which equation of c makes this equation true. 12-9+c =12 Pls only direct answers

i don't now all of them but

3.is "A"

4.is "C"

* By definition, the sum of the interior angles of a triangle is 180 degrees.  

* Keeping this in mind, you have:

As you can see, the sum of the other two angles must be 108 degrees, then, let's add the angles given in each option:

A) 9°+9°=18

B) 26°+46°=72°

C)53°+55°=108°

D)72°+108°=180°

*Therefore, the answer is option C.  

5.is "B"

A triangle is called a right triangle when one of it's angles measures 90°.

We have been given the second angle as 14°.

The angles in a triangle add up to 180°.

∴ letting the third angle to be X;

X + 14° + 90° = 180°

X + 104° = 180°

X = 180° - 104°

= 76°

7. the answer is "B"

A = 41 * 14 / 2

A = 574 / 2

A = 287 cm²

So, the area of the trapezoid is 287 cm².

9. is "B"

Area = base x height

Or 356.25=14.25 x Height

Dividing both sides by 14.25

Height =25inches

.Height of the parallelogram is 25 inches. the answer is "B"

10.is "B"

the sum of any 2 sides of a triangle must be greater than the third side

Answer:

The required sample size is 82. This number of people could be sampled in an afternoon, for example, at a commercial center in a city, which means that it is a reasonable sample size for a real world calculation.

Step-by-step explanation:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.99}{2} = 0.005[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.005 = 0.995[/tex], so Z = 2.575.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

Assume that σ=21 and determine the required sample size.

A sample size of n is needed.

n is found when M = 6. So

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

[tex]6 = 2.575\frac{21}{\sqrt{n}}[/tex]

[tex]6\sqrt{n} = 2.575*21[/tex]

Dividing both sides by 3

[tex]\sqrt{n}= 2.575*3.5[/tex]

[tex](\sqrt{n})^2 = (2.575*3.5)^2[/tex]

[tex]n = 81.2[/tex]

Rounding up:

The required sample size is 82. This number of people could be sampled in an afternoon, for example, at a commercial center in a city, which means that it is a reasonable sample size for a real world calculation.

Answer:

Yes, because 2, 3, and 4 siblings added together will pass half of 20 ( the total of everything).

Step-by-step explanation:

Answer:

you did not post a question?

Step-by-step explanation:

Answer:

0.24 pages per hour

Step-by-step explanation:

To solve this you have to divide total pages by the hours to get the speed per hour. Here is the equation;

28 / 116 = 0.2413793103448276

Hope this helps!

Answer:

21 ft by 66 ft

Step-by-step explanation:

From the question,

P = 2(L+W)............... Equation 1

Where P = Perimeter of the playing Field, L = Length of the playing Field, W = width of the playing Field.

If the Length of the Field is 45 ft longer than the width,

L = 45+W............ Equation 2

Substitute Equation 2 into equation 1

P = 2(45+W+W)

P = 90+4W............. Equation 3

Given: P = 174 ft.

Substitute into equation 3

174 = 90+4W

4W = 174-90

4W = 84

W = 84/4

W = 21 ft.

Substituting the value of W into equation 2

L = 45+21

L = 66 ft.

Hence the dimensions of the playing field is 21 ft by 66 ft

Answer:

7cm

Step-by-step explanation:

Answer: There are 20 sets of numbers in the picture, one set is all 1's, which would be having all 5 answers correct.

Divide 1 by 20 to get 5%.

The answer is A.

Step-by-step explanation:

Answer:

tsc = 8*1*10 = $80

twc = 8*20*0.0667*12 = $128.06

tc = 80 + 128.06 = $208.06

Step-by-step explanation:

To find the total expected costs for an 8 hour period, first you must find the total service costs (tsc) and the total waiting costs (twc) as the two costs are what make up the total cost (tc).

Total service cost = (the number of channels)(cost per channel)

tsc = m*Cs

There is only 1 employee so the number of channels is 1.

The cost for this channel is $10 per hour, so 10 * 8 hours in the day.

Total waiting cost = (total time spent waiting by all arrivals)(cost of waiting)

twc = (number of arrivals)(average wait per arrival) Cw

The number arrivals is at the rate of 20 per hour.

The average wait per arrival was found as Wq previously.

                 Wq = 20/(30*(30-20)) = 0.0667 hours

The cost of waiting (Cw) is the $12 per hour multiplied by the 8 hour day.

Total Expected Cost for an 8 hour day is the sum of the total service cost plus the total waiting cost.

Answer:

1/8(smallest), 3/4(greatest)

Step-by-step explanation:

3/8=0.375

1/4=0.250

1/8=0.125

1/2=0.500

3/4=0.750

5/8=0.625

Answer:

46

Step-by-step explanation:

7 x 6 + 8 − 16 ÷ 4

42+8-16 ÷4

42+8-4

50-4

46

Answer:

46

Step-by-step explanation:

the answer is 46 may i be marked brainliest?

Answer:

Answer: The whole numbers for which the products and sum are equal is 1, 2 and 3.

Step-by-step explanation:

Solution: To find the three whole numbers in such a way that their product and sum should be equal. Assume that the three numbers are x, y and z.

Answer:

54-(6x4)

Step-by-step explanation:

6x4=24

54-24=30

The numeric expression is: 54-(6x4)

The value of the expression is: 30

So sorry if I'm wrong.

Answer: 10 minutes

Step-by-step explanation:

x·1/20 + x·1/25 + x·1/100 = 1

Multiply each term by 100 to clear the equation of all fractions

100x/20 + 100x/25 + 100x/100 = 100

5x + 4x + 1x = 100

10x = 100

x = 10

The answer is 10 minutes

Answer:

option c tangent is equal to 1 at 45°

and greater than 1 at 60° .

Answer:

3.99928901529

Step-by-step explanation:

multiply 12.5 by 4.5 and you get 56.25 and you divide 225 by 56.25 and you get 3.99928901529

Answer:

x = 8

Step-by-step explanation:

[tex]\frac{6}{x}[/tex] = [tex]\frac{3}{4}[/tex]

cross multiply

3x = 6(4)

3x = 24

divide

x = 8

21 is the answer you are looking for.

Step-by-step explanation:

First, plug in the numbers for the variables:

[tex]20-5(-3) + 2(8)[/tex]

Then use order of operations to solve, begin with parenthesis:

[tex]20-15+16[/tex]

Subtract:

[tex]5 +16[/tex]

Add:

[tex]5+16=21[/tex]

So,

[tex]20-5y+2x=21[/tex]

The correct answer is 21

Answer:

FALSE

Step-by-step explanation:

In order to solve this equation,

First, we must write it out

3(x - 5) = 2(x - 5) + x

Then, we must use the Distributive Property

3x - 15 = 2x - 10 + x

Next, we must Combine Like Terms

3x - 15 = 3x - 10

Finally, we can Subtract The Coefficients

-15 = -10

Because -15 does not equal to -10, this equation has no solution

IT IS FALSE

if you have more questions, comment me below or add another question

Answer:

mean:-3

median:5

mode: all values appeared once  

range:169

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

ayah

Step-by-step explanation:

Answer: it's H^+ and OH^- ions

Step-by-step explanation:

Answer:

three point five multiplied by four

Step-by-step explanation:

To write 3.5 times 4 using words, we can say:

"Three point five times four."

We know that, "Three point five" refers to the number 3.5, which is a decimal number.

In words, we read the decimal point as "point."

"Times" indicates multiplication.

When we say "times" between two numbers, it means we are multiplying them together.

"Four" represents the number 4, which is the second number in the multiplication.

so, we have, all together, "Three point five times four" means we are multiplying the decimal number 3.5 by the whole number 4.

The result of this multiplication is 14 because 3.5 times 4 equals 14.

To learn more on multiplication click:

brainly.com/question/5992872

#SPJ6

Answer:

sience -2 is to the left of 2

_

. 3

Answer:

45 I believe.* u no ketchup