MATHEMATICS MIDDLE SCHOOL

You randomly draw a marble from a bag of marbles that contains 8 blue marbles, 5 green marbles, and 8 red marbles.

Answers

Answer 1

Answer:

Answer:

$0.76$

Step-by-step explanation:

Probability = Number of favorable outcomes / Number of possible outcomes

There are $16$ favorable outcomes ( the $8+8=16$ marables that are either blue or red).

There are $21$ possible outcomes (the $8+5+8=21$ total marables).

P (draw a blue or red marable) $= (16)/(21)$ ≈ $0.76$

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Fill in the boxes plz. Thanks

Urgent!!! PLEASE HELP, FAST!!!All the items on the sale rack were 75 percent off their original price.
(empty table is shown)
If Jill bought an item on the sale rack and saved a total of $84, what is the value of x in the table above? (x=1/4)

84 = 3/4
how much is 1/4?
possible answers:
$21
$28
$84 - not
$112 - not

Answers

The best way to solve this is to put it into a proportion:
$(x)/(84) = ( (1)/(4) )/( (3)/(4) )$
So you cross multiply to get:
$21= (3)/(4) x$ (the 21 is from $(1)/(4)$ •84)
Then multiply by $(4)/(3)$
And you get $28, so the reduced price would be $28.

Cual es la simplificacion de 66/81

Answers

Answer:

Hence the simplification of $(66)/(81)$ is $(22)/(27)$

Step-by-step explanation:

" Simplification is the process of replacing a mathematical expression by an equivalent one, that is simpler (usually shorter),

for example: Simplification of a fraction to an irreducible fraction ".

Here we are given a fraction as:

$(66)/(81)$

As both the numerator and denominator are divisible by a factor of 3 hence we take out the common factor and obtain the reduced fraction which is further irreducible.

As 66=3×22 and 81=3×27

Hence $(66)/(81)=(3*22)/(3*27)=(22)/(27)$

Hence the simplification of $(66)/(81)$ is $(22)/(27)$

Can you please answer the question in the attachment?

Answers

15a) The answer is 3x+10
b) you could have 3x 4x and 5x
c) 4x+2 (you add up the 3 expressions and divide by 3)

I can't see your attachment

1/2r + 2(3/4r - 1) = 1/4r + 6

Answers

$(1)/(2)r+2((3)/(4)r-1)=(1)/(4)r+6\n\n(1)/(2)r+2*(3)/(4)r-2\cdot1=(1)/(4)r+6\n\n(1)/(2)r+(3)/(2)r-2=(1)/(4)r+6\n\n(1+3)/(2)r-2=(1)/(4)r+6\n\n(4)/(2)r-2=(1)/(4)r+6\n\n2r-2=(1)/(4)r+6\ \ \ \ \ \ |add\ 2\ to\ both\ sides\n\n2r=(1)/(4)r+8\ \ \ \ |subtract\ (1)/(4)r\ from\ both\ sides$

$1(3)/(4)r=8\n\n(1\cdot4+3)/(4)r=8\n\n(7)/(4)r=8\ \ \ \ \ |divide\ both\ sides\ by\ (7)/(4)\ (multiply\ both\ sides\ by\ (4)/(7))\n\nr=8\cdot(4)/(7)\n\nr=(8\cdot4)/(7)\n\nr=(32)/(7)\n\n\boxed{r=4(4)/(7)}$

Luz earns $400 for 40 hours of work. How much will he earn for 6 hours

Answers

divide 400 by 40 which is 10 so you get $10 an hour and 10x6 = $60

60$ since 400/40 is 10 and 10*6 is60

Can two squares of different sizes have the same perimeter

Answers

No. All four sides of a square have the same length, so each square's perimeter is 4s. If you make insert any number in there, the output will always be different.

s I y
--------
1 I 4
2 I 8
3 I 12
4 I 16
...

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40% of what number is 82