Mathematics High School

Mr. Lin writes the expressions
-20 - 8 and 8 - (-20) on the board.
He asks his class which result is greater. How can his class decide without finding
the value of each difference?

Answers

Answer 1

Answer:

Just see that the first expression has all negative, meaning the total will be a negative, but the second expression the subtraction sign and the negative sign are together, there's a rule when two negative sign's are together/next to each other, they turn into a addition sign, so it basically 8 + 20 for the second expression, so 8-(-20) has a higher result

Step-by-step explanation:

There's no work needed to be done :P

Answer 2

The first one will be all negative and the second one will be all positive

Related Questions

im really bad in math so could anybody help me

Answers

Answer:

B , D , A ,C

Step-by-step explanation:

PEMDAS

Answer:

= 5² = 25

= 36 ÷ 6 = 6

= 6 × 3 = 18

= 18 + 25 = 43

Step-by-step explanation:

The order of operations is PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction From Left to Right.

First is Exponents.

5² = 5×5 = 25

From left to right, division comes first.

36 ÷ 6 = 6

Then multiplication.

6 × 3 = 18

Lastly, addition.

18 + 25 = 43

Hope that helps.

I NEED HELP ASAP!!!!
I WILL GIVE A BRAINELEST

Answers

im not sure if this is correct but x=4 double roots

Answer:

x=4

Step-by-step explanation:

3x −4 = 11 what is the answer

Answers

Answer:

x=5

Step-by-step explanation:

Answer:

the answer is x=5                              

If airpane flies at an average speed of 7.5miles per minutes in 1 1/2 hours it will have flown

Answers

it will have flown 675 miles in 1 1/2 hours

mark me brainliest if the answer is correct, thank you in advance :)

Answer:

The plane will have traveled 675 miles in 1 1/2 hours.

Step-by-step explanation:

Ok so there are 90 minutes in 1.5 hours and since it travels 7.5 miles per minute to get the total: 7.5*90=675.

Which table could be a partial set of values for a linear function? x y 0 1 1 2 2 5 3 10 x y 0 9 1 8 2 5 3 0 x y 0 0 1 2 2 8 3 18 x y 0 3 1 5 2 7 3 9

Answers

Answer:

x y

0 3

1 5

2 7

3 9

5/8x24 how can I show my work solving dat

Answers

Answer:

Check the image below

Step-by-step explanation:

Original Tv cost 700 Current Tv cost 500 find the percent of decrease

Answers

Answer:

200 is the decrease ............

Answer:

the percent of decrease=28.57%

Step-by-step explanation:

(Old Price - New Price)/Old Price (and multiply that number by 100)

[(700-500)/700]*100=28.57%  

Type the correct answer in each box.
If cos -105º = -0.26 and csc -105º = -1.03, then cos 105º = ? and csc 105º = ?

Answers

Answer:

[tex]\cos(105^\circ)\approx-0.26\text{ and } \csc(105^\circ)\approx1.03[/tex]

Step-by-step explanation:

We are given that:

[tex]\cos(-105^\circ)\approx-0.26\text{ and } \csc(-105^\circ)\approx-1.03[/tex]

And we want to find:

[tex]\cos(105^\circ)\text{ and } \csc(105^\circ)[/tex]

Part A)

Remember that cosine (and secant) is an even function. By definition, this means that:

[tex]\cos(\theta^\circ)=\cos(-\theta^\circ)[/tex]

Therefore, since we know that cos(-105°) is about -0.26, it follows from the definition that:

[tex]\cos(-105^\circ)=\cos(105^\circ)\approx-0.26[/tex]

Part B)

Remember that cosecant (and sine) is an odd function. By definition, this means that:

[tex]\csc(-\theta^\circ)=-\csc(\theta^\circ)[/tex]

We know that csc(-105°) is about -1.03.

By the above definition, we can rewrite csc(105°) as csc(-(-105°)) or -csc(-105°).

Hence, it follows that:

[tex]\csc(105^\circ)=-\csc(-105^\circ)=-(-1.03)=1.03[/tex]

THIS ONE TOOOO AND MORE COMING

Answers

Answer:

uh

Step-by-step explanation:

Answer:

[tex] \widehat {DC} [/tex]

Step-by-step explanation:

Since, DC is the diameter of the circle.

Therefore,

[tex]m\widehat{DC} = 180\degree [/tex]

Edgar is scuba diving 50 feet below the water. He is swimming to the surface at a rate of 3 feet per second. Write an equation to represent his depth, d, after s seconds.
Fill in the blank
d = __ s + __
(also to understand better we are doing the equation y = __ x + __ )

Answers

Answer:

d= 3s+50

Step-by-step explanation:

Hope this helped you!! Give brainliest..

Find all values of x such that 6=35/x -49/x^2

Answers

I have this same question can U let me know when someone answers
Answer:

X1= 7/3, X2= 7/2.

A 24 oz. bottle of pop costs $2.25. What is the price per ounce? How did you get that answer?

Answers

the answer is 10cents i think.. i used decision

Answer:10.07

Step-by-step explanation: I got my answer by dividing 24 and 2.25. First, I set up my equation, 24 / 2.25. Then, i multiply 2.25 by 10, which was 22.5. Then i subtracted, which was 1.5 then i bring down my 0. 2.25 doesnt go into 1.50 so I add a 0. then i bring down a 0.

A scale on a blueprint drawing of a house shows that 6 centimeters represents 3 meters.
What number of centimeters on the blueprint represents an actual distance of 27 meters?

Answers

Answer:

Step-by-step explanation:

Solve the following equation: -3 = 1 3/5 + m.

-2 3/5
-4 3/5
-4 2/5
-1 2/5

Answers

Answer:

-4 3/5

Step-by-step explanation:

I subtracted 1 3/5 from -3 and got -4 3/5. I also added 1 3/5 + -4 3/5 to check my work and it is correct.

question no. 3 the square root pls help guys pls ​

Answers

the answer to number 3 is 198

An acid is prepared by mixing 400 mL of water and 100 mL of pure sulfuric acid. What is the
percentage by volume composition of sulfuric acid?
A. 15 %
B. 20%
C.25%
D.30%​

Answers

C. 25
——-
Divide 400/100=4
——-
Than divide 4/100
—-

geometry help please :)

Answers

Answer:

Medium to Line AC

Altitude to Line AC

Bisector of Angle B

Perpendicular bisector of Line AC

Step-by-step explanation:

We can tell that the Medium here is from line AC to angle B. The line is connecting the angle to the middle of the line, making it the medium and altitude. It is also a bisector of angle B because it is directly in the middle of that angle. It is a perpendicular bisector to line AC because it forms a 90 degree angle on the bottom.

#teamtrees #WAP (Water And Plant)

If 10% of x is 20, what is 23% of x?
A.
33
B.
46
C.
200
D.
230

Answers

Answer:

46

Step-by-step explanation:

Answer:

46

Step-by-step explanation:

First get x

x= (20/10) * 100

x=200

23% of 200 = (23*200)/100 = 46

What is the opposite of 6.6

-6.8
6.8

Answers

Answer:

-6.6

Step-by-step explanation:

I don't really understand the question but I believe it is correct.

have a good day

6.7 is the answer u welcome

Help please!!! I will give you the brainlyst if you helppp me

Answers

Answer:

the slope is 30 and it represents the total cost of the repair dont know 2 number 3 is for 10 hours he got paid 320 $ 4 ,270 $, 5,15.6

Step-by-step explanation:

.In the recipe of a ban cake 3 cups of water is needed for 6 cups of flour .
How many cup of water is needed for 12 cups of

Answers

Answer:

6 cups of water

Step-by-step explanation:

3 cups of water = 6 cups of flour.

12 ÷ 6= 2

3 x 2= 6

3/6 -> 6/12

- I hope this helps have a great day

pls help because im awful at math

Answers

Answer:

8/4

Step-by-step explanation:

because 8 is x and x goes first and y is 4 and y goes last

hope this helps!

Which expression is undefined?
A. (3 - 3)
——
7
B. 0➗5

C. (0 - 12)
——
-6
D. 8
—
(-2+2)

Answers

Answer:

Its D i had to guess but got it right :)

Step-by-step explanation:

start fraction 5.2 over 3.5 end fraction equals start fraction y over 7.5 end fraction
A. 7.25
B. 11.14
C. 5.05
D. 2.43

Answers

Answer:

A

jk its D hope this helps

Write an equation that represents the line. Use exact numbers

Answers

Answer:

y= 2/3x + 1.25

Step-by-step explanation:

I can't see the exact number but it's probably 1.25. Sorry if it's wrong :)

Mias mom paid 22.50 for 5 pizzas for a family

What is the rate for cost per pizza ...

What’s the unit price ...

Answers

$4.5 per pizza. I did 22.50/5

The temperature is 2 ∘F and drops to −15 ∘F overnight. Write and then evaluate a subtraction expression to determine the temperature change.

Enter the correct answers in the boxes.

Expression:
a

Temperature change:
∘F

Answers

2- F= -15
I assume that F (is the variable) it’s what’s missing from the equation. The change i. temperature. To find F add 2 +(-15) which is -13 so the change in temperature is -13

look at the picture that's the problem I need help with​

Answers

Answer:

I think its A

Step-by-step explanation:

60x^10y divided by 5x^4y

Answers

the answer is 12x^6y
hope this helped!!

In rhombus ABCD , m∠EAB=27∘ .

What is m∠EBC ?

Answers

Answer:

27 degrees

Step-by-step explanation:

is the answer

Other Questions
Yo can someone help me out A sequence is recursively defined by f(1)=3,f(n)=2* f(n-1) for n >=2. Write the equation for the nth term Middle School has 700 students. 70% of its students are remotelearners. How many students are remote learners? The important point(s) to remember while estimating the cash flows of a project Group of answer choices is that only cash flow is relevant are cash flow is relevant and always estimate cash flows on an incremental basis are to always estimate cash flows on an incremental basis and to be consistent in the treatment of inflation. are cash flow is relevant, always estimate cash flows on an incremental basis, and be consistent in the treatment of inflation. I need help with this geometry problem please Brandon and his friend Ben combined their allowance of $15 each, so they could buy a movie for $20. They bought a bag of popcorn to share for $2. Then they bought bags of candy with the remaining money and split the bags evenly between them. The candy cost $1 each. Which of the following most strongly contributed to the shift of power from nomadicempires to settled states that Darwin identifies in the second paragraph? As a programmer, why do you think that skills and training are needed? Give 5 reasons. why was washington not inaugurated as president under the american constitution until 1789? Hector has 10 cups of flour. Which equation shows how to determine the number of Two-fifths of a cup servings there are in the 10 cups of flour? What do you think of shigaraki? Which of the following is a true statement about the rhombus shown . A traditional check scarves made of cotton textiles from Cambodia Please help!Will mark brainliest!The picture below shows a galaxy which revolves around a single point and hasspinning arms of stars which extend from the center.What type of galaxy is shown in the picture?barred spiralirregularspiralelliptical Joshua rents an apartment in an all-brick building in the city. The value of thebelongings in the apartment is about $25,000. If Joshua wants to insure hisbelongings while renting, how much will he have to pay for insurance peryear?Annual Premium per $100 of coverageBrickSteelMixedWoodAreaBuilding Contents Building Contents Building Contents Building Contentsrating10.39 0.43 0.50.540.55 0.65 0.66 0.76Suburb | 0.45 0.52 0.56 0.63 0.72 0.74 0.83 0.85Rural 0.6 0.69 0.71 0.8 0.89 0.91 11.02CityA. $107.50B. $150.00C. $173.50D. S178.65 Let $n$ be the smallest composite number such that it can be written as the product of two positive integers that differ by 10? Think about a time when you were a member of a team. It could be a sports team, a school project team, a volunteer committee, or some other time you worked with a group to achieve a goal.what would you do differently if you could go back in time? How would you be a better team member? What contributions would you make now that you were unwilling or unable to make then? What team role(s) would you fill?(Be sure to provide reasons and examples to support your answer.) Noya needs to determine the number of books that will fit into a box. If the box has a length of 18 inches and each book is StartFraction 2 Over 9 EndFraction of an inch thick, which expression can be used to determine the number of books that will fit into the box? 18 2/9 18 times 2/9 2/9 divided by 18 9/2 divided by 18 can someone give me a good hook for why xmas is the best holiday (its for a persuasive essay and i just need a good, quick, short, hook) What are 1a 3b and 7a explains on the periodic cable