A typical tip in a restaurant is 15\% of the total bill. If the bill is $80, what would the typical tip be?

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Explanation:

There are 7 dimes and 3 pennies, leading to 7+3 = 10 coins total.

The probability of not picking a penny is 7/10. If the first coin is put back, then the probability doesn't change for the second selection.

The probability of getting two dimes is (7/10)*(7/10) = 49/100 when the first coin is replaced.

If the first coin is not replaced, then the answer would be (7/10)*(6/9) = 42/90 = 7/15

I'd say 13, hope this helps

Step-by-step explanation:

Answer:

x = {-1/5, 1}

Step-by-step explanation:

(5x - 2)² - 1 = 8

Add 1 to both sides

(5x - 2)² = 9

Take the square root of both sides

5x - 2 = ±3

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

Solution I for 5x - 2 = +3

5x - 2 = 3

add 2 to both sides

5x = 5

Divide both sides by 5

x = 1

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

Solution II for 5x - 2 = -3

5x - 2 = -3

add 2 to both sides

5x = -1

Divide both sides by 5

x = -1/5

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

x = {-1/5, 1}

Answer:

20 cyclists

Step-by-step explanation:

In 2007 only two bikes are there which mean only 20 cyclists participated and that is the least amount out of all years

Answer:

if each bicycle is ten go by multipls of 10

it's in 2007

and of you count by 10 that's 20

Answer:

0 because it's purified water :)

Step-by-step explanation:

Answer:

40

Step-by-step explanation:

answer is right there, you only asked for a number.

Answer:

It depends on how much effort that you put in preparing and working on sample questions to write this exam. It takes continual time and dedication and cannot be hoped to be achieved/aced within a few hours.

Answer:

20x+4

Step-by-step explanation:

4×5x=20x (Because 4×5 is 20 and just ignore the "x" for now)

4×1=4

Answer:

1580

Step-by-step explanation:

i don't really have an explanation

Answer:

a. At the 0.05 level of significance,  there is evidence that the mean life is different from 6,500 hours.

b. The p value= ≈ 0.00480 for z- test which is less than 0.05 and H0 is rejected .

The p value= 0.006913 for t- test which is less than 0.05 and H0 is rejected for 49 degrees of freedom.

c. CI [6583.336 ,6816.336]

d.  The range of CI [6583.336 ,6816.336] tells that the cfls having a different mean life lie in this range.

Step-by-step explanation:

Population mean = u= 6500 hours.

Population standard deviation = σ=500 hours.

Sample size =n= 50

Sample mean =x`=  6,700 hours

Sample standard deviation=s=  600 hours.

Critical values, where P(Z > Z) =∝ and P(t >) =∝

Z(0.10)=1.282  

Z(0.05)=1.645  

Z(0.025)=1.960  

t(0.01)(49)= 1.299

t(0.05)= 1.677  

t(0.025,49)=2.010

Let the null and alternate hypotheses be

H0: u = 6500 against the claim Ha: u ≠ 6500

Applying Z test

Z= x`- u/ s/√n

z= 6700-6500/500/√50

Z= 200/70.7113

z= 2.82=2.82

Applying  t test

t= x`- u /s/√n

t= 6700-6500/600/√50

t= 2.82

a. At the 0.05 level of significance,  there is evidence that the mean life is different from 6,500 hours.

Yes we reject H0  for z- test as it falls in the critical region,at the 0.05 level of significance, z=2.82 > z∝=1.645

For t test  we reject H0   as it falls in the critical region,at the 0.05 level of significance, t=2.82 > t∝=1.677 with n-1 = 50-1 = 49 degrees of freedom.

b. The p value= ≈ 0.00480 for z- test which is less than 0.05 and H0 is rejected .

The p value= 0.006913 for t- test which is less than 0.05 and H0 is rejected for 49 degrees of freedom.

c. The 95 % confidence interval of the population mean life is estimated by

x` ±  z∝/2  (σ/√n )

6700± 1.645 (500/√50)

6700±116.336

6583.336 ,6816.336

d. The range of CI [6583.336 ,6816.336] tells that the cfls having a different mean life lie in this range.

Answer:

Segment

Step-by-step explanation:

Its only part of the line.

Answer:

The answer is ray

Step-by-step explanation:

Answer:

340.4 in³

Step-by-step explanation:

volume= (½× 8 × 6.9 × 10) + (⅓×½×8×6.9×7)

= 276 + 64.4 = 340.4 in³

Answer:

B is your answer

Step-by-step explanation:

(50.40 + 309.60) divided by 144 = 2.50

Answer:

See Explanation

Step-by-step explanation:

Required

Complete the term and identify the rule

[tex](a)\ 5, 6, 8, [], 15[/tex]

We have:

[tex]5 + 1 = 6[/tex]

[tex]6 + 2 = 8[/tex]

[tex]8 + 3 = 11[/tex] --- Missing term

[tex]11 + 4 = 15[/tex]

The rule is:

Add current term to the position of term

i.e.

[tex]T_{n+1} = T_n + n[/tex]

[tex](b)\ 18, 20, 24, [], 38[/tex]

We have:

[tex]18 + 2*1 = 20[/tex]

[tex]20 + 2*2 = 24[/tex]

[tex]24 + 2 * 3 = 30[/tex] --- Missing term

[tex]30 + 2 * 4 = 38[/tex]

The rule is:

Add current term to twice the position of term

i.e.

[tex]T_{n+1} = T_n + 2 *n[/tex]

[tex](3)\ 14, 17, 20, 23, [][/tex]

We have:

[tex]14 + 3 = 17[/tex]

[tex]17 + 3 =20[/tex]

[tex]20 + 3 = 23[/tex]

[tex]23 + 3 = 26[/tex] --- Missing term

The rule is: Add 3

i.e.

[tex]T_{n+1} = T_n + 3[/tex]

[tex](4)\ 24, 30, 36, 42, [][/tex]

We have:

[tex]24 + 6 = 30[/tex]

[tex]30 + 6 = 36[/tex]

[tex]36 + 6 = 42[/tex]

[tex]42 + 6 = 48[/tex] --- Missing term

The rule is: Add 6

i.e.

[tex]T_{n+1} = T_n + 6[/tex]

[tex](5)\ 1, 10, 100[/tex]

We have:

[tex]10^0 = 1[/tex]

[tex]10^1 = 10[/tex]

[tex]10^2 = 100[/tex]

[tex]10^3 = 1000[/tex] -- Missing term

The rule is: 10 to the power of current position

i.e. [tex]T_n = 10^n[/tex]

Answer:

A is the answer

Step-by-step explanation:

ΔABC has the following angle measures:

∡A:  87°  (reason: given)

∡B:  23°   (reason: given)

∡C:  70°  (reason: sum of all interior angles in a triangle is 180)

Answer:

I hope it can help

Step-by-step explanation:

Yan po sana maka tulong

Answer:

$1800

Step-by-step explanation:

9514 1404 393

Answer:

  $2850

Step-by-step explanation:

The basic idea is that each line of the table is use for that portion of the income that falls in the range for that line of the table. Then the tax amounts are added together.

Another way to do it is to rewrite the table to use the full tax rate on the full income, then subtract a "discount" applicable to that line. Using that method in the attached spreadsheet, we have computed the tax to be $2850 on income of $60,000.

Answer:

A satellite is a moon, planet or machine that orbits a planet or star. ... Usually, the word "satellite" refers to a machine that is launched into space and moves around Earth or another body in space. Earth and the moon are examples of natural satellites. Thousands of artificial, or man-made, satellites orbit Earth.

Step-by-step explanation:

Answer:

false

(ignore)

arbol manzana lodo charco

Answer:

24

Step-by-step explanation:

We are given a leg and the hypotenuse, and we can put what we have into the pythagorean theorem formula:

a^2 + b^2 = c^2

7^2 + b^2 = 25^2

49 + b^2 = 625

b^2 = 576

b = 24

Answer:

21

Step-by-step explanation:

Add 5.3 + 1.7 and you get 7 (7 is the base of the triangle). Multiply 7 by the height (6) and you get 42. When you put 2 triangles together, it will create a quadrilateral. "Cut the quadrilateral in half" and you will get your triangle's area. The area is 21 :)

Answer:

53.9 square units was my answer, but I learned that it was 21 !

Answer:

Column 1(X)      Column 2(mean - X)

  125                   -13

  137                     -1

  138                     0

  145                     7

  145                     7

Mean = 138

Mean Absolute Deviation : 5.6

Answer:

for all the lazy readers on top the answer is.. B. 5.6:)

Step-by-step explanation:

answer:

2. 10 km

4. 20 km

step-by-step explanation:

2 — 5 X 2 = 10 km

4 — 10 X 2 = 20 km

Answer:

D

Step-by-step explanation:

Answer:

question one is D I think

Answer:

perimeter = 32-4y

Step-by-step explanation:

perimeter = 2(length +width)

Answer:

10 ft away

Step-by-step explanation:

do pythagorean theorum

24^2 + b^2 = 26^2

576 + b^2 = 676

*subtract 576 from both sides*

b^2 = 100

*find square root of 100*

b = 10

Answer:

6. peach , plum, crab apple

7. pepper tree, common apple, pear

8. because the graph is lowered And that the boxes are needed to go higher to get to the other numbers and the graph is misleading and etc.

9. black cherry, magnolia, live oak, sweet cherry.

10.because the graph is lowered And that the boxes are needed to go higher ot get to the other numbers and the graph is misleading

Step-by-step explanation:

I don't really understand 8 and 10 so this all i got

Answer:

8.2

Step-by-step explanation:

a^2+b^2=c^2

7.6*7.6=57.76

3.2*3.2=10.24

57.76+10.24=68

square root of 68= 8.2