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11Alexandr11 [23.1K]
3 years ago
14

What is the mean of the set 90, 82, 88, 78, 93,

Mathematics
2 answers:
Georgia [21]3 years ago
8 0
You need to add all of your numbers together, then divide by the how many numbers you had before you added them together. You should get 431.
vekshin13 years ago
5 0
431 would be the answer hope this helps
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In a bag, there are 25 marbles. 8 are red and the rest are green. If there are 100 marbles in. a bag, how many are red? *
Sophie [7]

Answer:

32 marbles are red.

Step-by-step explanation:

Think of a quarter, 4 of them equal a dollar.

25 x 4 = 100

So, you will multiply 8 by 4.

8 x 4 = 32

4 0
3 years ago
You are constructing a cardboard box from a piece of cardboard with the dimensions 2 m by 4 m. You then cut equal-size squares f
postnew [5]

Answer:

Dimensions:

l =3,15 m

w=1,15 m

x= 0,42 m   (height)

V(max) = 1,52 m³

Step-by-step explanation:

The cardboard is L = 4 m   and   W = 2 m

Let call x the length of the square to cut in each corner, then, volume of open box is:

For the side L       is  L - 2*x               l =  4 - 2*x

For the side W      is  W - 2*x             w=  2 - 2*x

The height              is  x

Volume of the open box, as function of x is:

V(x) = ( 4 -2x) * ( 2 - 2x) *x    ⇒  V(x) = ( 8 - 8x -4x + 4x²) *x

V(x) = ( 8 -12x + 4x² )*x     V(x) = 8x - 12x² + 4x³

V(x) = 8x - 12x² + 4x³

Taking derivatives on both sides of the equation

V´(x) = 8 - 24x + 12x²

V´(x) = 0       8  - 24x + 12x² = 0     reordering    12x² - 24x + 8  = 0

or    3x² - 6x + 2 = 0

A second degree equation. Solving for x

x₁,₂  = ( 6 ± √36 - 24 ) /6

x₁,₂  = ( 6 ± 3.46) /6

x₁  =  6 + 3,46 /6     x₁  = 1.58  we dismiss such solution because 1,58 * 2 = 3,15 and is bigger than 2 one of the side of the cardboard

x₂  =( 6 - 3,46 ) / 6

x₂  = 0,42 m

Dimensions of the open box

l  = 4 - 2*x     l  = 4 - 0,85      l  =  3,15 m

w = 2 -2*x    w  = 2 - 0,85     w = 1,15 m

x = 0,42 m

V(max) =3,15*1,15*0,42

V(max) = 1,52 m³

8 0
3 years ago
Of 80 t-shirts, 10% are white, 30% are blue and the rest are red. How many are red?
juin [17]
There is 60% of red t-shirts 40% of them are white and blue so the reds are 60%
6 0
3 years ago
Read 2 more answers
Becky is 18 and would like to buy a house when she is 36. What is the discount factor for today's prices if the housing values i
statuscvo [17]
<span>you need to find the amount of years between now and when she wants to buy a home. 36-18= 18. then you take 18 and multiply is by %6. 18x%6 or 18x.06 =108% or 1.08. 

The discount prices for today's housing values compared to 18 years from now with a 6% increase per year would be 108% discount. </span>
3 0
3 years ago
What is the answer for Jessica is making two loaves of banana bread she needs 3/4 of sugar for each lol her measuring cup can on
Rudiy27

Answer: 6

Step-by-step explanation:

1/4 times 3 = 3/4 times 2= 6/4 enough for two loaves.

Mark me as brainliest if this helps!

3 0
3 years ago
Read 2 more answers
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