5. Using commutativity and associativity of addition of rational numbers, express each<br />of the following as a rational number. <br />1. 2/5 +7/3+-4/5 +-1/3<br />2. 3/7+-4/9+-11 /7 +7/9<br />3. 2/5+8/3+-11 /15+4/5+-2/3<br />4. 4/7+0+-8/9-13/7+17/21<br /><br /><br /><br />So important please tell me fast. ​

Answers

Answer 1

Answer:

[tex] \LARGE{ \underline{\underline{ \pink{ \bf{The \: AnsWer:}}}}}[/tex]

Composition and Structure of the Oceans. Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water.


Related Questions

what is the equation for the line in slope intercept form plz help ASAP

Answers

Answer:

y = - 4x + 5

Step-by-step explanation:

y = mx + b

(0, b) y-intercept

m = [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]

~~~~~~~~~~

( - 2, 13)

(0, 5) <----- y-intercept

(3, - 7)

(4, - 11)

m = [tex]\frac{-11+7}{4-3}[/tex] = - 4

y = - 4x + 5

Chloe just turned 8 years old and her sister Sheila just turned 14 years old. In how many years will the sum of their ages be equal to 50?
I will make the fastest answer the Brainliest

Answers

14 years. In 14 years Chloe will be 22 and Sheila will be 28. 22+28 is 50.

The side lengths of a triangle are 5, 3, and 4. Is this a right triangle?
A. No, because 32 +42 +52.
B. Yes, because 32 +42 = 52.
C. Yes, because 32 +42> 52.
ОО
D. No, because 3+ 4+5.

Answers

Answer:

B

Step-by-step explanation:

Let me know if this help you IM not too sure but im sure its B but without the graph its little bit hard

Answer:

Step-by-step explanation:

B

Write an equation in slope-intercept form of the line that passes through the given points.

Answers

Answer:

y=3/2x+2

Step-by-step explanation:

The slope is 3/2

To find it find to perfect points or "pretty points" and rise then run, so the point (0,2) is a pretty point and (2/5) is a pretty point to get to this point you rise 3 and run 2, so 3/2.

The y-intercept is 2

To find the y-intercept all you need to do is find the point that passes through the y-axis, so (0,2) the y-intercept would be 2.

Guys!!!!!!! plz help me answer this! 40 points!!!!

Answers

Answer:

x = 6.

Step-by-step explanation:

There are actually two possible solutions, namely 6 and -1. However, due to the impossibility of the answer being -1 (a side cannot have negative length), the answer is 6.

Hope this helped!

3(x + 7)
plz heeelp
who ever helps gets 5 points

Answers

Answer:

3x + 21

Step-by-step explanation:

3(x+7)

3 * x + 3 * 7

3x + 21

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

Answer:

3x + 21

Step-by-step explanation:

3(x + 7)

3(x + 21)

3x + 21

Which is the graph of the solution set of −2x + 5y > 15? On a coordinate plane, a dashed straight line has a positive slope and goes through (0, 3) and (10, 7). Everything above and to the left of the line is shaded. On a coordinate plane, a dashed straight line has a negative slope and goes through (0, 3) and (5, 1). Everything below and to the left of the line is shaded. On a coordinate plane, a dashed straight line has a positive slope and goes through (0, 5) and (10, 9). Everything above and to the left of the line is shaded.

Answers

Answer:

The solution set of the system of inequalities is the region above the dashed line (y=-2x-2) and below the solid line (y=x+4).

Step-by-step explanation:

Answer: A

Step-by-step explanation:

You and your friends order Dominos pizza. Each pizza costs $5.25 and each drink costs $1.75. Write an equation to represent what the total cost would be.

Answers

Answer:

[tex]5.25x + 1.75y = b[/tex]

Step-by-step explanation:

⇒Lets solve!

⇒ First we must define our variables!

   x = number of pizzas

   y = number of drinks

  b = total costs

⇒ We already know the costs so lets construct the equation.

[tex]5.25x + 1.75y = b[/tex]

Woohoo! Brainliest Appreciated! Hope I helped!

$5.25p+$1.75d=c, where p=pizza, d=drink, and c=total cost.

what is the slope of the line that passes through the points (26, 7) and (-39, 12)

Answers

Answer:

m=  -1/13

Step-by-step explanation:

Tommy and Sam met up for lunch. When they were done, Tommy traveled 3 blocks east and Sam traveled 3 blocks west. How many blocks away from Tommy was Sam?​

Answers

Answer:

Tommy traveled 6 blocks away from Tommy.

Step-by-step explanation:

Which is the best description for the graph below?​

Answers

Answer:

The graph decreases everywhere.

Step-by-step explanation:

you use the bottom line first, so start from the bottom and go up to the 3. it's opposite to trick you. think of it as a 9 going to a 3.

In this hanger, the weight of the triangle is x and the weight of the square is y.

Write an equation using x and y to represent the hanger.

Answers

9514 1404 393

Answer:

x +3y = 4x +y

Step-by-step explanation:

Apparently, the "hanger" is in balance between its left side, which weighs x+3y, and it right side, which weighs 4x+y. We can represent this balance by ...

x +3y = 4x +y

In AEB,CD is parallel to AB. Complete each proportion please help!!!!!!!!!!!!

Answers

Answer:

see explanation

Step-by-step explanation:

Given a line CD parallel to a side of the triangle and intersecting the other 2 sides, then it divides those sides proportionally, thus

(a)

[tex]\frac{EC}{CA}[/tex] = [tex]\frac{ED}{DB}[/tex]

(b)

[tex]\frac{EC}{EA}[/tex] = [tex]\frac{ED}{EB}[/tex]

(c)

[tex]\frac{EB}{ED}[/tex] = [tex]\frac{EA}{EC}[/tex]

(d)

[tex]\frac{DB}{EB}[/tex] = [tex]\frac{CA}{EA\\}[/tex]

What is the nth term rule of the quadratic sequence below?
-5, -3,3, 13, 27, 45, 67, ...

Answers

Answer:

the pattern is +2, +6, +10, +14, +18 etc

so its in increment of 4

the rest is trivial

Step-by-step explanation:

Answer:

[tex]u_{n} = 2n^{2} -4n-3[/tex]

Step-by-step explanation:

a +b + c = - 5    First term in sequence

3a + b = 2   Difference between first two terms

2a = 4         Difference between  the difference of the first two terms and the second third terms (the difference between -5 and -3 is 2 the difference between -3 and 3 is 6; the difference between 6 and two is 4)

2a = 4 so a = 2; 3(2) + b = 2 → 6 + b = 2 so  b = -4; 2 - 4 + c = -5  → -2 + c = -5 so c = -3

I beg you please help me I will give you lots of credit please

Answers

Answer:

B

Step-by-step explanation:

The line going with the graph for 1 day meets in-between 1, and 2 dollars, so it is 1.50

The answer should be option B!

$10.50 for 3 pounds round to the nearest hundredth can u solve the other pens too .

Answers

Answer: 3: $3.50 for one pound

4: The value of X is 10

5: P has the value of 2

Step-by-step explanation:

There are 312 calories in six ounces of a certain ice cream. How many calories are there in three pounds?

Answers

1 lb = 16 oz
312/6 = 52 cal/oz
16(3) = 48 oz
52(48) = 2496 calories

Answer:

2496 calorise

Step-by-step explanation:

3 pounds = 3 x 16 = 48 ounces

312 cal = 6 ounces, so the unit rate is ( 312 ÷ 6 = 52) 52 cal per ounce

52 x 48 ounces = 2,496

Glad I could help

Winnie needs to spend $120 on two kinds of fancy cakes:
Chocolate Delight and Coffee Comfort. The Chocolate cake
sells at 12 dollars per slice and the Coffee cake sells at 10
dollars per slice.
If Winnie buys 5 slices of Chocolate cake, how many slices of
Coffee cake does she buy?
___slices

Answers

Answer:

Winnie needs to buy 6 slices of Coffee cake.

Step-by-step explanation:

12 * 5= $60 (chocolate cake)

120 - 60= 60

since we know the coffee cake costs $10(per slice) we do:

60/ $10= 6 slices of coffee cake.

I WILL GIVE BRAINLIEST Simplify by combining like terms.
-3x − 9 + 15x
A.12x + 9
B.18x − 9
C.12x − 9
D. 3x

SHOW YOUR WORK PLZSSSSSSSSS

Answers

Answer: The answer is 12x–9.

Step-by-step explanation: So to combine the like terms or simplify add –3x and 15x.


What is the quotient of (4x2 – 15x + 9) = (x – 3)?

4x - 3
4x + 3
3x - 4
3x + 4

Answers

Answer:

Step-by-step explanation:

(4x^2-15x+9) ÷ (x-3)

4x-3

5 exponent 4 = what the answer pls help

Answers

Answer:

625

Step-by-step explanation:

5*5*5*5

Answer:

625

Step-by-step explanation:

Because the exponent means you would multiply 5 by itself 5 times

so 5 times 5 = 25

25 times 5 and on and on.

what is the power of 10 the number 1.973 must be multiplied by to get 19,730,000

Answers

Answer: Is It 40? I cant really do this on paper sorry too many multiplication steps

Step-by-step explanation:

Sorry im just very confused but I tried my best

It would be the power of 7. 1.973 times 10 to the 7th is 19,730,000

(picture)
complete it ​

Answers

His estimated answer would be 120 and for number 4 it would be a) 300 b) 700 and c) 1500 hope this helped. Mark as brainliest?

Find the sum of the digits 10^15−1.

Answers

Answer:

149

Step-by-step explanation:

Answer:

135

Step-by-step explanation:

10^15 = 1 000 000 000 000 000

10^15 - 1 = 999 999 999 999 999

There are 15 nines

15*9 = 135

Factor-262 +65k - 2b

Answers

Answer:

-262 +65k =2b is not factorable with rational numbers

Step-by-step explanation:

which equation represents the line that passes through the points (6, -3) and (-4,-9)

A. y + 4= 3/5(x+9)
B.y + 4= 5/3(x+9)
C.y - 3=3/5(x+9)
D.y + 3=3/5(x-6)

Answers

Answer:

b is the answer

Step-by-step explanation:

2.What is the answer to this problem

Answers

Answer: It is not a Function

Step-by-step explanation: One input has two outputs.

it is not a function. yo.

What is the equation of the line that passes through the point (-2,5) and has a
slope of -4?

Answers

Answer:

i think -3

Step-by-step explanation:

5 = -4(-2)+b

5=8+b

5-8=8-8+b

-3=b

Find the unit rate. 2 1/4 mile in 1/4 hour

Answers

1/4 x 4 = 1
2 1/4 x 4 = 9

9 miles an hour

Can someone help plz? Jack and Jessica earned the same amount last week. Jack earned $18 per hour and had $41 taken from his check for taxes LaTeX: (18x-41)( 18 x − 41 ). Jessica earned $15 per hour and had $17 deducted from her pay. How many hours did each work in order to get paid the same amount?


Write the equation


Solve for the number of hours

Answers

Answer:

the answer is 8

Step-by-step explanation: so first what you want to do is you want to set up the equation 18x-41. then you want to do 15x because of the 15 per hour. then you minus 17. so your equation is 18x-41=15x-17 then the answer to that is 8 hours

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