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sweet [91]
3 years ago
9

Please help me! i need the answer really quick!

Mathematics
2 answers:
Viefleur [7K]3 years ago
3 0

Answer:

The average of the grade is 7.

Step-by-step explanation:

Add all of the grades up then divide by the number of grades there are

8+8+5=21

21÷3=7

Have a blessed day! I hope my answer was helpful!!

Sati [7]3 years ago
3 0

Answer:

The answer is 7

Step-by-step explanation:

So, we need to distribute the mean, (AKA:) average.

There is a rule when finding the average of numbers.

That rule is:

Adding all of the numbers together and dividing that sum by how many numbers there are in total that you added together.

1. First, we to add 8 and 8.

2. 8 + 8 = 16

3. Next, we need add to 5 to that 16.

4. 5 + 16 = 21

5. Since we have 3 numbers, we need to divide that 21 by 3.

6. 21 / 3 = 7

Thus showing that our answer is 7.

When trying to find the mean of numbers, always remember the rule of finding the average.

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kolbaska11 [484]
Yes, because if you divide 4 and 3 by 2, you get 2 and 1.5
5 0
3 years ago
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Help please for 40 points!! This is due tonight and i don’t know how to do it
Fofino [41]

Answer:

x = -8

m∠BDC = 68°

General Formulas and Concepts:

<u>Pre-Algebra </u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Geometry </u>

  • Definition of a Line: A line is 180°

Step-by-step explanation:

<u>Step 1: Set up Equation</u>

m∠BDC + m∠CDA = 180°

(-7x + 12)° + (-8x + 48)° = 180°

<u>Step 2: Solve for x </u>

  1. Combine like terms:                    -15x + 60 = 180
  2. Isolate x term:                              -15x = 120
  3. Isolate x:                                       x = -8

<u>Step 3: Find m∠BDC </u>

  1. Define:                    m∠BDC = (-7x + 12)°
  2. Substitute in x:       m∠BDC = (-7(-8) + 12)°
  3. Multiply:                  m∠BDC = (56 + 12)°
  4. Add:                        m∠BDC = 68°
5 0
3 years ago
Use the definition of continuity and the properties of limits to show that the function f(x)=x sqrtx/(x-6)^2 is continuous at x
qaws [65]

Answer:

The function is  continuous at  x = 36

Step-by-step explanation:

From the question we are told that

      The  function is f(x)  =  x *  \sqrt{ \frac{x}{ (x-6) ^2 }  }  

       The  point at which continuity is tested is  x =  1

Now from the definition  of continuity ,

   At function is continuous at  k if  only  

       \lim_{x \to k}f(x)  =  f(k)

So

      \lim_{x \to 36}f(x)  =  \lim_{n \to 36}[x *  \sqrt{ \frac{x}{ (x-6) ^2 }  }]

                            = 36 *  \sqrt{ \frac{36}{ (36-6) ^2 }  }

                             = 7.2

Now  

     f(36) = 36  *  \sqrt{ \frac{36}{ (36-6) ^2 }  }

     f(36) = 7.2

So  the given function is continuous at  x =  36

because

          \lim_{x \to 36}f(x)  =  f(36)

7 0
3 years ago
What is a simplified form of the expression 7x – 5(x + 1)?
Maru [420]

Answer:2.5

Step-by-step explanation:

3 0
3 years ago
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1/3 1/4 3/8 7/24 5/12 which is the biggest
Sati [7]

Answer: 5/12

Step-by-step explanation:

4 0
3 years ago
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