Mathematics Middle School

Which is a description of rational numbers? a)Their decimal expansions can be infinitely repeating b) They are all numbers except zero c)They are always positive

Answers

Answer 1
I’m pretty sure it’s A

Because rational numbers include zeros and they aren’t always positive

Related Questions

A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents the amount of the isotope left then the equation for the situation is

Answers

Answer:

y=y0e^-0.0002t

Step-by-step explanation:

A certain isotope decays at a rate of 2%per 100 years. If t represent the time in years and y represent the amount of the isotope left then the equation for the situation is y=y0e^-0.0002t . In how many years will there be 86% of the isotope left?
.
Let x = initial amount
then our formula is
.86x = xe^(-0.0002t)
.
Notice, if we divide both sides by x, we eliminate our unknown:
.86 = e^(-0.0002t)
Solving for x, we take the ln of both sides:
ln(.86) = -0.0002t
ln(.86)/(-0.0002) = t
754.114 years = t

|n|=5 what is the value for n.

A -5or5
B 0 and 5
C -5 only
D 5 only

Answers

Answer:

A -5or5

Step-by-step explanation:

|n|=5

Absolute value means take the positive value of the number

|5|=5

|-5|=5

so positive 5 and -5

Olga decided to purchase a $22,000 MSRP vehicle at a 4.5% interest rate for 4
years. The dealership offered her a $2500 cash-back incentive, which she
accepted. Taking all these factors into consideration, what monthly payment
amount can she expect?

Answers

Answer:

479.375

Step-by-step explanation:

Answer:

$444.67

Step-by-step explanation:

A P E X

PLEASE HELP - Which of these graphs represents a nonlinear function ?

Answers

Figure 3

Step-by-step explanation:

figure 3 because the line is not straight

Use the law of sines to find the length of side c.
C
be
41.59
37
42°
А
С
CD
O A. 36.64
B. 54.94
C. 37
37 36

Answers

Without the calculator let's just estimate that .5/42 = 1.2% change in the angle; we reduce the length a=37 by 1.2% to get 37×.988=36.556.  That's probably good enough to choose A.

Let's do it the way they want.

[tex]\dfrac{\sin C}{c} = \dfrac{\sin A}{a}[/tex]

[tex]c = \dfrac{a \sin C}{\sin A} = \dfrac{37 \sin 41.5}{\sin 42} = 36.6400[/tex]

Answer: A

Estimate worked.  Sine is approximately linear when the range is small enough.    

You are making pudding. The recipe asks for 3/10 cup of sugar and you want to make 8/2 of the original recipe. How many cups of sugar will you need?

Answers

The answer to the question is 3

Answer:

6/5

Step-by-step explanation:

orginal recipe=8/2=4

Amt of sugar=3/10*4=12/10=6/5

Hope it helps, Pls mark as Brainliest!!!

Please help me I have to go to a class and I need this fast

Answers

Answer:

5) Mode = 63          6) Mode = 74        

   Range = 70             Median = 74

   Median = 63           Range = 57

   Mean =  58.75        Mean = 68.7

Step-by-step explanation:

Three people hiked the same 1 mile trail. The distance for each hiker is reperesented in the drawing. Show about where the 1 mile mark should be on each drawing.Explain​

Answers

Answer:

Okay, so for the first line, measure the distance between the start and the 0.5 miles. Then add that distance to the other side of the 0.5 miles and then put a mark.

For the second one measure the distance between the start line and the 0.25 miles and then add that distance to the other side three more times and then put a mark.

And for the last one, use the distance that you used for the second one and put it after the 0.75 mark.

Step-by-step explanation:

PLEASEEE HELP

Which table represents a linear function

Answers

The one on the bottom left represents a linear function

The volume of the sphere is 904.32 m. To the nearest meter, what is the radius of the sphere????? Use 3.14 for pi.

Answers

Answer:

6

Step-by-step explanation:

The formula for the volume of a sphere is [tex]\frac{4}{3} \pi r^3[/tex]. Plugging in the values that you are given, you get:

[tex]904.32=\frac{4}{3}\pi r^3[/tex]

Dividing both sides by pi or 3.14:

[tex]288=\frac{4}{3}r^3[/tex]

Dividing both sides by 4/3:

[tex]216=r^3[/tex]

Taking the cube root of both sides:

[tex]r=6[/tex]

Hope this helps!

Find the volume of the following solid figure. Use = 3.14.
V = 4/31tr3. A sphere has a radius of 4.5 inches.
Volume (to the nearest tenth) =
cubic inches.
381.5
56.5
84.8

Answers

381.5 because it is......

I NEED HELPPPPP!!!! PLZZZ

Answers

Answer:

13.5

Step-by-step explanation:

PLEASE HELP IM DUMB AND I NED THIS ASAP

Answers

Width (7.8) x length (7.8) x width (7.8) = 474.552

Two cars are 270 miles apart and traveling toward each other on the same road. They meet in 3 hours. One car is traveling 6 mph faster than the other. What is the speed of each car?

Answers

Answer:

42

Step-by-step explanation:

3(x+x+6)=270

3(2x+6)=270

6x+18=270

6x=252

x=42

PLS HELP....I WILL GIVE YOU BRAINLIEST!!!!!!!!!!
Express as a percent:
1/6:
1/3:
2/3:
5/6:

Answers

Look at the attached picture

Hope it will help you

Good luck on your assignment

what is the center?
the circle passes through the point (-7,-7). what is the radius?​

Answers

We have been given image of circle that passes through point [tex](-7,-7)[/tex]. We are asked to find the radius of the circle.

First of all, we will find the center of the circle.

We can see that center of circle is at point [tex](-2,-1)[/tex].

Now we will use equation of circle to find radius.

[tex](x-h)^2+(y-k)^2=r^2[/tex], where, point (h,k) represents center of circle and r represents radius of circle.

Now we will substitute the coordinates of point [tex](-7,-7)[/tex] and coordinates of center [tex](-2,-1)[/tex] and solve for r as:

[tex](-7+2)^2+(-7+1)^2=r^2[/tex]

[tex](-5)^2+(-6)^2=r^2[/tex]

[tex]25+36=r^2[/tex]

[tex]61=r^2[/tex]

Switch sides:

[tex]r^2=61[/tex]

Now we will take positive square root on both sides:

[tex]\sqrt{r^2}=\sqrt{61}[/tex]

[tex]r=\sqrt{61}[/tex]

Therefore, radius of circle will be [tex]\sqrt{61}[/tex] and center is at point [tex](-2,-1)[/tex].

Find the length of DF

Answers

Answer:

7x-58

just add all the terms

3x-28+3x-30+x
7x-58 =33
7x=91
X=13
Soooo df= 6x-58
6*13-58=20
20 is the correct answer

If a data value in a normal distribution has a negative z-score, which of the following must be true?

Answers

WHERE ARE THE FOLLOWING?

Answer:

C. The data value must be less than the mean

Step-by-step explanation:

Took the quiz on edge:)

Please help ASAP will mark brainliest

Answers

the points are (1,8) :)

A car travels m miles per hour. Which variable expression represents the number of miles traveled in 8 hours?

A. m/8
b. m-8
c. 8m
d. 8÷m

Answers

Answer:A Idk if this is right!

A Bowling ball is rolled down the alley with the constant velocity of 1.6 m/sec at an angle of 85° to the starting line, the position of the person throwing a bowling ball can be represented by the point (0,0). where is the ball after six seconds?

Answers

We have been given that a Bowling ball is rolled down the alley with the constant velocity of 1.6 m/sec at an angle of 85° to the starting line, the position of the person throwing a bowling ball can be represented by the point (0,0).

We are asked to find the position of ball after 6 seconds.

We will use horizontal position and vertical position formula to solve our given problem.

Horizontal position is given by formula: [tex]x=v\cdot \text{cos}(\theta)\cdot t[/tex] and vertical position is given by formula: [tex]y=v\cdot \text{sin}(\theta)\cdot t[/tex],where,

v = Velocity,

t = Time,

[tex]\theta[/tex] = Angle to the starting line.

For our given problem [tex]v=1.6[/tex], [tex]t=6[/tex] and [tex]\theta=85^{\circ}[/tex].

[tex]x=1.8\cdot \text{cos}(85^{\circ})\cdot 6[/tex]

[tex]x=10.8 \cdot 0.087155742748[/tex]

[tex]x=0.9412820216784\approx 0.94[/tex]

[tex]y=1.8\cdot \text{sin}(85^{\circ})\cdot 6[/tex]

[tex]y=10.8\cdot 0.996194698092[/tex]

[tex]y=10.7589027\approx 10.76[/tex]

Therefore, the position of ball after 6 seconds would be [tex](0.94,10.76)[/tex].

Answer:

(0.8,9.6)

Step-by-step explanation:

x=1.6*cos85* 6=0.8

y=1.6*sin85 *6=9.6

Math question down below

Answers

Answer:

2 3/8

Step-by-step explanation:

5 1/8 - 2 3/4

= 5 1/8 - 2 6/8

= 4 9/8 - 2 6/8

= 2 3/8

Evaluate 3a + b to the second power if a=2 and b=3
PS : can you help me with 1, 2 and 3 ?!

Answers

Answer:

1. 3

2. 3

3. 15

Step-by-step explanation:

Someone help me with this pls

Answers

Answer: You Would have To know How Far it will go In the next 60 min. (c

Step-by-step explanation:

Answer:The answers are down there.

Step-by-step explanation:

A) The speed of the train on the last section is  20miles/ 30 minutes  which 0.66 miles per minute.

B) It traveled the fastest from 50 to 60 minutes or 30 miles to 60 miles.

C) The train will travel 60 miles in 60 minutes.

D)The train stopped for  20 minutes during the journey.

Find the volume of the cone whoever answers first gets brainiest!

Answers

Answer:

157.08

pi x radius x radius x height/3

Step-by-step explanation:

Answer:

V≈157.08

Step-by-step explanation:

I used the formula for a cone:

V=πr2h/3 (h/3 as in a fraction)


The number of points Emerson scored in 5 basketball games is 10, 8, 9, 8,
and 30. Why might it be misleading to Emerson to say that she averages 13
points per game? *

Answers

Answer:

because she usually gets lower scores but her avarge is 13 because she make 30 in one game witch is an outlire

Step-by-step explanation:

if im wrong im sorry if not pls brainlyest

Simplify.

8(12 - p)

20 - (8+p)
96 - 8p
96 - p
96p

Answers

So the right answer is of option C

Look at the attached picture

Hope it will help u ..

Wanda did 12 push-ups on Saturday, 24 push-ups on Sunday, 48 push-ups on Monday, and
96 push-ups on Tuesday. What kind of sequence is this?

Answers

Answer:

2x

Step-by-step explanation:

Each number is mutiplied by 2

Answer: it doubles

Step-by-step explanation: 12+12= 24, 24+24= 48, 48+48=96

Describe the pattern of the number sequence 1, 9, 17, 25, 33, .... by using algebraic expressions

Answers

Answer:

8n + 1, where n is a whole number greater than or equal to 0.

Step-by-step explanation:

Every number on this list is one more than a multiple of 8, so if n is a whole number great than or equal to 0, the expression 8n describes every multiple of 8, and 8n + 1 describes every number one more than a multiple of 8.

The sequence is an arithmetic sequence.

The pattern is 1 + (n - 1)8.

What is an arithmetic sequence?

It is a sequence where the difference between each consecutive term is the same.

Example:

2, 4, 6, 8 is an arithmetic sequence.

We have,

1, 9, 17, 25, 33,....

This is an arithmetic sequence.

The first term is 1.

a = 1

The common difference is 8.

d = 8

i.e

9 - 1 = 8

17 - 9 = 8

25 - 17 = 8

The nth term of an arithmetic sequence.

= a + (n -1)d

= 1 + (n - 1)8

Thus,

The pattern of the sequence is 1 + (n - 1)8.

Where n is the term of the number.

Learn more about arithmetic sequence here:

https://brainly.com/question/10396151

#SPJ2

Look at the data points on the graph:
Is this relation a function?

Answers

I am pretty sure that it is a function. Every input has one output. Here is a memory device that my teacher gave us. Hopefully it helps!!
Other Questions
Donovan company incurred the following costs while producing 2000 units: Direct Materials, $15 per unit; direct labor, $5 per unit; variable manufacturing overhead, $12 per unit; variable selling and administrative costs, $14, per unit; total fixed overhead costs, $20,000; total fixed selling and administrative costs, $10,000. There are no beginning inventories. What is the unit productive cost using absorption costing? a. $32 per unit b. $42 per unit c. $52 per unit d. $61 per unit What is the unit product cost using variable costing? a. $32 per unit b. $44 per unit c. $46 per unit d. $61 per unit What is the operating income using absorption costing if 1800 units are sold for $100 each? a. $104,400 b. $96,000 c. $79,200 d. $69,200 What is the operating income using variable costing if 1900 units are sold for $100 each? a. $57,400 b. $72,600 c. $80,200 d. $102,600 *Formulas or explanations with each part of the problem. when would you need to summarize and article Which of the following are the major "reservoirs" of carbon in the environment?Select one or more:A. the SunB. natural habitatsC. the Earth's interiorD. the atmosphereE. sedimentsE the oceansG. the human body Which is an example of an effective study skill? Kevin, Rajiv, and Yakov are hunters who live next to a recreational wildlife game area that is open to hunting; in other words, anyone is free to use the recreational wildlife game area for hunting. Assume that these men are the only three hunters who hunt in this recreational wildlife game area and that the recreational wildlife game area is large enough for all three hunters to hunt intensively at the same time.Each year, the hunters choose independently how often to hunt; specifically, they choose whether to hunt intensively (that is, to set several traps and hunt long hours, which hurts the sustainability of the recreational wildlife game area if enough people do it) or to hunt nonintensively (which does not hurt the sustainability of the recreational wildlife game area). None of them has the ability to control how much the others hunt, and each hunter cares only about his own profitability and not the state of the recreational wildlife game area.Assume that as long as no more than one hunter hunts intensively, there are enough animals to restock the recreational wildlife game area. However, if two or more hunt intensively, the recreational wildlife game area will become useless in the future. Of course, hunting intensively earns a hunter more money and greater profit because he can sell more animals.The recreational wildlife game area is an example of _____________ because the animals in the recreational wildlife game area are ________ and ___________. Read the following passage:In his 2005 autobiography, Brison explains that he"eventually longed for the slower pace of the Midwest"after he left Ohio.Which method is used to integrate the quotation into this passage?A. The name of the source of the quotation appears at theend of the quotation.B. The quotation is presented as part of the writing and doesnot stand on its own.O c. The quotation is paraphrased in the words of the writer ofthe passage.O D. The name of the author of the quotation is inserted at theend of the quotation. The marcus family goes out to eat 4 nights during vacation. There are two adults and two children in their familyThe first night they go out to a buffet, the cost is 24.99 per adult and 12.99 per child. Plus 8% sales tax, how much did dinner cost? Why did American policy makers promote expansionism in the late 1800s? Determine which ordered pairs are also in the relation where the rise is -2, the run is3, and (6,2) lies on the line.a) (-9, -12) and (-6, 2)b) (-3, 4) and (3,8)c) (0,9) and (-2, 12)d) (9,0) and (12, -2) Which conjugated verb best completes this sentence?Yolanda y Patricia por correo electrnico.A. les comunicanB. te comunicasC. se comunicaD. se comunican 15)Which expression is a PRODUCT?A)8(6+ 3)B) 8(6 + 3)5(2) + 2(6 x 3)D)5(2 + 3) - 4(8 + 1) a. What is the mass in grams of 4.2 mols of FeO2? HELPWhat is the longest line segment that can be drawn in a right rectangular prism that is 15cm long, 8 cm wide, and 7 cm talk What is the organizational structure of this excerpt?A. cause and effectB. compare and contrastC. central ideas and supporting detailsD. problem and resolution Find the value of x in the figure. Enter the number ONLY! Solve for the missing side HURRY ITS FOR A TEST when 3x - 2x +7 is subtracted from 5x - 4x+ 10 , what's the difference? a. 5x-7x+2x+3b.5x + x + 2x - 3c.5x - 7x + 2x + 17d. 5x + x + 2x + 17 solution of 4y - 2x < 8a. (0,2)b. (-4,0)c. (1,2)d. (10,7) What is the y-coordinate of the solution of the system of equations? {y=3x26 2xy=19 Enter your answer in the box. What advantage does an encyclopedia have over a periodical as a source for research?An encyclopedia is more likely to be updated frequently.An encyclopedia is a better source for details on a topic.An encyclopedia is more likely to focus on a narrower topic.An encyclopedia is a better source for background information.