MATHEMATICS MIDDLE SCHOOL

I need help with these questions?

Answers

Answer 1

Answer:

Answer:

$(2)/((x-1)x(x+1))$ , $(y^4)/(8)$ , and $(2)/(3t)$

Step-by-step explanation:

Let's find a common denominator:

$(x(x+1))/((x-1)x(x+1)) - (2(x-1)(x+1))/(x(x-1)(x+1)) + ((x-1)x)/((x+1)(x-1)x)$

$(x(x+1) - 2(x-1)(x+1)+(x-1)x)/((x-1)x(x+1))$

= $(2)/((x-1)x(x+1))$

2/(x-1)x(x+1)

$((2y^2)^3)/((8y)^2)$

Distribute exponents:

2^3(y^2)^3

__________

8^2(y)^2

Numerator:

2 to the power of 3 equals (2 · 2 · 2) = 8

y to the power of 2 to the power of 3 equals, y to the power of 6 (this is because when exponents in parenthesis are held to the power of another number outside of the parenthesis, you multiply them)

Now let's simplify the denominator:

8 to the power of 2 equals (8 · 8) = 64

y to the power of 2 is just y to the power of 2, so our new expression is:

$(8y^6)/(64y^2)$

Let's cancel the terms further:

8/64 can be simplified to 1/8

And when you cancel exponents, you subtract the denominator's exponent from the numerator's exponent ( $y^(6-2)$ = $y^(4)$ )

Now put them together:

$(1(y^4))/(8)$

Which is,

= $(y^4)/(8)$

y^4/8

$(t+2)/(3t) - (1)/(3)$

The common denominator for both fractions is 3t, so let's make -1/3's denominator 3t by multiplying t to both the numerator and the denominator:

-1 · t

_____ = -1(t)/3t = -t/3t

3 · t

Now let's solve for the numerator:

$(t+2)/(3t) - (t)/(3t)$

(t + 2) - t, the t's cancel out, t - t + 2 = 2

And the denominator stays the same, so it will still equal 3t

Finally, you'll get an answer of

= $(2)/(3t)$

2/3^2

Answer 2

Answer: Hope this helps (it's only thr 1st one tho)
Have a great day, remember to stay hydrated!! :))

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Can somebody plz help 8% is the answer but I don't understand how to get it

Order the values from least to greatest pi,√11,3.4,3.1

Answers

3.1 , 3.4 , 11 would be your answer's

John is about to roll a six-sided, fair number cube 60 times. He wants to predict how many times the cube will land on an even number. He makes a prediction of 20 times. Is it a good prediction? What would your prediction be based on theoretical probability?

Answers

even numbers
so each dice has numbers
1,2,3,4,5,6
the eve numbers are
2,4,6
odd are others
1,3,5
so 1/2 are odd

therefor 1/2 of 60 is how many times it would get even
1/2 of 60=1/2 times 60=30

No not good predicition
my prediction would be 30 tiemes

Your Question:

My answer:

each dice has these 6 numbers

1,2,3,4,5,6

the even out of all of the numbers are

2,4,6

The others are odd (obviously)

1,3,5

So 1/2 are odd.

1/2 of 60 is the number of times it would get even numbers,

1/2 of 60=1/2 times 60=30

My prediction was 30!

→Jessie←

Sandy works at a clothing store. She makes $6 per hour plus earns 15% commission on her sales. She worked 70 hours over the last two weeks and had a total of $2,640 in sales before taxes. Which of the following is closest to how much she will earn in hourly wages and commission for those two weeks?

Answers

420$ in hours , 396$ in commission earnings .

A card was selected at random from a standard deck of cards. The suit of the card was recorded, and then the card was put back in the deck. The table shows the results after 40 trials.What is the relative frequency of selecting a club?

Outcome Club Diamond Heart Spade
Number of trials 8 12 11 9

A.
17%

B.
20%

C.
25%

D.
30%

Answers

the answer is d.) 20%

Is 50 a multiple of 5

Answers

Yes it is just count by 5's

50 is a multiple of 5 because 5x10=50

6.53 + 1.4 / (0.7 + 0.1). ( / - this is a division sign just incase you dont know)

Answers

aright i figured it out:)
step one we need to remember PEMDAS
P : (parentheses)
E : exponents ³
M : multiplication x
D : division ÷
A : addition +
S : subtraction -
i always remembered this by using this one sentence
"P"lease "E"xcuse "M"y "D"ear "A"unt "S"ally
but that's a different topic;) lets solve our problem
6.53 + 1.4 ÷ (0.7 + 0.1)
well lets follow along with out PEMDAS and first i see parentheses as our first step. So lets solve what we have within our Parentheses.
0.7 + 0.1 = 0.8 now lets plug in what we have
6.53 + 1.4 ÷ 0.8 now i see another step we can do here and thats division
1.4 ÷ 0.8 = 1.75 now lets plug in what we finally have
6.53 + 1.75 = 8.28
answer? 8.28
if this was helpful
then don't forget too
MARK ME BRAINLIEST! :D

6.53+1.4/(0.7+0.1)=6.53 + 1.4/.8=6.53 + 1.75=8.28

Answer: 6.53+1.4/(0.7+0.1)=8.28