|2x + 5| = 13 please show work

Answer:

B-7^2x2÷b6

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

b(x) = |x + 4|

b(-10) = |-10 + 4|

b(-10) = |-6|

b(-10) = 6

Best of Luck!

Answer:

10

Step-by-step explanation:

2 + x = 12

Subtract 2 from both sides.

x = 10

~theLocoCoco

Answer: B

Step-by-step explanation:

Answer:

5 calories

Step-by-step explanation:

So, Raquel will burn 5 calories in 1 minute.

I hope this helps!

Answer:

This means for every packet of ketchup, Phillip has 6 french fries.

Step-by-step explanation:

Let , side lawn is a.

Area of boundary is :

[tex]A=4\times5\times a\\\\A=20a\ m^2[/tex]

Now, total cost is given by :

[tex]T=20a\times 36.25\\\\90625=725a\\\\a=125\ m[/tex]

Area left is :

[tex]A'=a^2-20a\\\\A'=125^2-20\times 125\ m^2\\\\A'=13125\ m^2[/tex]

Price to empty space with turfs is :

[tex]P=A'\times 20\\\\P=13125\times 20\\\\P=262500[/tex]

Therefore, the cost of covering the empty space with turfs at the rate of Rs 20 per sq. metre is Rs 262500.

Hence, this is the required solution.

Answer:

B.5

Step-by-step explanation:

Answer:

19

Step-by-step explanation:

The value of the x will be 19. Then Maria solved an equation correctly.

The solution of the equation means the value of the unknown or variable.

The equation is given below.

3(x + 6) = 5(x – 4)

Maria solved an equation as shown below.

3 (x + 6) = 5 (x – 4)

 3x + 18 = 5x – 20

        38 = 2x

         19 = x

           x = 19

Then Maria solved an equation correctly.

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Answer:

Step-by-step explanation:

we are given that these two fractions are equal. however, 20/r is just given in numerators and denominators that are four times as large, even though it is still equal to 5/7. we can tell this because 20 is 4 times larger than 5, which means that R must be 4 times larger than 7, right? YES. so we take 7*4 to get 28.

Answer:

(11b^2 + 7) (11b^2 - 7)

Explanation:

Since both terms are perfect squares, factor using the difference of squares formula,  a^2 - b^2 = (a + b) (a - b) where a = 121b^4 and b = 49

Answer:

D

Step-by-step explanation:

Answer:

its 2,2

Step-by-step explanation:

2.4 is wrong

The width of the rectangle in feet will be 2.2 feet.

Let W be the rectangle's width and L its length. Then the area of the rectangle will be

Area of the rectangle = L × W square units

And the perimeter of the rectangle will be

Perimeter = 2(L + W)

A rectangle's area and perimeter have the same numerical value. The length of the rectangle is 22 feet. Then we have

L × W = 2(L + W)

22W = 2(22 + W)

11W = W + 22

10W = 22

W = 2.2 feet

The width of the rectangle in feet will be 2.2 feet.

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Answer:

No.

Step-by-step explanation:

If a decimal repeats forever, it will be irrational.

Hey there!☺

[tex]Answer:\boxed{\text{Rational}}[/tex]

[tex]Explanation:[/tex]

.333333 is rational because any integer, fraction, and a repeating and terminating decimals are rational. So, therefore,  .333333 is rational.

Hope this helps!

Answer:

20.5 hours

Step-by-step explanation:

143.50/7=20.5

Hope this helps and can I have brainliest!

I hope this helps you

Answer:

R0, 90°

Step-by-step explanation:

Answer: For the first one you would describe the rotation as "-x,-y" because you would be rotating it 180 degrees. The second one would be rotating it "180" degrees.

Answer:

The answer is

Step-by-step explanation:

The distance between two points can be found by using the formula

[tex]d = \sqrt{ ({x1 - x2})^{2} + ({y1 - y2})^{2} } \\ [/tex]

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(4,-9) and (-6,-10)

The distance between them is

[tex]d = \sqrt{ ({4 + 6})^{2} + ( { - 9 + 10})^{2} } \\ = \sqrt{ {10}^{2} + {1}^{2} } \\ = \sqrt{100 + 1} \: \: \\ = \sqrt{101} \: \: \: \: \: \: \: \: \: \\ = 10.04987...[/tex]

We have the final answer as

[tex] \sqrt{101} \: \: \: or \: \: \: 10.05 \: \: \: \: units[/tex]

Hope this helps you

Answer:

The cost of M apples is M($0.20).

Explanation:

We don't know how many apples exactly, we only know that it is the quantity of M. Since each apple is $0.20, we can multiply that by M to get the amount of "$0.20's" for M apples.

Answer:

f(x) = 7

Step-by-step explanation:

even functions have all even powers of x

7 = 7x^0

Answer:

5.6 miles

Step-by-step explanation:

From the question, we can infer that this is an inversely proportionality question.

Let us represent Miles per hour = N

Depth of snow = s

Where k is proportionality constant.

dN/ds = k/s

dN = ds .k/s

Integrating this

∫dN = ∫k/s ds

N = k In s + C

Step 1

We find k

From the question, we are told that:

Given that 20 miles per hour are cleared when the depth of the snow is 2.5 inches

11 miles per hour are cleared when the depth of the snow is 7 inches,

20 = k ln 2.5 + C ..... Equation 1

11 = k ln 7 + C...... Equation 2

11 = k ln 7 + 20 - k ln 2.5

Collect like terms

k ln 2.5 - k ln 7 = 20 - 11

k( In 2.5 - In 7) = 9

k = 9/( In 2.5 - In 7)

k = 9/ -1.0296194172

k = -8.7410938932

Step 2

We find C

20 = k ln 2.5 + C ..... Equation 1

C = 20 - k ln 2.5

C = 20 -(-8.7410938932 In 2.5)

C = 20 + 8.7410938932 In 2.5

C = 20 + 8.0093833208

C = 28.0093833208

Step 3

how many miles of road will be cleared each hour when the depth of the snow is 13 inches

N = k In s + C

= -8.7410938932 ln 13 + 28.0093833208

= -22.420463165 + 28.0093833208

= 5.5889201559

Approximately= 5.6 miles

Therefore, 5.6 miles of road will be cleared each hour when the depth of the snow is 13 inches.

Answer:

102 people

Step-by-step explanation:

Hope this helps :-)

I've attached the complete question.

Answer:

Only participant 1 is not cheating while the rest are cheating.

Because only participant 1 has a z-score that falls within the 95% confidence interval.

Step-by-step explanation:

We are given;

Mean; μ = 3.3

Standard deviation; s = 1

Participant 1: X = 4

Participant 2: X = 6

Participant 3: X = 7

Participant 4: X = 0

Z - score for participant 1:

z = (x - μ)/s

z = (4 - 3.3)/1

z = 0.7

Z-score for participant 2;

z = (6 - 3.3)/1

z = 2.7

Z-score for participant 3;

z = (7 - 3.3)/1

z = 3.7

Z-score for participant 4;

z = (0 - 3.3)/1

z = -3.3

Now from tables, the z-score value for confidence interval of 95% is between -1.96 and 1.96

Now, from all the participants z-score only participant 1 has a z-score that falls within the 95% confidence interval.

Thus, only participant 1 is not cheating while the rest are cheating.

Answer:

24 cups

Step-by-step explanation:

1. 1 egg= 4 cups of flour

Let x = # of eggs, and f = cups of flour

so f=4x

2. f= 4(6)

f =24

So the answer is 24 cups of flour

Answer: mutiply 4 by 6 which is 24

The given statement is false.

Dilation is a transformation that changes the size of a figure or an object without changing its shape.

The figure or object and its image after dilation are similar.

The size of the figure or object may increase or decrease based on a number called the scale factor.

Dilation is defined by a point called the center of dilation and the scale factor.

Dilation :-

A dilation does not change the shape of a figure, but it can change the size. Because the size of the figure changes, dilations are not isometries. Because the shape is invariant under a dilation, the original figure and its image are similar. If the proportion is greater than one, the figure will grow.

In reference to a triangle,

They scale distances between points, dilations do not change angles. All lengths of line segments in the plane are scaled by the same factor when we apply a dilation.

Hence, the given statement is false.

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Answer:

a

  point estimate  is   [tex]\r p = 0.355[/tex]  i.e 35.5 %

  confidence interval  is  [tex]0.3081 < p<0.4019[/tex]

b

  point estimate  is   [tex]\r p = 0.244[/tex]  i.e 24.4 %

   confidence interval   [tex]0.2064 < p<0.2816[/tex]

c

 The confidence intervals you computed in parts a and b does not suggest that a greater number of U.K. ads use humor

Step-by-step explanation:

Considering the first question

   The  sample size is n  =  400

   The  number of ads that use humor is  k =  142

Generally the  point estimate is mathematically represented as

       [tex]\r p = \frac{k}{n}[/tex]

=>     [tex]\r p = \frac{142}{400}[/tex]

=>     [tex]\r p = 0.355[/tex]

Given that the confidence level is  95% then the level of significance is

      [tex]\alpha =( 100 -95)\%[/tex]

=>    [tex]\alpha =5\%[/tex]

=>    [tex]\alpha =0.05[/tex]

From the normal distribution table the critical value for [tex]\frac{\alpha }{2}[/tex] is  

        [tex]Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} } = 1.96[/tex]

Generally the standard error is mathematically represented as

       [tex]SE = \sqrt{\frac{\r p(1 - \r p)}{n} }[/tex]

=>    [tex]SE = \sqrt{\frac{0.355(1 - 0.355)}{400} }[/tex]

=>    [tex]SE = 0.0239[/tex]

Generally the margin of error is mathematically represented as

      [tex]E = Z_{\frac{\alpha }{2} } * SE[/tex]

      [tex]E = 1.96 * 0.0239[/tex]

      [tex]E = 0.0469[/tex]

Generally the 95% confidence interval is  

      [tex]\r p - E < p < \r p + E[/tex]

=>   [tex]0.355 - 0.0469 < 0.355 + 0.0469[/tex]

=>    [tex]0.3081 < p<0.4019[/tex]

Considering the second question

   The  sample size is n  =  500

   The  number of ads that use humor is  k =  122

Generally the  point estimate is mathematically represented as

       [tex]\r p = \frac{k}{n}[/tex]

=>     [tex]\r p = \frac{122}{500}[/tex]

=>     [tex]\r p = 0.244[/tex]

Generally the standard error is mathematically represented as

       [tex]SE = \sqrt{\frac{\r p(1 - \r p)}{n} }[/tex]

=>    [tex]SE = \sqrt{\frac{0.244(1 - 0.244)}{500} }[/tex]

=>    [tex]SE = 0.0192[/tex]

Generally the margin of error is mathematically represented as

      [tex]E = Z_{\frac{\alpha }{2} } * SE[/tex]

      [tex]E = 1.96 * 0.0192[/tex]

      [tex]E = 0.0376[/tex]

Generally the 95% confidence interval is  

      [tex]\r p - E < p < \r p + E[/tex]

=>   [tex]0.244 - 0.0376 < 0.244 + 0.0376[/tex]

=>    [tex]0.2064 < p<0.2816[/tex]

Considering third question

  Looking at the confidence interval in a(first question ) and  b(second question)  we see that the upper limit of both interval is not up to or greater than   0.5 i.e 50% hence the confidence intervals you computed in parts a and b does not suggest that a greater percentage of U.K ads uses humor

Answer:

  $542.50

Step-by-step explanation:

Isaiah's weekly earnings will be ...

  ($15.50 /h)(35 h/wk) = $542.50 /wk