Mathematics Middle School

Plz :<
In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does this change take place? *
10 points

A -8 hours
B. 1/8 hour
C. 1 hour
D. 8 hours

Answers

Answer 1

Answer:

D 8 hours

Step-by-step explanation:

it has to be positive and it is obviously more than 1 hour so it has to be 8 hours by process of elimination.

Related Questions

Chance rode his bike for x minutes, and Jaden rode his bike for 3/8 more than that.

Part A
Write and equation using fractions that relates the number of minutes Chance rode with y, the number of minutes that Jaden rode his bike. (write your answer as a fraction)
y= __ x

Part B
Write an equation, using decimals, that relates the number minutes chance rode with y, the number of minutes that Jaden rode his bike.
y=___ x

Answers

Answer:

Part A = 6/16

Part B .15

Step-by-step explanation:

part a would be 16/6 and part b would be .15

Write 240 as an exponent with a base of:

2^2
2^5
2^8

Please answer all 3! Will Award brainliest!

Answers

Answer:

2^2=4

2^5=64

2^8=512

Step-by-step explanation:

2x2=4

2x2=4, 4x2=8, 8x2=16, 16x2=32, 32x2=64

2x2=4, 4x2=8, 8x2=16, 16x2=32, 32x2=64, 64x2=128, 128x2=256, 256x2=512

1.4
2.10
3.64
It is the correct answer

I NEED HELP THIS IS DUE IN AN HOUR!!!!!

Answers

B = 1
W = 28
unless theres more info
B = 1

W = 28


Explanation:

The dog knows it should not be traveling at this time, but follows his owner. Would this be an example of an internal or external conflict? Why?

Answers

Answer:

internal conflict

Step-by-step explanation:

bc the dog cares about his owner but he also knows he shouldn't b traveling rn so its a problem within him. Hope this helps

Internal conflict because the dog wants to be with his owner there for follows him

hi again answer these questions lspslsplsplspsldpwkqmeij3k1nh32jn3213123421

Answers

Answer:

i don't even know the answer to this stuff lol

Find the value of x in each pair of similar figures. Use proportions to solve.

Answers

Answer:

5•3=x/15

Explanation:

What is the circumference of the circle defined by x^2+6x +y^2-12y-4=0.

Answers

Answer:

44.0

Step-by-step explanation:

Mark me as brainliest

The number of students who attended Lincoln Middle School last year was 860. This year, the attendance has increased to 1032 students. What percent of last year’s student population is attending Lincoln Middle School this year?

Answers

Answer:

120%

Step-by-step explanation:

I just got it right !!

Answer: 120%

Step-by-step explanation:  n =120%

Think about how you can use absolute value notation to express the distance between two points on a coordinate graph. For each pair of points below, find the distance between the given points and express your work using absolute value symbols. Show your work.

(4, 9) and ( –5, 9)
(7, –1) and (7, –4)
(0, 9) and (0, –7)
(4, –8) and (–10, –8)

Answers

Answer:

(4, 9) and (-10, -8)

Step-by-step explanation:

PLEASE ANSWER! I WILL GIVE 80+ POINTS, BRAINLIEST, A THANKS, 5 STARS, AND A FOLLOW IF YOU ANSWER ALL OF THESE (P.S they all have to do with direct variation):

#1) If y varies directly with x, write an equation for the direct variation. Then find each value. If y = –4 when x = 10, find y when x = 5

#2) If y varies directly with x, write an equation for the direct variation. Then find each value. If y = 12 when x = –15, find y when x = 2

#3) If y varies directly with x, write an equation for the direct variation. Then find each value. Find x when y = 18, if y = 9 when x = 8.

Answers

Answer:

Step-by-step explanation:

1: -2?

2: 17?

3: 16?

You have 2 different savings accounts. For Account​ A, the simple interest earned after 3 months is $0.90. For Account​ B, the simple interest earned after 18 months is $22.50. If the interest rate is 3.6%for Account A and 2.5% for Account​ B, how much is the principal in each​ account? Which account earned you the most interest the first​ month? Explain your answer.

Account A has a principal of ​$BLANK. (Round to the nearest dollar as​ needed.)

Answers

You have to round it to 21 which is the answer

Which equation can be used to find 75 percent of 200?
(A) StartFraction 75 times 1 Over 200 times 1 EndFraction = StartFraction 75 Over 200 EndFraction
(B) StartFraction 100 times 26.7 Over 75 times 2.67 EndFraction = StartFraction 267 Over 200.25 EndFraction
(C) StartFraction 200 times 2 Over 100 times 2 EndFraction = StartFraction 400 Over 200 EndFraction
(D) StartFraction 75 times 2 Over 100 times 2 EndFraction = StartFraction 150 Over 200 EndFraction

Answers

the answer is x= 75*2
x= 3/4*200
and the equations are x= 75/100 *200
= 75*2
or 3/4 * 200
The answer is x=75*2

The sum of three decimals.
23.56 2.56 2.5892.

Step by step I need to show my work.

Answers

Answer:

28.7092

Step-by-step explanation:

2.5892 + 23.5600 = 26.1492

26.1492 = 28.7092

Answer:

28.7092

Step-by-step explanation:

Line up the decimals,

23.56

 2.56

+2.5892

________

Add normally like you would from right to leftbring the decimal straight down and you will get the answer

Amil took $65.00 to go shopping, and he bought 2 pair of jeans for $27.00 each. How much change will he have? Choose the expression that is a correct translation of the problem.
(2 x 27) - 65
65 – (2 x 27)
65 – (2 + 27)
65 – 2 + 27

Answers

Answer:

B) 65 – (2 x 27)

Step-by-step explanation:

65 is you total, 2 is the amount of jeans and 27 is the individual price of the jeans.

Since you want to know how much is left over, you subtract how much you spent which would be, in this case, the jeans.

You bought 2 jeans, each for 27 dollars so you multiply the two to see how much for both jeans.

Subtract that from the total.

Hope this helps! (^-^)

Answer:

65-(2 x27)

Step-by-step explanation:

You already know that Amil has 65$ so that's the first part.

And then it tells you that he bought 2 pairs of jeans and the price.

So if u multiply how many jeans he got times the price that tells you how much it cost. So it cost 54$

Last but not least you subtract 54$(the price) from 65$(how much money he had) to get the amount of change left over.

Please give Brainliest. And hope this helps :)

-3x > 12. Help thanks

Answers

Answer:

x<-4 i hope i help plz mark me brailist

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[tex] - 3x > 12[/tex]

Add sides 3x

[tex] + 3x - 3x > + 3x + 12[/tex]

[tex]0 > 3x + 12[/tex]

[tex]3x + 12 < 0[/tex]

Subtract sides 12

[tex]3x + 12 - 12 < 0- 12[/tex]

[tex]3x < - 12[/tex]

Divide sides by 3

[tex] \frac{3x}{3} < \frac{ - 12}{3} \\ [/tex]

[tex]x < - 4[/tex]

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GIVING BRAINLIEST! I have a plagiarism checker-

Please answer the following essay question:

Explain why we need to have a common denominator in order to add or subtract fractions.

Answer in paragraph form using complete sentences and include any calculations, graphs, and labeled diagrams as appropriate.

Answers

Answer

If you didn't it there wouldn't be an easy method to do the problem.Having the same denominator is the easiest method and is pretty basic.If you didn't have a common denominator such as:5/8 + 7/6, it would be virtually impossible to solve.

Step-by-step explanation:

How many 2/5’s are in 5

Answers

Any number divided into itself is equal to one

Answer:

12.5, 2/5 are in 5

Step-by-step explanation:

2/5*12.5=5

Have a beautiful day and stay safe!

Need help for 2 and 3realy don't understand 3

Answers

You got 2 right I think you add 8 to 16 which makes 24 make them whole numbers and get 12 as an answer so r=12

Answer:

p=6 and r=48

Step-by-step explanation:

19=4p-5

19+5=4p

24=4p

24/4=p

6=p

check

19=4p-5

19=4x6-5

19=24-5

19=19

3)r/2-8=16

r/2=16+8

r/2=24

r=24x2

r=48

check

r/2-8=16

48/2-8=16

24-8=16

16=16

Answer the best you can please :)

Answers

Answer:

586

Step-by-step explanation:

Answer:

4,102/7 in decimal notation: five hundred eighty-six

Ryan is moving, and he is packing a box with plates and bowls. The box can only hold 12 pounds. Each plate weighs 1.2 pounds, and Ryan has already packed 4 plates in the box. Each bowl weighs 0.9 pounds. Which inequality could be used to find b, the number of bowls that can be added to the box? WILL GIVE BRAINLIEST
A. 4(1.2 + 0.9b) 12
C. 4(1.2 + 0.9b) > 12
D. 4(1.2) + 0.9b < 12

Answers

Answer: The answer is A. Hope this helps!

Who else hate khan academy?

Answers

Answer:

samme

Step-by-step explanation:

Answer:

Me i tho im forced to watch it for school

Step-by-step explanation:

PLEASE HELP ME ;-; ILL MARK AS BRIANLIEST IF ITS RIGHT
The event coordinator asks you to determine how many students participated in the
track-and-field day. The total number of students in seventh and eighth grade
combined is 584; 5/8 of them are seventh graders and 3/8 of them are eighth-graders. If 4/8 of the seventh graders participated in track-and-field day and 7/8 of the eighth graders participated, about how many total students participated? Describe the process you used to find your answer.

Answers

Answer:

374.125 students. Not sure if you're supposed to round up or down considering you can't have a fraction of a person, but I would round down.

Step-by-step explanation:

(5/8) (584) = 365 seventh graders in total

(3/8) (584) = 219 eighth graders in total

(4/8) (365) = 182.5 seventh graders who participated in track-and-field day

(7/8) (219) = 191.625 eighth graders who participated in track-and-field day

182.5 + 191.625 = 374.125 students in total who participated

Answer:

First, I took 5/8 out of 584 for the seventh graders which came out to 365 seventh graders. Then, I did the same thing with 3/8 and it came out to 219 eighth graders. Then I took out 4/5 out of 365 which resulted as 292. Then I did the same thing for 7/8 and the results came out as 191. So in total 483 students participated in track-and-field day.

Step-by-step explanation:

The following linear equation is shown: y = 2% + 5
Using this equation, what is the value of the missing space on the table

Oy=8
Oy=9
O y = 18
I don't know

Answers

Answer:

y=8

Step-by-step explanation:

Answer:

13

Step-by-step explanation:

Between 9 and 11 the gap is 2. Add 2 to 11 and you get 13

5(3m - 6) when simplify

Answers

Answer:

15m-30

have a nice day

The expression in simplified form, obtained from the distributive property of multiplication over addition is; 15·m - 30

What is the distributive property?

The distributive property of multiplication over addition states that for numbers, a, b, and c, we get;

a·(b + c) = a·b + a·c

The expression, 5·(3·m - 6) can be simplified by applying the distributive property of multiplication as follows;

5·(3·m - 6) = 5 × 3·m + 5 × (-6) = 15·m - 30

The simplified form of the expression is therefore; 15·m - 30

Learn more on the distributive property here: https://brainly.com/question/2807928

#SPJ6

What is a scatter plot?
A. A table of measurement data used to construct a graph
B.A display of points that shows the relationship between two sets of data
C.A graph that has several different lines scattered on the coordinate plane
D.A graph that is nonlinear

Answers

Answer:

D

Step-by-step explanation:

A graph that is nonlinear

What is the next number in this sequence? 3, 7, 11, 15….
17
21
19
22

Answers

Answer:

19

Step-by-step explanation:

Please give brainliest.

Answer: 19

Step-by-step explanation:

hope this works

evaluate the expression | 10 | =

Answers

Answer:

10

you go positive for negative numbers and stay positive for positive numbers

Answer:

before i answer this, do you still need help with this question???

Step-by-step explanation:

Find the value of x in each case.

Answers

Answer:

I think its 80 for both. .,.

Hola,

Goodluck! Z:

The answer would be 80

Help help help help help help help

Answers

Answer:

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write an integer for profit of $9

Answers

+9 is an integer profit
+9 which is positive 9!
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