Mathematics Middle School

Please help me!
The temperature of a mixture was 12°Celsius at the start of the experiment. After four hours the temperature decreased 25°. What is the current temperature of the mixture?

Answers

Answer 1
12 - 25 is equal to -13.

Just think of it as 25 minus 12. This gives you 13. Then put a negative sign in front of it.

Related Questions

Look at the picture.

Answers

Answer:

178.5

Step-by-step explanation:

First, you take 8*10 and the subtract 7. Second, because it is a fraction, you divide it by 4*10-4. Basally,  its 8*10=80-7/4*10=40-4

In a class of 42 students, 18 students are in the Math Club, 5 students
are in both the Math Club and the Science Club, and 14 are in neither. How many
students are in the Science Club?

Answers

Answer:

15 maybe?

Step-by-step explanation:

42 - 14 = 28

18 - 5 = 13

28 - 13 = 15

subtract the 14 because it says it is in neither.

Subtract 5 from 18 because 18 are in math and only 5 are in both math and science.

Subtract 13 from the 28 because those 13 are in math and wont be in science also.

15 that first guy said

Simplify the expression 6(11+4−7h)

Answers

Answer:

−42h+90

Explanation:

6(11+4−7h)

=(6)(11+4+−7h)

=(6)(11)+(6)(4)+(6)(−7h)

=66+24−42h

=−42h+90

The answer is 90-42h

help asap plz i need specific answer

Answers

Answer: 6

rises by 6

it runs by 1

so 6/1= 6

I hope this is good enough:

it rises by 6 and runs by 1

so 6/1=6

Write or draw TWO (2) DIFFERENT fractions that are equivalent to 5/6

Answers

You could do 10/12 and you could do 15/18


Hope that helps!

Please answer 100% correct will mark; How many solutions does this equasion have?
9 - 9m = 7 + 9m
ANSWER CHOICES;
1. No solutions
2. One solution
3. Infinite solutions

Answers

Answer:

3

Step-by-step explanation:

the answer is infinite solutions

Help me pls
In Ocean City, MD a seagull is flying at 210¾ ft. above sea level and a dolphin is swimming at 329¼ ft. below sea level. What is the distance between the seagull and the dolphin?

Answers

540 because if you add 329 1/4 and 210 1/4 it’s 540. You add these together because you need to know the COMBINED distance between the dolphin and seagull.

Find the slope...........

Answers

First thing to do is find out the coordinates of two points on the graph (I will use the ones that have been marked by the red dots):

Point A: (3, -1)
Point B: (1, 2)

Then we will use the slope formula to work out the slope:

y₂ - y₁ / x₂ - x₁

Substitute in our points:

2 - (-1) / 1 - 3

Then we work out the expression (remember a negative and a negative make a positive!):

3 / -2

Then we check if we can simplify this fraction, which in this case we cannot.

Therefore the slope of that line would be:

3 / -2

(remember to write it as a fraction!)

Suppose a>0 and b<0. Identify the location of the point (-b,-a).

Answers

Answer: C

Step-by-step explanation:

Pa help po plssss
Letter B,C po plss

Answers

it’s b because you add 4 and there you go hope this
helps
It think is b but I’m not sure

help please!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

18. slope =1/2 y-int= -6

19. slope=2 y-int= 8

Step-by-step explanation:

The slope for number 18 would be 1/2 and the y intercept would be -6

The slope for 19 would be 2 and I cannot see the picture of the intercept correctly, but I’m assuming it is 6

Can i get some help please

Answers

2/11 is the answer for b

Solve 7(y + 2) – (4y – 10) = 44 – 2y + 5
A.y = -5
B.y = 5
C.y = -10

Answers

Answer:

y = 5

Step-by-step explanation:

7(y + 2) – (4y – 10) = 44 – 2y + 5

(7y+14) - (4y - 10) = 49 -2y

3y +24 = 49 -2y

5y +24 = 49

5y = 25

y = 5

Answer:

y=5

Step-by-step explanation:

7(y+2)-(4y-10) = 44-2y+5 distribute on the left and combine like terms on the right side of the equation

7y + 14 -4y +10 = 49 - 2y move every term with a variable on the left side with a change sign and the numbers on the right side

7y-4y+2y =49 -14 -10

5y = 25 divide both sides by 5

y5/5=25/5 so

y=5

Please help me. Which statements describe true relationships? Check all that apply.

Answers

Answer:

3 and 4

Step-by-step explanation:

proportionally it is the same shape and 2/1 is 2 so that's your scale factor

Answer: 1,3,4

Step-by-step explanation:

Please help me i dont understand
At the start of the month, the value of Susan’s checking account was $53. She gets paid $375 per week for 4 weeks and spends $172 on groceries for the month. How much does Susan have in her checking account at the end of the month?

Answers

$1,381

Because 375×4= 1,500
and 1,500-172= 1,328
lastly, 1,328 + 53= 1,381
Susan has $1381.

[ 53 + (375x4) ] - 172

Solve the inequality $-4x > -24.$ Give your answer in interval notation.

Answers

Answer:

(negative infinity, 6)

Step-by-step explanation:

To get this:

1. -4x > 24

Divide by -4

2. x < 6

When you divide by a negative you have to flip the inequality. Therefore, any number that is less than 6 is the answer.

The solution of the inequality will be;

⇒ x ∈ (- ∞, 6)

What is Inequality?

A relation by which we can compare two or more mathematical expression is called an inequality.

Given that;

The inequality is,

⇒ - $4x > - $24

Now,

Solve the inequality as;

The inequality is,

⇒ - $4x > - $24

Multiply by - 1, we get;

⇒ $4x <  $24

Divide by 4, we get;

⇒ x < 6

⇒ x ∈ (- ∞, 6)

Thus, The solution of the inequality will be;

⇒ x ∈ (- ∞, 6)

Learn more about the inequality visit:

https://brainly.com/question/25275758

#SPJ2

A skydiver descended at a constant rate after opening her parachute. Three minutes after she opened her parachute, she had descended 3,168 feet. Five minutes after she opened her parachute, she had descended a total of 5,280 feet.

At what rate was the skydiver descending, in feet per minute?
feet per minute

Answers

1,056 feet per minute
if you look at it as a graph, you’re basically finding the slope. equation for slope is
b= y2-y1
———- so b= 5280-3168 2112
x2-x1 —————— = ——— = 1056
5-3 2


answer: 1056 feet. hope this helps :)

Which number line plots the integers –2, 3, and 4?
A number line going from negative 5 to positive 5. Points are at negative 3, negative 2, and 4.
A number line going from negative 5 to positive 5. Points are at negative 4, negative 3, and 2.
A number line going from negative 5 to positive 5. Point are at 2, 3, 4.
A number line going from negative 5 to positive 5. Points are at negative 2, 3, 4.
Mark this and return

Answers

Answer:

A number line going from negative 5 to positive 5. Points are at -2, 3, 4.

Step-by-step explanation:

I did this my head

Answer:

D. A number line going from negative 5 to positive 5. Points are at negative 2, 3, and 4.

Step-by-step explanation:

It restates that the points are at -2, 3, and 4, like the question.

what are the slope and the y-intercept of the liner function that is represented by the equation y equals 9x - 2 the slope is -2 and the y-intercept is 9 the slope is 2 and the y-intercept is 9 the slope is 9 and the y-intercept is -2 the the slope is 9 and the y-intercept is 2​

Answers

Just a little help.

Hi there! I may not answer the other question But I certainly help you with what a slope is, see how a slope works are. Pick two points on the line and determine their coordinates. Hope this helps.

If you pick two points on a line and subtract left to right you can find your slope

Not sure if this is right.

Answers

Answer:

I think your right :)

Step-by-step explanation:

Yupp your right!!!!!!!!!!

2 questions- Please help

Answers

Dhajajqkkaqko1232sndcnj
For the second one the answer is. The line y = 4 is a horizontal line. A perpendicular line will be a vertical line the form
x = constant so the equation is

x = -2

Help plz ............

Answers

Answer:

i think it is B.

Step-by-step explanation:

Pretty sure the right answer would be B

Please help!!! Will try my best to give brainliest!!!!


Find the GCF of n 3t ^2 and nt 4.


n ^3t^ 6

n ^3t ^4

nt ^2

n^ 4t^ 6

Answers

Answer: nt ^ 2
:))))

Answer:

for this question is nt^2 or C

Step-by-step explanation:

I just need someone to take help me with the last set of measurements!!


You will need to measure five different people. Record your measurements on the table below. Using a tape measure or ruler, measure the length (in inches) of a person’s left foot and then measure the length (in inches) of that same person’s forearm (between their wrist and elbow). Refer to the diagrams below. You will have two measurements for each person.
(An easy way to measure the length of a foot is to have your subject stand on a piece of paper. Then, trace their foot and measure the outline once they move off the paper.)
To measure the forearm, measure inside the arm, between the wrist and the elbow

Answers

Answer:

Im not quite sure what your asking, but i'm doing this assignment rn. the mesurments i got and am using are

13 forearm  and  15 left foot

9 1/2 forearm and    9 left foot

8 forearm and      8 1/2 left foot

9 1/2    forearm and   10 1/2 left foot

10 forearm and 8 left foot

Step-by-step explanation:

hope this helps!

Assume that the cheetah travels an average of 40 mph to go from its resting place to a rock near a river. On the return trip to its resting place, the cheetah travels an average of 70 mph. If the cheetah traveled for 15 minutes, how many minutes did the return trip take to the nearest minute and second?
Set up the table as follows. Label the rows “To the River” and “From the River.” Label the columns “Distance,” “Rate,” and “Time (in Hours).” Let t represent the unknown quantity in the problem. Fill in the table.

Answers

Answer:

9.55 minutes

Step-by-step explanation:

x hours to go to the river

0.25-x hours to come back, since 15 minutes is 0.25 hr.

to the river 40 mph * x hours =40x miles

from the river 70 mph (0.25-x) hours=17.5-70x

those two are equal

40x=17.5-70x

110x=17.5

x=17.5/110=0.159 hours

9.55 minutes

Can somebody help me with this please

Answers

I think the answer to 1 is Friday
number 4 is monday, tuesday, and probably wednesday

What is the slope of the line?

Answers

Answer:

it is a horizontal line it has a zero slope

the slope is zero. when finding the slop do rise over run, since there is no rise and its horizontal it is a zero slope.

quick!!! :

whats 5 + 204 times pi

Answers

Answer:645.8849

Step-by-step explanation:

Answer: 645.8849

Step-by-step explanation:

does - 1/3 (like the negative is to the left of the fraction bar) = -1/3 (like the negative is to the left of the numerator)

Answers

Answer:

the first one is like minus 1/3 but the other one is like negative 1/3.

Step-by-step explanation:

blank - 1/3 and -1/3

Is that what you need to understand?  Hope it is and it helps :) sorry if it doesn't

What is 2and 2/3 divided by 4/5

Answers

Answer:

[tex]3\frac{1}{3}[/tex]

Step-by-step explanation:

In order to find the answer to this question you must change the mixed number into a improper fraction, use KCF, (Keep, Change, Flip) and solve.

[tex]2\frac{2}{3} \div\frac{4}{5}[/tex]

Convert into improper fraction:

[tex]2\frac{2}{3} =3\times2=6+2=8=\frac{8}{3}[/tex]

[tex]\frac{8}{3} \div\frac{4}{5}[/tex]

Use KCF:

[tex]\frac{8}{3} \times\frac{5}{4}[/tex]

Solve:

[tex]8\times5=40[/tex]

[tex]3\times4=12[/tex]

[tex]=\frac{40}{12}[/tex]

Reduce:

[tex]40\div4=10[/tex]

[tex]12\div4=3[/tex]

[tex]=\frac{10}{3}[/tex]

Convert into mixed number:

[tex]\frac{10}{3} =3\frac{1}{3}[/tex]

[tex]=3\frac{1}{3}[/tex]

Hope this helps.

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