if a coin is tossed twice find the probability of getting a) 2 heads b) atleast 1 head c) no heads

Answer:

115

Step-by-step explanation:

It adds 3 every time and starts with -38. Our equation is:

a52 = -38+3(52-1);

a52 = -38 + 153

a52 = 115

Answer:

115

Step-by-step explanation:

→ First we need to work out the nth term. First we find the difference between each term

-38, -35, -32, -29... ⇔ +3

→ We know the first bit is 3n now we have to find the other section. We need to write the 3 times tables on top of each corresponding term

3 ,   6   ,  9  , 12

-38, -35, -32, -29...

→ We can see the to get from 3 to -38 we minus 41. So the nth term is

3n - 41

→ Now we substitute in 52 for n

3 × 52 - 41

→ Simplify

115

Answer:

She can buy 3 candy bags.

Step-by-step explanation:

Let the number of bags = x.

9.5 + 3.5x = 20

3.5x = 10.5

x = 3

Answer: She can buy 3 candy bags.

Answer:

3

Step-by-step explanation:

Answer:

17

Step-by-step explanation:

3m-(m + 5)

Distribute the minus sign

3m -m -5

Combine like terms

2m -5

Let m =11

2*11 -5

22-5

17

Answer:

[tex]17[/tex]

Step-by-step explanation:

[tex]3m-(m + 5)[/tex]

[tex]m= 11[/tex]

Plug m as 11 in the expression.

[tex]3(11)-(11+5)[/tex]

Evaluate.

[tex]33-16[/tex]

[tex]=17[/tex]

Answer:

[tex]\sf x=\frac{1}{10}[/tex]

Step-by-step explanation:

Rewrite expression with bases of 4.

[tex]\sf{4^{\frac{3}{4} }} \times \sf({4^\frac{1}{2} )^x =(4^2)^{\frac{2}{5} }[/tex]

Apply law of exponents, when bases are same for exponents in multiplication, add the exponents. When a base with an exponent has a whole exponent, then multiply the two exponents.

[tex]\sf{4^{\frac{3}{4} }} \times \sf{4^{\frac{1}{2} x}=4^{\frac{4}{5} }[/tex]

[tex]\sf{4^{\frac{3}{4} +\frac{1}{2} x}=4^{\frac{4}{5} }[/tex]

Cancel same bases.

[tex]\sf \frac{3}{4} +\frac{1}{2} x=\frac{4}{5}[/tex]

Subtract 3/4 from both sides.

[tex]\sf \frac{1}{2} x=\frac{1}{20}[/tex]

Multiply both sides by 2.

[tex]\sf x=\frac{1}{10}[/tex]

Step-by-step explanation:

2^{2*3/4} × 2^{x}=2^{4×2/5}

2^{3/2} × 2^{x}= 2^{8/5}

2^{3/2+x}=2^{8/5}

equate powers

{3+2x}/2= 2^2

5{3+2x}= 2{8}

15+10x=16

collect like terms

10x=16-15

10x=1

divide both sides by 10

x=1/10

x=0.1

Answer:

X ^3 (4x+1) (4x-1)

Step-by-step explanation:

Factor x3 out of  16x5−x3

Rewrite 16x2 as  (4x)2

Rewrite 1 as 1^2

Factor

x^3 (4x+1) (4x-1)

I hope I helped

Answer: 7.4 meters

Step-by-step explanation:

Start Mark = 3m

End mark = 25m

Total length to race = 25 - 3 = 22m

Position of both Ario and miguel = 3 meter from one side of the pool; that is 3 meters behind the START MARK

Ario's completed to remain ratio = 1:4

Total ratio = 5

Ario's Completed meters = (22/5) * 1 = 4.4m

Therefore, when Miguel starts the race, Ario will be on (4.4meters + number of meters behind the start mark)

= 4.4 meters + 3 meters = 7.4meters

The distance of Ario from the start point when miguel starts is;

7.44 m

        This means distance of line = 25 - 3 = 22 m

Miguel and his brother Ario are standing 3 m from one side of the pool.

This means that they are both 3 meters behind the start point.

Thus, ario's completed meters when Miguel will start is;

¹/₅ × 22 = 4.4 m

Distance of miguel from Ario when miguel starts = 3 + 4.4 = 7.4 m

Read more about algebra at; https://brainly.com/question/11408596

Answer:450 cm

Step-by-step explanation:

Answer:

Area of a rectangle is w • L

w = 5 while L = (b + 3)

Area is

5 • (b + 3) = 5b + 15

So answer is 2. 3. and 4. which are all similar forms of the same expression.

Step-by-step explanation:

Answer:

they are 16 and 4

Step-by-step explanation:

We can call the numbers x and y and we can write:

x - y = 12

x + y = 20

Adding these equations gives us 2x = 32 which means x = 16 and substituting this value into the first equation gives us y = 4.

Answer:

The numbers are 16 and 4

Step-by-step explanation:

Let the two numbers be x and y

x-y = 12

x+y = 20

Add the two equations together

x-y = 12

x+y = 20

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

2x = 32

Divide by 2

2x/2 =32/2

x = 16

Now find y

x+y =20

16+y =20

Subtract 16

y = 20-16

y = 4

Answer:

  20 km/hr

Step-by-step explanation:

The boat's still-water speed is the average of its speeds against and with the current:

  (15 +25)/2 = 20 . . . km/hr

__

If you want to write equations, you can let b and c represent the speeds of the boat and current in km/hr.

  b - c = 15 . . . . upstream speed

  b + c = 25 . . . . downstream speed

Add these two equations, and you get ...

  (b -c) +(b +c) = (15) +(25)

  2b = 40

  b = 20 . . . . divide by 2

The speed of the boat in still water is 20 km/hr.

Answer:

20 km/hr

Step-by-step explanation:

To solve this, you have to find the average speed it is going. To find this, you just add up all of the speeds mentioned and divide it by the number of speeds you added.

15 +25=40

40/2=20

20km/hr!!!

Good luck on what you are doing I hope you do well! Brainliest would be great :)

Answer:

Step-by-step explanation:

                +2d+30    +2d+30

                    ÷(-15)      ÷(-15)

my mistake it's actually d= -30/19 sometimes I forget you put them in fractions

Answer:

Here we have a triangle rectangle, where the length of one of the cathetus is: 15 (the one at the top)

And the length of the other cathetus is 8 units (i think, i can not see well the image)

Now, if we want to find the angle D.

In this case, the adjacent cathetus is the one of 15 units, and the opposite cathetus is the one of 8 units.

Then we can use the relation:

Tg(A) = (opposite cathetus)/(adjacent cathetus)

So:

Tg(D) = 8/15

D = ATg(8/15) = 28.1°

Now, for the angle F, the adjacent cathetus is the one of 8 units, and the opposite cathetus is the one of 15 units:

F = ATg(15/8) = 61.9°

Answer:

x= 17

Next, find the trigonometry ratios of ∠D.

sin∠D= 8/17

cos∠D= 15/17

tan∠D= 8/15

Finally, find the trigonometry ratios of ∠F.

sin∠F=15/17

cos∠F= 8/17

tan∠F=15/8

Answer:

10.6

Step-by-step explanation:

radius = 1.5 height = 1.5 so it's 10.6

Answer:

10.6

Step-by-step explanation:

Answer:

n = 4

Step-by-step explanation:

4(2n + 3) = 44

Expand the brackets.

4(2n) + 4(3) = 44

8n + 12 = 44

Subtract 12 on both sides.

8n + 12 - 12 = 44 - 12

8n = 32

Divide both sides by 8.

(8n)/8 = 32/8

n = 4

Answer:

1-9, 1929

Step-by-step explanation:

You do the arithmetic and then study the us government postal codes and then you do kid behavior with my names. So, you get 1929 basically, in a nutshell, forever incessantly. thank yopu  

Answer:

Step-by-step explanation:

Hello,

First of all we will take any real number x different from 0, -2, +2 as dividing by 0 is not allowed and then we can write

[tex]\dfrac{( - x - 2)}{x(x^2 - 4)}=-\dfrac{x+2}{x(x-2)(x+2)}=\large \boxed{ -\dfrac{1}{x(x-2)}}[/tex]

because we know that

[tex]x^2-4=x^2-2^2=(x-2)(x+2)[/tex]

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

Answer:

Step-by-step explanation:

Given

Step one:

Company's initial asset value = $11,283,500

Company's final asset value =   $21,794,600

Step two

we can calculate the company's asset appreciation after 10 years as

$21,794,600- $11,283,500= $10,511,100

Step three

Hence, the growth rate of the company's asset value per  year can be expressed as =  $10,511,100/10= $1,051,110

Answer:

40 2/5Ibs or [tex]40\frac{2}{5}[/tex] lbs

Step-by-step explanation:

Let weight of object on the moon be represented = Wm

weight of object on the Earth = We

In the above question, we are told:

The weight of an object on the moon is

5 of its weight on Earth.

Hence, mathematically, this is represented as:

 5Wm = We

If a moon rock weighs 202 lbs on Earth

5Wm = 202lbs

Wm = 202lbs/5

Wm = [tex]40\frac{2}{5}[/tex]Ibs

Therefore, the moon rock weighs [tex]40\frac{2}{5}[/tex]Ibs on the moon.

Step-by-step explanation:

One way of organizing data is by constructing a frequency distribution table. A tally mark is used to record how often a particular score or number occurs. The number of times a score or number appears is called the frequency.

To construct a frequency distribution table:

a. list the scores or numbers from highest to lowest (or lowest to highest),

b. use tally marks to record how often each score or number appears, and

c. count the marks and record it in the frequency column.

Answer:

-x^2 +2x +8

Step-by-step explanation:

f(x) = 2x + 1

g(x) = x^2 – 7,

(f – g)(x) = 2x +1 - ( x^2 -7)

Distribute the minus sign

             = 2x+1 - x^2 +7

Combine like terms

             = -x^2 +2x +8

Answer:

its not true. Answer is (f + g)(x) = x2 + 2x - 6

Step-by-step explanation:

Trust me. Good luck.

Reasoning:

g(x) = 4*ln(x)

g(x) = 2*2ln(x)

g(x) = 2*f(x)

Whatever the output f(x) is, it is doubled to get g(x). Recall that y = f(x), so we're really doubling the y values to visually stretch it vertically by a factor of 2. In short, g(x) is twice as tall compared to f(x).

Answer:

C. g(x) stretches f(x) vertically by a factor of 2.

Step-by-step explanation:

a p e x

Answer:

length = 26.6

width = 11.3

Step-by-step explanation:

1. Set up the equation

(2x + 4)(x) = 300

2. Simplify

2x² + 4x = 300

3. Solve by completing the square

Divide by 2 to make "a" equal to 1

x² + 2x = 150

Find term to complete the square by squaring half of "b"

(2/2)² = 1

x² + 2x + 1 = 150 + 1

Factor perfect square trinomial

√x² + 2x + √1 = 151

(x+1)² = 151

Square root each side

x + 1 = ±12.3

Set up two possibilities and solve

x + 1 = 12.3

x = 11.3

x + 1 = -12.3

x = -13.3

The measurement cannot be negative so width is equal to 11.3

4. Use the width to solve for the length

11.3(2) + 4 = 26.6

The length and width is 26.6 and 11.3.

Since The length of the fence is four more than two times the width.

So here the equation should be

(2x + 4)(x) = 300

[tex]2x^2 + 4x = 300[/tex]

Now

Here we divided by 2

So,

[tex]x^2 + 2x = 150[/tex]

Now we determine the term

[tex](2/2)^2 = 1\\\\x^2 + 2x + 1 = 150 + 1[/tex]

Now applied the Factor perfect square trinomial

[tex]\sqrt x^2 + 2x + \sqrt1 = 151\\\(x+1)^2 = 151[/tex]

Now do the Square root each side

x + 1 = ±12.3

Here we required to set up two possibilities and solve

x + 1 = 12.3

x = 11.3

And,

x + 1 = -12.3

x = -13.3

The measurement should not be negative so the width is equal to 11.3

Now the width is

= 11.3(2) + 4

= 26.6

Therefore, The length and width is 26.6 and 11.3.

Learn more about length here: https://brainly.com/question/4979629

Answer:

Investment B is £97 more than investment A

Step-by-step explanation:

For investment A

£160is saved for 2 years every month

Total amount at the end of the two years= 2*160*12= £3840

The the percentage interest added is

=2.5/100*3840

= £96

Total amount= 3840+96

Total amount=£ 3936

For investment B

£3800 is compounded every year for two years at 3%

Total amount= 3800(1+0.03/2)^(2*2)

Total amount= 3800(1+0.015)^4

Total amount= 3800(1.015)^4

Total amount= 3800(1.061363551)

Total amount= 4033.18

Total amount= £4033

The difference between the two investment= 4033-3936

= £97

Answer:

y = 2x+4

Step-by-step explanation:

The y intercept ( where it crosses the y axis ) is 4

The slope is positive because the line goes up from the bottom left to top right

We pick two point ( -2,0) and ( 0,4)

The slope is found by

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

 = ( 4-0)/(0- -2)

  = 4/ (0+2)

  = 4/2

   = 2

The slope intercept form of a line is

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

y = 2x+4

Answer:

The equation to this line is y=-4x+4

Step-by-step explanation:

If you look at the graph you can see that the y intercept is 4.

To find the slope take two points on the graph and plug it into be y2-y1/x2-x1

I chose (0,-2) and (-1,2) So  2+2=4  and -1-0= -1 so  4/-1= -4

Answer:

C

Step-by-step explanation:

Line of symmetry

Answer:

5

Step-by-step explanation:

If Lisa has x quarters and Brenda has 3x quarters, we can write:

80% * 3x = 4 + (20% * 3x + x) -- We write 4 because 1 dollar =  4 quarters

0.8 * 3x = 4 + (0.2 * 3x + x)

2.4x = 4 + 1.6x

0.8x = 4

x = 5

Answer:

a.  Feelings about weight is the response (dependent) variable.  Sex is the explanatory (independent) variable.  The feelings about weight depend on the sex

b. Summary of  observed counts

                         Women   Men   Total

Overweight        38           18       56

Right weight      99          35      134

Underweight       6          25        31

Number           143           78      221

c. Percentage of the 143 women responding in each category:

1. Overweight = 38/143 = 26.6%

2. Right weight = 99/143 = 69.2%

3. Underweight = 6/143 = 4.2%

d. Percentage of the 78 men responding in each category:

1. Overweight = 18/78 = 23.1%

2. Right weight = 35/78 = 44.9%

3. Underweight = 25/78 = 32%

e. Summary of feelings about weight:

                         Women        Men

Overweight        26.6%        23.1%

Right weight      69.2%        44.9%

Underweight       4.2%         32%

Step-by-step explanation:

a) Data:

Sample size = 221

                       Women    Men   Total

Overweight        38           18       56

Right weight      99          35      134

Underweight       6          25        31

Number            143           78      221

b) To obtain the percentage of feelings about weight for each category, the number of those who feel overweight, right weight, or underweight is divided by the total number of women or men.  The value obtained, which is in decimal form, is then converted to percentage by multiplying with 100.

Answer:

$1,313.3 per month

Step-by-step explanation:

A=p(1+r/n)^nt

P=principal=$75,000

r=interest rate=7.2%=0.072

t=20 years

n=12 months

A=p(1+r/n)^nt

=75,000(1+0.072/12)^12*20

=75,000(1+0.006)^240

=75,000(1.006)^240

=75,000(4.2026)

=315,195

A=$315,195

The term of Lauren's loan=20 years

20 years×12 months=240 months

Lauren's pay per month =$315,195/240

=$1,313.3125

Approximately $1,313.3 per month

Answer:

Nathan weighs 12 more pounds than Marty.

Step-by-step explanation:

If Marty weighs 64 pounds and Nathan weighs 76 pounds, we can subtract the weight of Marty from Nathan to get our answer.

[tex]76-64=12[/tex]

In case Nathan was actually 476 pounds, the answer would be 412.

Answer:

(x + 3)³

Step-by-step explanation:

Use rational root test to check for possible rational roots.

Factors of 27 are 1, 3, 9, and 27.

Factors of 1 are 1.

Possible rational roots are:

±1/1, ±3/1, ±9/1, ±27/1

Checking each one, we find that -3 is a root.  So x + 3 is a factor.

Knowing that, we can use grouping to factor.

x³ + 9x² + 27x + 27

x³ + 9x² + 18x + 9x + 27

x (x² + 9x + 18) + 9 (x + 3)

x (x + 6) (x + 3) + 9 (x + 3)

(x + 3) (x (x + 6) + 9)

(x + 3) (x² + 6x + 9)

(x + 3) (x + 3)²

(x + 3)³