(7+2³)÷3=?


Brainliest

Answer:

A

Step-by-step explanation:

Some photos look cut off but from what I can see the trend line in graph A fits the best since the line is the correct slope and captures the most data points out of all the answers.

Graph (A) shows the best fit of the line because it has a positive slope and the line is very close to the dots, option (A) is correct.

A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

[tex]\rm m = \dfrac{n\sum xy-\sum x \sum y}{n\sum x^2 - (\sum x)^2}[/tex]

[tex]\rm c = \dfrac{\sum y -m \sum x}{n}[/tex]

We have a dot plot shown in the picture.

As we can see in the given picture, the values of independent and dependent variables increase, which means the slope of the line should be positive.

In graph (A) the line of the best fit is very close to the dots and best describes the data.

Thus, graph (A) shows the best fit of the line because it has a positive slope and the line is very close to the dots option (A) is correct.

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Answer:

c=(0,–3) , R= 4

choose (B)

Answer:

The completed ordered pair are;

(0, 1), (-1, -1), and (1, 3)

Step-by-step explanation:

The ordered pair, (x, y), presents the corresponding values of 'x' and 'y' based on a given relationship, or equation

The given relationship between 'x', and 'y' is, y = 2·x + 1

Therefore, given that the x-values (first of two values, separated by the coma) are given, we have;

In the given incomplete pair (0, ), when x = 0, therefore, y = 2 × 0 + 1 = 1

The complete ordered pair is (0, 1)

Similarly, for (-1, ), we have;

When x = -1, y = 2 × (-1) + 1  = -1

The complete ordered pair is (-1, -1)

We also have for the incomplete pair, (1, )

When x = 1, y = 2 × 1 + 1 = 3

The complete ordered pair is (1, 3)

The completed ordered pair for the equation, y = 2·x + 1, are therefore;

(0, 1), (-1, -1), and (1, 3).

Answer:

8(n-2)

Step-by-step explanation:

Difference means subtraction

Times is multiply

First find the difference of n and 2

(n-2)

Then multiply by 8

8(n-2)

Answer:

a

Step-by-step explan

Answer:

it's C I took the test and put a and got it wrong

Step-by-step explanation:

Answer:

A.

[tex] - 1 \frac{1}{3} [/tex]

Answer:

[tex]c=\sqrt{65}=8.062.[/tex]

Step-by-step explanation:

[tex]\text{Consider } \bigtriangleup DBC, \text{by Pythagoras}\\DB^2+BC^2=DC^2 \\\Rightarrow b^2=DC^2-BC^2\\\Rightarrow b^2= 5^2-3^2=25-9\\\Rightarrow b^2= 16\\\text{Then } , b=4.\\ \text{Consider } \bigtriangleup DBA, \text{by Pythagoras}\\DB^2+BA^2=DA^2\\\Rightarrow c^2=b^2+BA^2\\\Rightarrow c^2=4^2+7^2\\\Rightarrow c^2=16+49\\\Rightarrow c^2=65\\\text{Then } , c=\sqrt{65}=8.062.[/tex]

15×12 6×2 9×-5 all Expressions

Answer:

3/8 or 37.5

Step-by-step explanation:

60/160 simplified

Answer:

3/8

Step-by-step explanation:

60/160 is simplified

Answer:

values of x that makes the expression true are less than -2/23

Step-by-step explanation:

GIven the expression

23x + 7 ≤5

Subtract 7 from both sides

23x+7-7 ≤5 -7

23x < -2

x ≤ -2/23

Hence the values of x that makes the expression true are less than -2/23

9514 1404 393

Answer:

  see below

Step-by-step explanation:

The x-values in each table are evenly-spaced (increasing by 2). So, the quadratic function can be identified by its second differences: they will be a non-zero constant.

Table 1 has first differences that are constant at 3. -2-(-5) = 3, for example. It represents a linear function.

Table 2 has first differences of 4, 8, 4, 4, neither constant, nor linearly increasing. The function does not have a name.

Table 3 has first differences of -9, -3, +3, +9, and these have differences of +6. This represents a quadratic function.

Table 4 has first differences of 0.5, 1, 2, 4. These have a constant ratio, as do the values in the table. It represents an exponential function.

The table that represents a quadratic function is C. Table 3.

A quadratic function simply means a function that's in the form of f(x) = ax² + bx + c.

In this case, the table that represents a quadratic function is table 3. It has first differences of -9, -3, +3, +9, and these have differences of +6. It can be deduced that in the quadratic function, b and x are numbers.

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Answer:

Hello! answer: 250

Step-by-step explanation:

10 × 5 = 50

10 × 5 = 50

10 × 5 = 50

10 × 5 = 50

5 × 5 = 25

5 × 5 = 25

50 × 4 = 200

200 + 25 + 25 = 250 the total surface area is 250 hope that helps!

Answer:

25 meters .

Step-by-step explanation:

The actual width of the rectangle is 24.5 meters.

The area of rectangle equals the base(width) times the height.

A = w × h

Given

Area of rectangle = 500 square meters.

Length of rectangle = 4x - 3 meters

Width of rectangle = 2x + 6 meters

Area of rectangle = length × width

500 = (4x - 3) (2x + 6)

⇒ 500 = [tex]8x^{2}+24x-6x-18[/tex]

⇒ 500 = [tex]8x^{2}+18x-18[/tex]

⇒ 500 = [tex]2(4x^{2}+9x-9)[/tex]

⇒ [tex]\frac{500}{2}=4x^{2}+9x-9[/tex]

⇒ [tex]250=4x^{2}+9x-9[/tex]

⇒ [tex]4x^{2}+9x-9-250=0[/tex]

⇒ [tex]4x^{2}+9x-259=0[/tex]

⇒ 4x(x + 7) -37(x + 7) = 0

⇒ (x + 7) (4x - 37) = 0

⇒ x = -7, x = [tex]\frac{37}{4}[/tex]

-7 is not satisfied because it is a negative number.

By substituting x = [tex]\frac{37}{4}[/tex] in width of rectangle

Actual width of rectangle = 2x + 6

= 2( [tex]\frac{37}{4}[/tex]) + 6

= [tex]\frac{37}{2}[/tex] + 6

= [tex]\frac{37+12}{2}[/tex]

= [tex]\frac{49}{2}[/tex]

= 24.5 meters

Hence, the actual width of the rectangle is 24.5 meters.

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Arithmetic

To round, go to the length behind it.

2,413

If it is four or under, you keep the four and, you must turn everything to the left side to zero.

If it is five and up, turn the number into 3000.

Note: This cannot be rounded to 2,500 and 2,400 due to the question being asked.

Meaning, the equation formed is:

5x2,000=10,000

Answer: 10,000

Step-by-step explanation:

the equation is 5 x 2000=10,000

because 1 - 4 let it stay and 5-9 higher up the grade so is was a 2 but you don’t look at the 2 it depends on the number that’s next to it which is 4 and that Means it stays and everything turns into a zero except the two remains it means 5×2000 = 10,000

i hope this helps

Answer:

Step-by-step explanation:

Solve this by adding the volume of the cylinder with the volume of the cone.  The volume of a cylinder is found from the equation:

pi * r^2 * h

In this case that gives pi * 50^2 * 30 = 75000pi

The area of the cone is found from the equation:

pi * r^2 * h *1/3

In this case you get pi * 50^2 * 10 * 1/3=  8333.pi

Add the two to ger 83333.333*pi ~261799

Answer:

[tex]f(10)= 236196[/tex]

Step-by-step explanation:

Given

[tex](x,y) = (0,4)[/tex] --- y intercept

[tex]b = 3[/tex] --- growth factor

Required

[tex]f(10)[/tex]

An exponential function is represented as:

[tex]y = ab^x[/tex]

[tex](x,y) = (0,4)[/tex] means

[tex]4=a * b^0[/tex]

[tex]4=a *1[/tex]

[tex]a= 4[/tex]

So, we have:

[tex]y = ab^x[/tex]

[tex]y = 4(3)^x[/tex]

or

[tex]f(x)= 4(3)^x[/tex]

When x is 10, the value of the function is:

[tex]f(x)= 4(3)^x[/tex]

[tex]f(10)= 4(3)^{10[/tex]

[tex]f(10)= 236196[/tex]

Answer:

y = 1/6x -4

Step-by-step explanation:

First find the slope

m= ( y2-y1)/(x2-x1)

m=(-5 - -3)/( -6 -6)

   = (-5+3)/ (-6-6)

       = -2/-12

       = 1/6

The slope intercept form is

y= mx+b where m is the slope and b is the y intercept

y = 1/6 x +b

Substitute a point into the equation

-5 = 1/6(-6) +b

-5 = -1+b

Add 1 to each side

-4 = b

y = 1/6x -4

Answer:

y=1/6x-4

Step-by-step explanation:

Answer:

Step-by-step explanation:

As,

Integers includes whole numbers, and negative of the whole numbers.

And Rationals includes every fraction, Integers and negative fraction.

So,

170, -25, and 74 are both Integers and Rationals.

But,

Only 3/10 is a fraction included only in rationals and not in Integers

Answer:

1.1+2. =3

2.1+2+3 =6

3.1+2+3+4 =10

4.1+2+3+4+5=15

5.1+2+3+4+5+6=21

6.1+2+3+4+5+6+7=28

triangle numbers

Answer:

Step-by-step explanation:

Diagram  (n)               Number of circles  ([tex]T_n[/tex])

 1                                       3

 2                                      6

 3                                      10

 4                                       15

 5                                       21  

 6                                       28

Pattern:

      [tex]T_n = \frac{(n+1)(n+2)}{2}[/tex]          

Where n = diagram number,        

OR

Diagram                                               Number of circles

 1                                                                  1 + 2

 2                                                                 1 + 2 + 3

 3                                                                  1 + 2 + 3 + 4

 4                                                                  1 + 2 + 3 + 4 + 5

 5                                                                  1 + 2 + 3 + 4 + 5 + 6

 6                                                                  1 + 2 + 3 + 4 + 5 + 6 + 7

 n                                                                  1 + 2 + 3 + 4 + 5 + . . . + (n + 1)  

Answer:

infinitely

many solutions hope that helps

Answer:

Infinitely many solutions

Step-by-step explanation:

Hi there!

When two graphs intersect each other at one distinct point, it has one solution.

When two graphs don't intersect each other at all, there are no solutions.

When two graphs completely overlap each other, there are infinite solutions. This is the case here; the two lines completely overlap each other and it's as if  we're looking at one line.

I hope this helps!

Step-by-step explanation:

Volume is the measure of the capacity that an object holds. For example, if a cup can hold 100 ml of water up to the brim, its volume is said to be 100 ml. Volume can also be defined as the amount of space occupied by a 3-dimensional object or solid shape.

Answer:

the amount of space that a substance or object occupies.

basically the volume of a container, like space in a container.

Answer:

a = -16  b = 8 and c =24

Step-by-step explanation:

h = -16t^2 + 8t + 24

A quadratic function can be in the form

ax^2 + bx+c

Replace x with t

-16 is the coefficient of the squared term  8 is the coefficient of the linear term and 24 is the constant

a = -16  b = 8 and c =24

Answer:

2

Step-by-step explanation:

if BF is the mid-segment of the triangle ADG then its measure will be half of the measure of AG so 0.5*8=4 by the (mid-segment theorem)

then CE is the mid-segment of triangle BDF, so its measure is will be half of BF, so 0.5*4=2

Answer:

CE = 2

Step-by-step explanation:

The midsegment is half the length of the third side of the triangle, then

BF = [tex]\frac{1}{2}[/tex] × DG = [tex]\frac{1}{2}[/tex] × 8 = 4 , and

CE = [tex]\frac{1}{2}[/tex] × BF = [tex]\frac{1}{2}[/tex] × 4 = 2

Answer:

the triangle is not a right angle

Step-by-step explanation:

5²+12²=169

15²=225

Answer:

x = 9.75

Step-by-step explanation:

We know that Triangle ABC and DEF are congruent, therefore;

[tex]\frac{CB}{FE} = \frac{AB}{DE}[/tex]

[tex]\frac{12}{9 }=\frac{13}{x}[/tex]

=> 12*x = 9*13

=> 12x = 117

=> x = 117 / 12

=> x = 9.75

Hope this helps!

Answer:

Approximately 198 grams will remain in the sample after 12 hours.

Approximately 1.09 grams will remain after three days.

Step-by-step explanation:

We can write an exponential function to model the situation. The exponential model for decay is:

[tex]\displaystyle A=A_0(r)^{t/h}[/tex]

Where A₀ is the initial amount, r is the rate of decay, t is the time that has passed (in this case in hours), and h is the half-life.

Since the half-life of the chemical, astatine, is 8 hours, h = 8 and r = 0.5. The initial amount is 560 grams. Hence:

[tex]\displaystyle A=560\left(\frac{1}{2}\right)^{t/8}[/tex]

To find when the sample will have approximately 198 grams, remaining, let A = 198 and solve for t:

[tex]198=560(0.5)^{t/8}[/tex]

Solve for t:

[tex]\displaystyle \frac{198}{560}=\frac{99}{280}=\left(\frac{1}{2}\right)^{t/8}[/tex]

Take the natural log of both sides:

[tex]\displaystyle \ln\frac{99}{280}=\ln\left(\left(\frac{1}{2}\right)^{t/8}\right)[/tex]

Using logarithm properties:

[tex]\displaystyle \frac{t}{8}\ln\frac{1}{2}=\ln\frac{99}{280}[/tex]

So:

[tex]\displaystyle t=\frac{8\ln(99/280)}{\ln(0.5)}=11.9994...\approx 12\text{ hours}[/tex]

Approximately 198 grams remain in the sample after 12 hours.

Three days is equivalent to 72 hours. Hence, t = 72:

[tex]\displaystyle A(72)=560\left(\frac{1}{2}\right)^{72/8}=1.09375\approx 1.09\text{ grams}[/tex]

Approximately 1.09 grams of astatine will remain after three days.