Can someone pls identify the mistake and how to correct it

Answer:

Step-by-step explanation:

Step-by-step explanation:

the first thing we notice : the quadrilateral has 2 pairs of equally long sides with 2 angles being openly 90°.

so, we are dealing with a rectangle here.

we know that one pair of the sides (NK = LM) are 24 cm long.

and we know that KL:LM = 3:4.

that means that the pair KL = MN are the shorter sides of the rectangle. and their length is according to the ratio 3/4 of NK=LM.

3/4 × 24 = 18 cm

the area of that rectangle is therefore

18 × 24 = 432 cm²

Answer:-9

Step-by-step explanation:

Answer:

-9

Step-by-step explanation:

It is -9 because, using order of operations, you need to do the parentheses first. 25 + 15 is 40. Then, you do subtraction. 31-40=-9.

Hope this helps :)

Answer:

x = -2

y = 2

Step-by-step explanation:

In addition to my explanation, I will include a graph.

Since both equations are in slope-intercept form [tex]y=mx+b[/tex], where m is the slope of the line and b is the y-intercept, we can easily plot both lines.

First you plot the first points, which are (0,-4) and (0,4).

Next, we can use rise over run to determine where our next points will go.

Rise over run is just taking the slope as a fraction and using that to move points. For example, a slope with 3/4 would mean I move my points 4 spots to the right on the x-axis and 3 up on the y-axis. Every whole number is that number with #/1, so for the first equation we go right 1 spot and down 3 spots. For the next equation we go up 1 and right one. Keep doing this until you have a line formed and find where the lines intersect, or share a point.

Answer: A≈2827.43cm²

Step-by-step explanation:

A= πr² =π·30²≈2827.43339cm²

Answer:

14.56

Step-by-step explanation:

Answer:

Your answer would be 14.56.

Step-by-step explanation:

Answer:

y = -3x + 14.

it's my answer

Answer:

Step-by-step explanation:

Convert the given equation into slope - intercept form:

The matching choice is B

The liter of oil tin contained

The liter of oil used and leak

The liter of oil left in the tin

~nightmare 5474~

Answer:

2.2 l of oil was left.

Step-by-step explanation:

[tex]Total=10\frac{3}{5} =10.6l\\Used=7\frac{1}{10} =7.1l\\Leaked=1\frac{2}{7} =1.28l\\[/tex]

Total used=7.1l+1.28l=8.38l

[tex]Left=10.6l-8.38l=2.22l[/tex]

Answer:

The answer is A

Step-by-step explanation:

Using an exponential function, it is found that:

a) The base is of 0.877.

b) The half-life of cobalt-60 is of 5.3 years.

A decaying exponential function is modeled by:

[tex]A(t) = A(0)(1 - r)^t[/tex]

In which:

Item a:

Each year the amount present is reduced by 12.3%, hence [tex]r = 0.123[/tex], and the base is:

[tex]1 - r = 1 - 0.123 = 0.877[/tex]

Item b:

This is t for which A(t) = 0.5A(0), hence:

[tex]A(t) = A(0)(0.877)^t[/tex]

[tex]0.5A(0) = A(0)(0.877)^t[/tex]

[tex](0.877)^t = 0.5[/tex]

[tex]\log{(0.877)^t} = \log{0.5}[/tex]

[tex]t\log{0.877} = \log{0.5}[/tex]

[tex]t = \frac{\log{0.5}}{\log{0.877}}[/tex]

[tex]t = 5.3[/tex]

The half-life of cobalt-60 is of 5.3 years.

You can learn more about exponential functions at https://brainly.com/question/25537936

substitution
y = 7x-26 (1)

y = 4x-11 (2)

1⇒2

7x-26=4x-11

3x=15

x=5

y = 7(5)-26

y = 9

point (5,9)

Answer:

42

Step-by-step explanation:

Answer:

7.85 m (3 significant figures)

Step-by-step explanation:

Formula:   arc length = [tex]2\pi r(\frac{\theta}{360} )[/tex]

The radius of a circle is half the diameter, so r = 10 ÷ 2 = 5

Therefore, arc length = 2 x [tex]\pi[/tex] x 5 x [tex](\frac{90}{360} )[/tex]

                                    = [tex]\frac{5}{2}\pi[/tex]

                                    = 7.853981634...

                                    = 7.85 m (3 significant figures)

Answer:

slope

[tex] = \frac{y2 - y1}{x2 - x } \\ [/tex]

[tex] \frac{5 - j}{ - 9 - 4} = - 1 \\ \frac{5 - j}{- 13} = - 1 \\ 5 - j = 13 \\ - j = 13 - 5 \\ - j = 8 \\ j = - 8[/tex]

Answer: $2000

Step-by-step explanation:

Variable cost = Change in cost ÷ Activity change

($2000 - $2000) ÷ (10000 - 8000) = $0

Fixed cost element = Final cost - Variable cost

$2000 - ($0.00 ×10000) = $2000

Therefore, the cost formula for total maintenance is $2000 plus $0 per hour

y = $2,000 + $0x

At a level of 8,700 machine-hours, the total cost is:

y = $2000 + ($0.00 ×8700) = $2000

The graph is an illustration of a linear function

The term that can be used to describe Dan's earning is that he earns $10.25 per hour

From the graph, we have the following ordered pairs

(x,y) = {(4,41) (7,71.75)}

The slope (m) is then calculated as:

[tex]m = \frac{y_2 -y_1}{x_2 -x_1}[/tex]

So, we have:

[tex]m = \frac{71.75 - 41}{7 -4}[/tex]

Simplify

[tex]m = \frac{30.75}{3}[/tex]

Evaluate the quotient

[tex]m = 10.25[/tex]

Hence, Dan's hourly earning is $10.25 per hour

Read more about linear functions at:

https://brainly.com/question/15602982

Answer:

x-intercept: [tex]\bigg(\frac{5}{2}, \:0\bigg)[/tex]

y-intercept: [tex](0,\:5)[/tex]

Step-by-step explanation:

To find the x-intercept, substitute in [tex]0[/tex] for [tex]y[/tex] and solve for [tex]x[/tex].

[tex]-4x + 7 = 2y - 3[/tex]

[tex]-4x+7=2\left(\bold{0}\right)-3[/tex]

Simplify 2(0):                                          [tex]-4x+7=2\cdot \:0-3[/tex]

Subtract 0 - 3 = -3:                         [tex]-4x+7=-3[/tex]

Subtract 7 from both sides:          [tex]-4x+7-7=-3-7[/tex]

Simplify:                                         [tex]-4x=-10[/tex]

Divide both sides by -4                [tex]\frac{-4x}{-4}=\frac{-10}{-4}[/tex]

[tex]\bold{x=\frac{5}{2}}[/tex]

To find the y-intercept, substitute in [tex]0[/tex] for [tex]x[/tex] and solve for [tex]y[/tex].

[tex]-4x + 7 = 2y - 3[/tex]

[tex]-4(\bold{0})+7=2y-3[/tex]

Switch sides:                               [tex]y-3=-4\left(0\right)+7[/tex]

Simplify -4(0):                              [tex]2y-3=-0+7[/tex]

Add 3 to both sides:                  [tex]2y-3+3=7+3[/tex]

Simplify:                                      [tex]2y=10[/tex]

Divide both sides by 2:             [tex]\frac{2y}{2}=\frac{10}{2}[/tex]

[tex]\bold{y=5}[/tex]

Answer:

  add the opposite of the constant

Step-by-step explanation:

The opposite of the constant must be added to the expression:

  (x +14.1) +(-14.1) = x +(14.1 -14.1) = x +0 = x

Answer:

Catherine's GPA is 2.48

Step-by-step explanation:

A z-score of 2.010 means that Catherine's GPA is 2.01 standard deviations above the mean. Therefore, Catherine's GPA is [tex]\bar{x}+2.01\sigma=1.963+2.01(0.257)\approx2.48[/tex]

Answer:

AC is b

[tex]tan55 = \frac{15}{b} [/tex]

15/tan55 = b

tan 55 = 1.428

15/1.428 = 10.5 cm = AC

Answer:

THIS IS THE ANSWER

Step-by-step explanation:

Answer:

how to get a mean of the data in the morning and after some time

Answer:

  B.  30x

  D.  x(45-15)

Step-by-step explanation:

The distributive property lets you factor out the common factor of x. The sum of coefficients can be simplified to a single coefficient.

  45x -15x = x(45 -15) = 30x

Answer:

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Step-by-step explanation:

Using the normal distribution, it is found that x = 3.5 has a z-score of -2, which means that it is 2 standard deviations below the mean.

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

In a normal distribution with mean  and standard deviation , the z-score of a measure X is given by:

The z-score measures how many standard deviations the measure X is from the mean, above or below.  

X∼N(6.5,1.5), which means that .

The measure is

The z-score is:

The measure x = 3.5 has a z-score of -2, which means that it is 2 standard deviations below the mean.

Answer:

B

Step-by-step explanation:

The graph hits the x axis at 5, -2, and -3/

Answer:

5/5=8

Step-by-step explanation:

The identity property means any factor multiplied by 1 (in this case 5/5=1) is itself.

Answer:

D. [tex]\frac{5}{5} * 8[/tex]

Step-by-step explanation:

In identity property of multiplication, any number multiplied by 1 stays the same. Here we need 1 multiply to a number which is 8. Here we can get 1 from only ( 5/5 ) multiplied with 8 and gives as well 8. So the answer is D.