability distribution, where the number of trials (n) is 25, the probability of success (p) is 0.04, and we want to find the expected value (mean) of this distribution.

The expected value (mean) of a binomial distribution is given by the formula E(X) = n  imes p, where E(X) is the expected value, n is the number of trials, and p is the probability of success on a single trial.

Using this formula, we can calculate the expected value as follows:

E(X) = 25  imes 0.04

E(X) = 1

So, on average, for every 25 patients calling in claiming to have the flu, we expect 1 patient to actually have the flu.

Answer:

V = π(12²)(15) = 2,160π units³

The correct answer is D.

Answer:

720

Step-by-step explanation:

The mean of a set of credit scores is u=690 and o=14.

mean = 690  and standard deviation SD = 14

We use z- score formula

z= 3.3 given

Plug in the values and find out x

Multiply 14 on both sides

46.2 = x- 690

Now add 690 on both sides

x= 736.2

Credit score is 720 that comes under 736.2

51 is 33.3% of the number 153.15

The answer is option C.

Calculation:-

let the number be X,

       33.3% of X =51  (as per the question)

      (X*33.3)/100=51

      X=(51*100)/33.3

      X=51 answer

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Answer:

See explanation

Step-by-step explanation:

You have to graph the system of inequalities presented as

[tex]\left\{\begin{array}{l}y<4x-2\\y\ge -\frac{5}{2}x-2\end{array}\right.[/tex]

Part A:

1. Draw a dotted line [tex]y=4x-2[/tex] (dotted because the sign < is without notion "or equal to"). Select one of two regions by substituting the coordinates of origin into inequality:

[tex]0<4\cdot 0-2\\ \\0<-2[/tex]

Since this inequlity is false, the origin doesn't belong to the shaded region, so you have to shade that part which doesn't contain origin (red part in attached diagram).

2. Draw a solid line [tex]y=-\frac{5}{2}x-2[/tex] (solid because the sign ≥ is with notion "or equal to"). Select one of two regions by substituting the coordinates of origin into inequality:

[tex]0\ge -\frac{5}{2}\cdot 0-2\\ \\0\ge -2[/tex]

Since this inequlity is true, the origin belongs to the shaded region, so you have to shade that part which contains origin (blue part in attached diagram).

The intersection of these two regions is the solution area.

Part B:

Plot point (-2,-2). Since this point doesn't belong to the solution area, this is not a solution of the system of two inequalities. You can check it mathematically - substitute x=-2 and y=-2 into the system:

[tex]\left\{\begin{array}{l}-2<4\cdot (-2)-2\\-2\ge -\frac{5}{2}\cdot (-2)-2\end{array}\right.\Rightarrow \left\{\begin{array}{l}-2<-10\\-2\ge 3\end{array}\right.[/tex]

Both inequalities are false, so (-2,-2) doesn't belong to the solution area.

[tex]-np-80<60\\\\-np<140\\\\n>-\dfrac{140}{p}[/tex]

Answer:

n > -140/p.

Step-by-step explanation:

-np - 80 < 60

-np  < 60 + 80

-n < 140/p

n > -140/p.

Answer:

2.5

Step-by-step explanation:

The positive factors of 12 are 1,2,3,4,6,12

The positive prime factors of 12 are 2 and 3.

(Primes are integer numbers only divisible by themselves and one.)

The arithmetic mean or average of 2 and 3 is (2+3)/2.

(2+3)/2=5/2=2.5

Answer:2/14 or 1/7

Step-by-step explanation:

Add the student together to get the number of students

10+4

14

Divide the girls by half

4/2

2

2/14 is your answer reduced is 1/7

To find the value of the expression -.75-([tex]-\frac{2}{5}[/tex])+.4+([tex]-\frac{3}{4}[/tex]), you convert all terms to decimals, simplify, and add them together, resulting in -0.7.

The value of the expression -.75-([tex]-\frac{2}{5}[/tex])+.4+([tex]-\frac{3}{4}[/tex]) is calculated as follows:

First, convert the fraction [tex]-\frac{2}{5}[/tex] to a decimal to simplify the calculation, which is -0.4.

Next, understand that subtracting a negative is the same as adding the positive equivalent, so -(-0.4) becomes +0.4.

Now, add up the numbers: -0.75 + 0.4 + 0.4 - 0.75.

After performing the addition, we get -0.7 as the final value of the expression.

Answer:

(2,-1)

(-2,1)

(0,1)

Step-by-step explanation:

Let's plug in the points given and see which satisfy it (make it true).

2x+3y>=-1

Test (2,-1)

2(2)+3(-1)>=-1

4    + (-3)>=-1

           1>=-1  This is true 1 is greater than -1 so (2,-1) works!

Test (-6,0)

2(-6)+3(0)>=-1

-12   +  0  >=-1

         -12 >=-1 This is not true. -12 is not greater than -1.

Test (-2,1)

2(-2)+3(1)>=-1

-4   +  3 >=-1

         -1 >=-1  This is true. -1 does equal -1.

Test (0,1)

2(0)+3(1)>=-1

 0  +  3 >=-1

         3>=-1  This is true.  3 is greater than -1.

Test (0,-1)

2(0)+3(-1)>=-1

0   + (-3)>=-1

         -3>=-1  This is false.  -3 is not greater than -1.

To determine which ordered pairs are solutions to the inequality 2x + 3y ≥ -1, we need to substitute the x and y values from each ordered pair into the inequality and check if the inequality holds true.
Let's go through each ordered pair step by step:
1. Check the ordered pair (2, -1):
Substitute x = 2 and y = -1 into the inequality:
2(2) + 3(-1) ≥ -1
4 - 3 ≥ -1
1 ≥ -1
The inequality holds true, so (2, -1) is a solution.
2. Check the ordered pair (-6, 0):
We don't need to evaluate this one because it is not a solution according to the results we are considering.
3. Check the ordered pair (-2, 1):
Substitute x = -2 and y = 1 into the inequality:
2(-2) + 3(1) ≥ -1
-4 + 3 ≥ -1
-1 ≥ -1
The inequality holds true, so (-2, 1) is a solution.
4. Check the ordered pair (0, 1):
Substitute x = 0 and y = 1 into the inequality:
2(0) + 3(1) ≥ -1
0 + 3 ≥ -1
3 ≥ -1
The inequality holds true, so (0, 1) is a solution.
5. Check the ordered pair (0, -1):
We don't need to evaluate this one because it is not a solution according to the results we are considering.
Therefore, the ordered pairs that are solutions to the inequality 2x + 3y ≥ -1 are:
(2, −1)
(−2, 1)
(0, 1)

Answer:

5/8

Step-by-step explanation:

3/8 + 1/4

We need to get a common denominator of 8

3/8 remains 3/8

We change 1/4 by multiplying by 2/2

1/4 *2/2 = 2/8

3/8 + 1/4

3/8+2/8

5/8

Answer:

-20

Step-by-step explanation:

1. multiple: 4 * (5) = -20

2. Compare:

>

= 1 >

(-20) = Yes

Answer:

13. Let's say Jason's age is x, Omar's age is y and Henry's age is z. Then we have:y = 3x (Omar is three times as old as Jason) z = x + 5 (Henry is five years older than Jason) x + y + z = 80 (Their total age is 80) Now replace y and z in the last equation with the two other equations and you get: x + 3x + (x + 5)= 80 Calculate brackets: x + 3x + x + 5 = 80 Move 5 over and add up the x:  5x = 75 x = 75/5 = 15 So Jason is 15. Now we put x = 15 into the other equations and we get: Omar's age: y = 3*15 = 45 Henry's age: z = 15 + 5 = 20 So Omar is 25 years older than Henry.

14.

Let c = chickens and d = ducks, then:

c = 2d

c - 272 = 1/2 (d - 16)

We can rewrite the expression in terms of one variable, d:

2d - 272 = 1/2 (d - 16)

2d - 272 = 1/2d - 8

3/2d = 264

d = 176

c = 2 * 176 = 352

She had 352 chickens in the beginning.

15.

11-shirts

Answer:

4/10 or 40%

Step-by-step explanation:

Their is 10 marbles in all and their is 4 black marbles so,

4/10 or 40%

Hope my answer has helped you and if not i'm sorry.

[tex]|\Omega|=10\\|A|=4\\\\P(A)=\dfrac{4}{10}=\dfrac{2}{5}=40\%[/tex]