Mathematics High School

At the start of the experiment substance is measured to be 70°C, and by the end of the experiment its temperature is measured as -60°C. How does the temperature change from the start to the end of the experiment? Represent a decrease in temperature with a negative number.

Answers

Answer 1

9514 1404 393

Answer:

  -130 °C

Step-by-step explanation:

The change is found by subtracting the start temperature from the finish temperature. It is ....

  -60 °C - 70 °C = -130 °C

Related Questions

ago
7
.
15
6
7
10. Which of the following could be the
perimeters of the three squares below?
A. 12 ft, 16 ft and 20 ft
B. 20 ft, 16 ft and 24 ft
C. 40 ft, 80 ft and 120 ft
D. 16 f1, 24 ft and 28 ft
Maneuvering the Middle LLC, 2017

Answers

Answer:

where are the squares?

Step-by-step explanation:

about 7/10of the surface of the earth is covered with water. express this as an equivalent fraction with 100 as the denominator. the fraction with 100 as the denominators are known as per cent. 50/100 means 50 per cent. so what percentage of the earth's surface is covered with water? what percentage is covered with the land?

Answers

Answer:

70%

Step-by-step explanation:

To find the quotient 3/4 / 1/8

Answers

Answer:

6 i think

Step-by-step explanation:

Answer:

24/4 or 6

Step-by-step explanation:

3/4 / 1/8

flip the 1/8 and the sign

3/4x8/1

3x8=24

4x1=4

What’s the answer to this?

Answers

Answer:

I would say the answer is c p=6n+18 because im thinking you are dealing with input-output

Step-by-step explanation:

I need help. This has to be in within a hour. Question 3, Will mark branliest if helped!

Answers

Your multiplying 2 on the 4,8,16,32 one then adding 1 on the 1,2,3 one which could determine the rate of change

Match the following equation to the correct situation.

s − s(21%) = s(79%)
A.
the price for a shirt that originally cost s after a 21% discount

B.
the amount that Anis owes on his car was 21% of s

C.
the amount that Katie paid for a pair of jeans with 21% tax on s

D.
the amount Doug gave to the local heart association was 21% of s

Answers

Answer: A.  the price for a shirt that originally cost s after a 21% discount

Step-by-step explanation:

The quotient of a number and 6 minus -1/3 is equal to the quotient of the number and 8. What is the number?

Answers

Answer:

x = 8

Step-by-step explanation:

Let the number = x

x/6 - 1/3 = x/8

-1/3 = x/8 - x/6

-1/3 = (6x-8x)/48

-1/3 = -2/48x

Divide both sides by -2/48

x = -1/3 ÷ -2/48

= -1/3 × -48/2

= 48/6

= 8

x = 8

The number = 8

what is the range of the function y=3x-2 if the domain is {0,1,2}

Answers

Answer: 2

Step-by-step explanation:

Easy points, what’s 9+10?

Answers

Answer:

19

Step-by-step explanation:

For the current reaction, 2NO2 ↔ N2O4, we have:

Kc = [tex]\frac{[N_{2} O_{4}]}{[NO_{2}]^{2} }[/tex]

Concentration of NO2 = 11.95
Concebtration of N2O4 = 6.05
Based on the current concentrations of NO2 and N2O4, what is Kc?

Answers

Answer:

[tex]\displaystyle K_c \approx 0.0424[/tex]

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Equilibrium

Equilibrium Constant KConcentrations - Denoted in [Brackets]Step-by-step explanation:

Step 1: Define

[RxN]   2NO₂ ⇆ N₂O₄

[Equilibrium Rate Law]   [tex]\displaystyle K_c = \frac{[N_2O_4]}{[NO_2]^2}[/tex]

NO₂ = 11.95 M

N₂O₄ = 6.05 M

Step 2: Find K

Substitute [ERL]:                    [tex]\displaystyle K_c = \frac{[6.05]}{[11.95]^2}[/tex]Exponents:                            [tex]\displaystyle K_c = \frac{[6.05]}{[142.803]}[/tex]Divide:                                   [tex]\displaystyle K_c = 0.042366[/tex]Round (Sig Figs):                  [tex]\displaystyle K_c \approx 0.0424[/tex]

This value of K tells us that the reactants are favored in the equilibrium reaction (K < 0.1).

The model represents the equation 3x - 2 < 4 what is the solution for this inequality

Answers

Answer:

x < 2

Step-by-step explanation:

3x - 2 < 4

   + 2 | + 2

------------------

    3x < 6

         ↓

(3x) / 3  <  6 / 3

         ↓

       x < 2

Question: one over k equals four over twenty
A. 4
B. 5
C. 6
D. 17

Answers

divide 4/20=5

5x4=20

The constant is 5

Answer:

B. 5

Step-by-step explanation:

1/k = 4/20 (Given)

1/k = 1/5 (Reduce)

1 = 1/5k (Multiply k on both sides)

5 = k (Divide 1/5 on both sides)

can some please helppp

Answers

Answer:

8

Step-by-step explanation:

8 because the ratio shown has everything in the x doubling as it goes on

What is 0.82 as a fraction in simplest form?
(I also need the work if not its ok!)

Answers

Answer:

f 41/50

Step-by-step explanation:

what is 4.193 to the nearest ten

Answers

The answer is 4.2

The 9 is above 5 so it raises the one

Directions: Find the indicated trigonometric ratio as a fraction in simplest form. 1. Sin L =

M

2. Tan N =

3. Cos L =

10

N

4. Sin N =

Answers

Answer:

[tex]\sin L = 0.60[/tex]

[tex]tan\ N = 1.33[/tex]

[tex]\cos L = 0.80[/tex]

[tex]\sin N = 0.80[/tex]

Step-by-step explanation:

Given

See attachment

From the attachment, we have:

[tex]MN = 6[/tex]

[tex]LN = 10[/tex]

First, we need to calculate length LM,

Using Pythagoras theorem:

[tex]LN^2 = MN^2 + LM^2[/tex]

[tex]10^2 = 6^2 + LM^2[/tex]

[tex]100 = 36 + LM^2[/tex]

Collect Like Terms

[tex]LM^2 = 100 - 36[/tex]

[tex]LM^2 = 64[/tex]

[tex]LM = 8[/tex]

Solving (a): [tex]\sin L[/tex]

[tex]\sin L = \frac{Opposite}{Hypotenuse}[/tex]

[tex]\sin L = \frac{MN}{LN}[/tex]

Substitute values for MN and LN

[tex]\sin L = \frac{6}{10}[/tex]

[tex]\sin L = 0.60[/tex]

Solving (b): [tex]tan\ N[/tex]

[tex]tan\ N = \frac{Opposite}{Adjacent}[/tex]

[tex]tan\ N = \frac{LM}{MN}[/tex]

Substitute values for LM and MN

[tex]tan\ N = \frac{8}{6}[/tex]

[tex]tan\ N = 1.33[/tex]

Solving (c): [tex]\cos L[/tex]

[tex]\cos L = \frac{Adjacent}{Hypotenuse}[/tex]

[tex]\cos L = \frac{LM}{LN}[/tex]

Substitute values for LN and LM

[tex]\cos L = \frac{8}{10}[/tex]

[tex]\cos L = 0.80[/tex]

Solving (d): [tex]\sin N[/tex]

[tex]\sin N = \frac{Opposite}{Hypotenuse}[/tex]

[tex]\sin N = \frac{LM}{LN}[/tex]

Substitute values for LM and LN

[tex]\sin N = \frac{8}{10}[/tex]

[tex]\sin N = 0.80[/tex]

Mary uses 212 cups of lemonade concentrate to make 20 servings of lemonade. How many servings can Mary make using 1 gallon of lemonade concentrate? Please include an explanation :)

Answers

Answer:

number of servings = 1.5

Step-by-step explanation:

1 gallon = 16 Cups

cups of lemonade concentrate : lemonade servings

212 cups : 20 servings

How many servings can Mary make using 1 gallon of lemonade concentrate

Let

x = number of servings

cups of lemonade concentrate : lemonade servings

16 cups : x servings

Equate both ratios to get x

212 : 20 = 16 : x

212 / 20 = 16 / x

Cross product

212 * x = 20 * 16

212x = 320

x = 320 / 212

= 1.5094339622641

Approximately 1.5 servings

number of servings = 1.5

Simplify 6° = 63

O A. 126

O B. 66

O C. 6-6

O D. 63

Answers

Answer:

i think its c 6-6 so good luck

Solve for x
PLS HURRY

Answers

the answer is B have a good day
b is the right answer

Ben is a farmer. He used 518 pounds of fertilizer on 16 acres.
How many pounds of fertilizer does Ben use per acre?

Answers

Answer:

32.375 or 32 with a remainder of 3

Step-by-step explanation:

yall i need just 1 more please i need to turn this in asap!help a girl out pls​

Answers

Answer:

a. 13.3

b. 16.3

Step-by-step explanation:

Hope this is right.

HELP MEEEE!
7th gradeeee

Answers

Answer:

0=0

Step-by-step explanation:

Add zero

0+2=2

2=2

Subtract 2 from both sides of the equation

2=2

2−2=2−2

Simplify

Combine like terms

2−2=2−2

0=2-2s

or

0=2s-2

0=0

Answer 0=0

Figure #2
2. What is x?
А 58
C 122
990
B
48
D
218
42

Answers

the answer is 58.

the inside of a triangle adds to 180, so by subtracting the inner corner numbers already known (80&42) you’re left with 58

Which number corresponds to 25%?

25
10.6
100
13.25
125
53
66.25
63.6
78

Answers

Answer:

25

Step-by-step explanation:

because 25 is %25 of 100

Answer:

25

Step-by-step explanation:

25% is 25 pieces out of 100 (cent). This means 25 corresponds to 25%. Another answer could be .25, but that is not there.

please hellp find x y and z

Answers

Answer:

angle x = 98

angle y = 82

angle z = 82

Step-by-step explanation:

angle y + 98 = 180; therefore, angle y = 82 degrees

angles z and y are alternate interior angles and are congruent (equal)

angle x is 98 degrees because angles x and y are same-side interior and their angles are supplementary (add up to 180 degrees)

In Gwinnett, the sales tax is 6%. You buy a watch that costs $45.50. What is the TOTAL cost including tax?

Answers

Answer:The answer is 48.23

Roger’s father knows that Dial It Up sells data plans at $16 for 2 gigabytes and Ring Ring sells data plans at $9 for 1 gigabyte. Use this information to calculate the ratio of the number of gigabytes to the price in dollars for Dial It Up and Ring Ring.

Answers

Answer:

dial it up

2:16

simplify

1:8

now multiply 8 by the number of gigs

2:16

3:24

and so on.....

ring ring

1:9

again multiply the cost by the number of gigs

2:18

3:27

and so on....

What is the slope of line P? And then what is the slope of line Q?

Answers

Slope of p = 3
Slope of q = -3
P= 3/1
Q= -3/1
Rise over run q is going to the left so it’s negative

hey, can somebody help me please and thank you. :)

Answers

B and d I hope this helps


Find the value of x in rectangle BCDE.
Find Value of x.

Answers

Answer:

34

Step-by-step explanation:

Answer:

x=34

Step-by-step explanation:

2x=x+34

-x   -x

x=34

TADA! :D

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