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stiv31 [10]
3 years ago
5

How do i calculate a new average with the old average

Mathematics
1 answer:
padilas [110]3 years ago
7 0
Answer: to calculate the new average after then nth number, you multiply the old average by n−1, add the new number, and divide the total by n. In your example, you have the old average of 2.5 and the third number is 10.
Hope this helped!!
Could I get brainliest by chance?!
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The perimeter of the square is equal to the perimeter of the triangle. What are the side lengths of each figure? square: ? units
blsea [12.9K]

Answer:

<em>Square= 12 units</em>

<em>Triangle long sides= 19 units</em>

<em>Triamgle short side= 10 units</em>

Step-by-step explanation:

<em>It is a square, so all sides are the same.  That means 3x+3 equals 4x.  What number can be subsituted into x to equal 4?  If x is 3, then 3x+3 would be 3(3)+3.  It equals 12.  4 times 3 is also 12.  It works!  That also means the square's side is 12 units.</em>

<em>Square= 12 units</em>

<em />

<u><em>So, x=3</em></u>

<em />

<em>The triangle's longer sides are 7x-2.  Subsitute x in, which is 3, and you get 7(3)-2.  It equals 19.  The two longer sides of the triangle are the same length, so both are 19 units.</em>

<em>Triangle long sides= 19 units</em>

<em />

<em>The triangles shorter side is 2x+4.  Subsitute 3 in for x and you get 2(3)+4.  It equals 10, so the shorter side is 10 units.</em>

<em>Triangle short side= 10 units</em>

7 0
3 years ago
Read 2 more answers
Please help me with this problem
aleksandr82 [10.1K]

9514 1404 393

Answer:

  (x, y) = (-3, -13) or (-8, -23)

Step-by-step explanation:

The values for y can be equated and the resulting quadratic solved by factoring.

  2x -7 = x^2 +13x +17

  0 = x^2 +11x +24 . . . . . . subtract 2x-7

  0 = (x +8)(x +3) . . . . . . . .factor*

The values of x that make these factors zero are x=-8 and x=-3. The corresponding values of y are ...

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  y = 2(-3) -7 = -13

The solutions are ...

  (x, y) = (-8, -23) and (-3, -13)

_____

* The constants in the binomial factors are factors of 24 that total 11. You know that ...

  24 = 1×24 = 2×12 = 3×8 = 4×6

The sums of these factors are 25, 14, 11, 10. The factors 3 and 8 are the constants in the binomial factors of the quadratic.

"24" is the constant in the quadratic. "11" is the coefficient of the x term.

6 0
3 years ago
Polygon F has an area of 36 square units. Aimar drew a scaled version of Polygon F and labeled it Polygon G. Polygon G has an ar
timofeeve [1]

Answer:

1/3

Step-by-step explanation:

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6 0
3 years ago
Based on the results of the simulation, if 224 groups are formed, about how many of them would you expect to contain one student
trapecia [35]

Answer: what's the results of the stimulation?, there's not much info to answer your question.

Step-by-step explanation:

5 0
3 years ago
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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Nady [450]

Answer:  b) -0.625

<u>Step-by-step explanation:</u>

The formula for the z-score is:

z=\dfrac{x-\mu}{\sigma}\\\\\bullet z \text{ is the z-score}\\\bullet x \text{ is the value}\\\bullet \mu \text{ is the mean}\\\bullet \sigma \text{ is the standard deviation}\\\\z=\dfrac{6-8}{3.2}\\\\\\.\ =\dfrac{-2}{3.2}\\\\\\.\ =\large\boxed{-.0625}

6 0
3 years ago
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