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

Write 23/6 as a mixed number.

Answers

Answer: 3 5/6

Step-by-step explanation:

A mixed number takes the whole number out of the improper fraction. The whole number 3 can be taken out of 23/6 (18/6). Then, there is a remainder of 5/6. Add the two together and the mixed number would be 3 5/6.

23/6 as a mixed number is [tex]3\frac{5}{6}[/tex]

What is Fraction?

A fraction represents a part of a whole.

We have to write 23/6 as a mixed number

Divide the numerator (23) by the denominator (6) and write the result as a whole number plus a fraction

23 ÷ 6 = 3 with a remainder of 5

So, 23/6 is equal to 3 and 5/6 as a mixed number.

Hence, 23/6 as a mixed number is [tex]3\frac{5}{6}[/tex]

To learn more on Fractions click:

https://brainly.com/question/10354322

#SPJ5

Which equations represent the phrase “y is two less than half of a number “?

Answers

Answer:

C and A

Step-by-step explanation:

Yo can I get some help with this ?

Answers

60 maybe all triangles = 180 i think so divided by 3 cause all sides are equal would be 60

Answer:

Y= 60 degrees.

Step-by-step explanation:

A traingle's three angles always equals 180 degrees. since the singular line on the triangle on the right mean the side are equal, the angles are also equal. 180 divided by 3 equals 60 degrees.

Zara has forgotten her 4-digit PIN code.
She knows the first digit is a factor of 20 and the 4 digits make a number divisible by 2.
How many different sets of 4 digits could it be?

Answers

Step-by-step explanation:

1st digit : 1 / 2 / 4 / 5

4th digit : 0 / 2 / 4 / 6 / 8

Total number of sets = 4 * 10 * 10 * 5 = 2000.

Freddy is buying wings and nachos for a party. A box of 10 wings cost $10.00. Nachos cost $4.00 per tray. He must spend less that $40.00 on the wings and nachos.

Using x to represent each box of wings and y to represent each tray of nachos, create an inequality that correctly represents the possible number of boxes of wings and trays of nachos Freddy can be and still be within his budget.

Answers

Answer:

10x + 4y < 40

Step-by-step explanation:

The creation of an inequality is as follows"

The cost of the 10 wings box = $10

The cost of nachos = $4 per tray

And, the amount that can be incurred less is $40

Based on the information,

The equation would be

10x + 4y < 40

Hence, the inequality equation is 10x + 4y<40

Solve for X.

-24+6x=-6

Answers

Answer:

3

Step-by-step explanation:

start by added 24 to both sides to get

6x = 18

then divide 18 by 6 to get

x = 3

Answer:

x=3

Step-by-step explanation:

Get your constant -24 to the other side to isolate the 6x.

-24+24+6x=-6+24

6x=18

Now since the 6 is multiplied by the x to isolate the x further divide 6x by 6, make sure to divide both sides. It should look like:

6x/6=18/6

x=3

To prove the answer just plug in 3 into the orginal equation and if both sides are equal its correct.

(y-4)6

help please....

Answers

6y-24

6(y) =6y
4(6)= 24

Refer to the circles to complete the following item.

Does AI = LD?

yes
no​

Answers

Answer:

i believe it’s no. sorry if i’m wrong!

Step-by-step explanation:

no,
it pretty specifically says that AI is 2” while LD is 3”
pretty sure this makes them unequal.

Sangeet got 96% of his answers right in a test of 50 marks. What was his score out of 50?​

Answers

Answer:

48/50

Step-by-step explanation:

So find 96 percent of 50

Now divide it

48/50

You dont gotta divide, leave it as fraction

I need help ASAP!!!!

Answers

Answer:

1/5

Step-by-step explanation:

......................

Answer:

10/50 - 1/5. The simplest form is 1/5

Hope This Helps!

What is the coefficient of the variable in the expression 6 − 4x − 8 + 2? (3 points)

Group of answer choices

A. 6

B. 2

C. −4

D. −8

Answers

Answer:

I thik the answer is B.

Step-by-step explanation:

hope this helps

Answer:

c -4

I did the math

f(2)=-2 and f(1)=1 write a linear function

Answers

Answer:

[tex]f(x) = -3x+4[/tex]

Step-by-step explanation:

We can use the form [tex]y=mx+b[/tex] to find the linear function.

From [tex]f(2)=-2[/tex] , we can write:

[tex]-2=2m+b[/tex]

From [tex]f(1)=1[/tex] , we can write:

[tex]1=m+b[/tex]

To find for [tex]m[/tex], we can substract the second equation from the first:

[tex]2m+b-(m+b) = -2-1[/tex]

[tex]2m+b-m-b=-3[/tex]

[tex]m=-3[/tex]

To find for [tex]b[/tex], we can use substitution:

[tex]1 = m+b[/tex]

[tex]1 = -3+b[/tex]

[tex]b=4[/tex]

∴ [tex]f(x) = -3x+4[/tex] is the linear function.

Hope this helps :)

Help will give crown

Answers

G and H are 5 units apart.

G is at (-3, -4), and H is at (2, -4)

-3 and 2 are 5 units apart, -3+5=2. 2-5=-3

I need help for this question ASAP

Answers

Use the Pythagorean Theorem:
Formula is a^2+b^2=c^2 so
x^2+(15)^2=(17)^2
x^2+225=289
x^2=64
x=8

We know x is 8 so add them all together
8+15+17=40

perimeter=40

A baker has 7 3/4 bags of flour.Each bag of flour will make 60 cakes.How many cakes will the baker be able to make if she uses all these bags of flour.

400 3/4

265

80 1/2

465

Answers

The baker would be able to make 465 cakes. Or D.

Because, 7 x 60 = 420. 60 ÷ 4 = 15. 15 x 3 = 45. 420 + 45 = 465.

Please help me solve these problems! I'll give you all my brain points. IM DESPERATE!!!
:-;

Answers

Answer: kg

Step-by-step explanation:

9th grade please help

Answers

Answer:

D.) This system has infinitely many solutions

Step-by-step explanation:

y = -4x - 6

-4x - y - 6 = 0

-4x - y - 6 = 0

-y = 4x + 6

-y/-1 = 4x/-1 + 6/-1

y = -4x - 6

There are infinitely many solutions, because both of the lines are exactly the same. As show below ! Hope this helps once again ^w^

4=8b what does b equal

Answers

Answer:

4 = 8b >> b = 1/2 or 0.5

Step-by-step explanation:

Can someone help me answer these?? Pls I need this by tomorrow

Answers

Answer:

7/8= 0.875

7/20= 0.35

18/20= 0.9

7/8= 0.875

68/50= 1.36

25/20= 1.25

26/25= 1.04

11/10= 1.10

11/16= 0.6875

9/16= 0.5625

33/40= 0.825

23/40= 0.575

14/10= 1.4

29/25= 1.16

39/40= 0.975

Step-by-step explanation:

Answer:

.875, .35, .9, .875, 1.36, 1.25, 1.04, 1.1, .6875, .4375, .825, .575, 1.4, 1.16, .975

Step-by-step explanation:

Divide the nymeratir by the denominator- n÷ d= x

btw I did each rown going down

Erica went bowling with her friends. She paid $3 to rent shoes and then $5 for each game of bowling. If she
spent a total of $23, then how many games did Erica bowl?

Answers

Answer:

4 games

Step-by-step explanation:

23 - 3 = 20

20 / 5 = 4

Erica played 4 games because if you subtract 3 then divide 20 by 5 you get your answer.

Graph this line using the slope and y-intercept:
y= -9x +5

Answers

do you need more of an explanation? i can explain how to do it if u would like! :)

The price of an Item yesterday was $160. Today, the price rose to $248. Find the percent increase.

Answers

Answer:

jguifutrdduturdrfuy

Step-by-step explanation:

B right or am i wrong ?

Answers

it’s A aownsownsisns

Please answer will give brainiest! If you don’t know please don’t answer thank you <3

Answers

Answer:It takes 250 g of pasta and 240 ml of sauce to make one batch of spaghetti and it takes 600g of pasta and 700ml of sauce to make one batch of lasagna.

Case 1: Pasta

The chef wants to make spaghetti and lasagna using more than 4000 g of pasta.

S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.

So the equation becomes :

Case 2: Sauce

chef wants to make spaghetti and lasagna using more than 5000 ml of sauce.

S denote the number of batches of spaghetti he makes and L the number of batches of lasagna he makes.

So the equation becomes:

Answer :

The two equations are :

For pasta:

For sauce:

Step-by-step explanation:

A submarine dives below the surface, heading downward in four moves. If each move downward was 200 feet, where is the submarine after it is finished diving?

Answers

Answer:

800 feet, if you do 200x4 you you would get 800 feet

Step-by-step explanation:

200x4

Help I don't know his help meeee

Answers

Answer:

30

Step-by-step explanation:

The rise is the space between the two points vertically.

We can take the two y points (60 and 120) and find the difference between the two. 120 - 60 = 60 between the two. That means the rise = 60.

The run is the difference between the two points horizontally. We can take the two x points (4 and 2) and find the difference between the two. 4 - 2 = 2. The run = 2. Rise/run = 60/2. This can be simplified to 30/1 or 30.

can someone please help me answer this? im struggling!! i will mark brainliest and rate 5 stars!!

Answers

Answer:

3.5 scale factor

Step-by-step explanation:

if you multiply any number from triangle RST by 3 you get they answer of the other triangle.

find the value of x log2x-log(x-3)=1

Answers

Answer:

15/4

Step-by-step explanation:

Answer:

15/4

Step-by-step explanation:

log2x-log(x-3)=1

log(2x/x-3)=1

2x/x-3=10¹

2x/x-3=10

2x=10x-30

10x-2x=30

8x=30

x=30/8

x=15/4

A total of 715 tickets were sold for the school play. They were either adult tickets or student tickets. There were 65 more student tickets sold than adult tickets.

Answers

Answer:

There were 423 adult tickets sold.

Step-by-step explanation:

Let x = the number of adult tickets sold

Let x + 65 = the number of student tickets sold

x + x + 65 = 715

2x = 715

x = 357.5

x + 65 = 422.5 (round up)

Answer:

adults=325& students=390

Step-by-step explanation:

let me the tickets for adults be x

for students will be x+65

x+x+65=715

2x+65=715

2x=715-65

2x=650

x=650÷2

x=325

what is measurement
​

Answers

Measurement is the numerical quantitation of the attributes of an object or event, which can be used to compare with other objects or events. The scope and application of measurement are dependent on the context and discipline

Ans Measurement is the process of comparing and unknown physical quantity with a known or standard one.

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