Why is 3+(-5) equal to -2

Why Is 3+(-5) Equal To -2

Answers

Answer 1

Answer:

c

Step-by-step explanation:

Answer 2

Here's an example: 3/5 divided by 7/8.

   3/5

  _____

   7/8

Let's do it WRONG, to see why that's bad. Here's our example, multiplied by something that ISN'T equal to one:

   3/5      1       3/5      3/5

  _____ * _____ = _______ = ______ = 3/5

   7/8     8/7     56/56      1

Multiplying 7/8 by 8/7 turns our denominator into 1, which seems helpful. But it leaves us with the same numerator we started with. Can this be right? Is 3/5 divided by 7/8 equal to 3/5 divided by one, so that 7/8 = 1? Oops, that has to be wrong.

For comparison, here's the RIGHT way:

   3/5     8/7     24/35     24/35

  _____ * _____ = _______ = _______ = 24/35

   7/8     8/7     56/56       1

In this case, what we multiplied by, 8/7 divided by 8/7, is equal to one, because anything divided by itself is equal to one. But 1 over 8/7, which we used up above in the first example, is NOT equal to one, which means that if we use 1 over 8/7, we change our question. We may get an answer, but it won't be the right one.


Related Questions

540,000 is what percent of 600,000?

Answers

90%

because 540,000/600,000 = 0.9

and 0.9 multiplied by 100 = 90

Hope this helps!

Answer:

90%

Step-by-step explanation:

540,000 x 100 / 600,000 = 90

le
What is the simplified expression for the expression below?
7(x - 4) – 3(x + 5)
0 4x - 43
O4x + 1
0 4x - 13
O 4X-9

Answers

Answer:

4x - 43

Step-by-step explanation:

7x - 28 - 3x - 15

7x - 3x - 28 - 15

4x - 43

The simplified expression is 4x - 43.

The correct option is A.

What is an expression?

A term is a single mathematical phrase. It might consist of only one variable—a letter—one number—positive or negative—or several variables multiplied but never added or subtracted. A number is placed in front of some nouns that have variables. Coefficients are numbers that come before phrases.

As per the information provided, it is given that,

7(x - 4) - 3(x + 5)

Expanding the brackets and simplifying, we get:

7(x - 4) - 3(x + 5)  = 7x - 28 - 3x - 15

7(x - 4) - 3(x + 5)  = 4x - 43

Therefore, the expression is 4x - 43.

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4 of 10
Jim was thinking of a number. Jim adds 20 to it, then doubles it and gets an answer of 99.2.
What was the original number?

Answers

You take 99.2 and subtract 20

Answer:

x =29.6

Step-by-step explanation:

Let x be the number

x+20

2(x+20) = 99.2

Divide each side by 2

x+20 = 99.2/2

x+20 = 49.6

Subtract 20

x = 49.6-20

x =29.6

Ben wants to buy 2 blue sweaters for $116 each and 3 brown sweaters for $42 each.

How much will Ben spend on the five sweaters?

Ben will spend $
on the five sweaters.

Answers

Ben will spend 468 dollars on the 5 sweaters
Blue: 116+116=232 ( two sweaters

Brown: 42+42+42=126 (3 brown sweaters

ANSWER : He will spend 358$ on 5 sweaters



HOPE THIS HELPED!!

Helpppp, what is a solution set for |a|=6

A
B
C
D

Answers

the answer should be a hope this helps :]

what is the midpoint of the segment with endpoints (17,1) and (-9,3)

Answers

Answer:

(4,2)

Step-by-step explanation:

[tex](x_{m} ,y_m) = \frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}[/tex]

(17,1) & (-9,3)

x₁ = 17, x₂ = -9

y₁ = 1, y₂ = 3

1). [tex]\frac{17+(-9)}{2}[/tex], [tex]\frac{1+3}{2}[/tex]

2). (4, 2)

PLZ HELP MEE Which choice correctly shows how to use partial products to find 250×15

?

A.

1,250+150

B.

2,500+150

C.

1,250+1,250

D.

1,250+2,500

Answers

Your correct answer would be D..

The solution of the multiplication of the 250 x 15 will be 1250 + 2500. The correct option is D.

What is multiplication?

Multiplication is the process of determining the product of two or more numbers in mathematics. A product, or an expression that specifies factors to be multiplied, is what happens when you multiply two numbers in mathematics.

When we multiply a multiplicand by one digit of a multiplier that has more than one digit, the result is known as a partial product.

Given numbers 250 and 15. The multiplication will be done as below:-

 250

 x 15

--------

1250

2500

--------

3750

Therefore, the solution of the multiplication of the 250 x 15 will be 1250 + 2500. The correct option is D.

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i can’t solve this, which choice is it?

Answers

As OP bisects ∠AOR, ∠AOP = ∠POR = 55°

So, ∠AOR = ∠AOP + ∠POR = 55° + 55° = 110°

As OS bisects ∠ROB, ∠ROS = ∠SOB = x

As total angle on a line is 180°,

110° + x + x = 180°

=> 2x = 70

=> x = 35°

∠POS = ∠POR + ∠ROS = 55° + x = 55° + 35°

=> ∠POS = 90°

It is E because you should multiply 55 by 2

what’s the answer to this equation?

Answers

the answer to that equation is. v= -1/7

PLS HELP 15 POINTSSSSSSSSS

Answers

Answer:

Rational  it's a  fraction of two integers  Irrational  can't be written as a fraction Irrational  can't be written as a fraction Rational  it can be multiplied by two numbers Irrational can't be put in even a fraction:) Hope you enjoy this :)


Determine the slope of each line, if any. Identify which of the lines is vertical or horizontal.
1. f(x)=2x-5
2. f(x)= -3x + 7
3. f(x) = x + 6
4. f(x) = 1/4x -8
5. f(x)= 1/4x-1/2​

Answers

Answers:

slope = 2slope = -3slope = 1slope = 1/4slope = 1/4

None of the five lines are horizontal or vertical

===============================================

Explanation:

Something like f(x) = 2x-5 is the same as y = 2x-5. This is because y = f(x).

Compare y = 2x-5 with y = mx+b. We see that m = 2 is the slope in this case.

The other four questions are handled the same way.

A horizontal line occurs when the slope is 0. Since none of the slopes are zero, none of the lines are horizontal.

A vertical line equation is of the form x = k, where k is any real number. The y variable is not involved. It is not possible to write a vertical line equation in the form y = mx+b because the slope m is undefined. So none of the given five equations are vertical lines.

Side note: something like y = x+6 is the same as y = 1x+6

which of the following expressions are equivalent to 16/5?
choose all answers that apply:

Answers

Answer:

None of the above.

Step-by-step explanation:

16/5 is equal to 3.2

If you calculate a.) The answer comes out to negative so no

b.) Answer comes out to negative again so no

C.) None of the above YES

Because none of them have a positive outcome like the original

Aldo the trainer has two solo workout plans that he offers his clients: plan a and plan b. Each client does either one or the other (not both). On friday there 8 were clients who did plan a and 3 who did plan b. On saturday there were 3 clients who did plan a and 5 who did plan b. Aldo trained his friday clients for a total of 7 hours and his saturday clients for a total of 6 hours. How long does each of the workout plans last?

Answers

Answer:

x = number of hours to train plan a clients

x = 0.55 hour

y = number of hours to train plan b clients

y = 0.87 hours

Step-by-step explanation:

Friday

Plan a = 8 clients

Plan b = 3 clients

Total hours = 7

Saturday

Plan a = 3 clients

Plan b = 5 clients

Total hours = 6

Let

x = number of hours to train plan a clients

y = number of hours to train plan b clients

8x + 3y = 7 (1)

3x + 5y = 6 (2)

Multiply (1) by 5 and (2) by (3)

40x + 15y = 35 (3)

9x + 15y = 18 (4)

Subtract (4) from (3)

40x - 9x = 35 - 18

31x = 17

Divide both sides by 31

x = 17 / 31

= 0.548 hour

Approximately

x = 0.55 hour

Substitute x = 0.55 hour into (1)

8x + 3y = 7

8(.55) + 3y = 7

4.4 + 3y = 7

3y = 7 - 4.4

3y = 2.6

Divide both sides by 3

y = 2.6 / 3

= 0.867 hours

Approximately

y = 0.87 hours

x = number of hours to train plan a clients

x = 0.55 hour

y = number of hours to train plan b clients

y = 0.87 hours

13-17 (my report comes tomorrow so i need help)

Answers

Answer:

44444444444444444

Step-by-step explanation:

∠A and ∠B are complementary. m∠A = 46°. Find m∠B.

Answers

Answer:

angle B will be 44°

____________________when two angle are complementary when the added up to 90°so. angle B = 90°-46°=44°

Answer:

90-46=54

Step-by-step explanation:

Express XCVI to Hindu Arabic
numerals.​

Answers

Answer:

XCVI in Hindu Arabic  numerals.​ is 96 (100-10+5+1)

PLEASE GIVE ME ANSWER PLEASE ​

Answers

sqrt((x2-x1)^2+(y2-y1)^2)

Answer:

a)sol...A/Q

x+130=180(Sum of angles on a straight line is 180 degree)

=>x=180-130

=>x=50

Hrnce,the value of x is 50 degree.

b)sol...A/Q

[tex]circumference\ of\ circle=2\pi y\\

2\pi r=2\pi y\\

r= \frac{2\pi y }{2\pi} \\

Hence,r=radius=y[/tex]

I need help with algebra 2 work pls ASAP

Answers

9514 1404 393

Answer:

  g(x) = (x +1)^2 +3

Step-by-step explanation:

You know that the transformation ...

  g(x) = f(x -h) +k

moves the f(x) graph h units to the right and k units up. In this problem, we have h=-1 (1 unit left) and k=3 (3 units up), so the transformation is ...

  g(x) = f(x +1) +3

Since f(x) = x^2, the equation for g(x) is ...

  g(x) = (x +1)^2 +3

Help with this question plzzzzzz

Answers

Answer:

C) 145 degrees

Step-by-step explanation:

angles 2 and 5 are same side interior angles, which means they're supplementary. (they add together to make 180)

using that, you can make the following equation:

(x is angle 2 to avoid confusion)

35 + x = 180

subtract 35 from both sides

x = 180 - 35

x = 145

I think it’s 145 because if 1,3,5, and 7 are the same (35) than since 1 and 3 are 35 35 plus 35 is 70 and 360 minus 70 is 290 and since 2 and 4 are the same than you would divide 290 and 2 which gives you 145 and 145 plus 145 plus 35 plus 35 equals 360

Add. Write your answer as a decimal.

10.9+(−15.6)+2.1

Answers

Answer:

−2.6

Step-by-step explanation:

it would be -2.6 because 10.9 + -15.6 = -4.7 + 2.1 = -2.6

Which pair of angles is not congruent?

Answers

Answer:

A

Step-by-step explanation:

Answer:I’m gonna say 4 and 6

Step-by-step explanation:

Because they are not congruent because if they where congruent it would have been 1/7


The time, in minutes, it took each of 11 students to complete a puzzle was recorded and is shown in the following list
9, 17, 20, 21, 27, 29, 30, 31, 32, 35, 58
One of the students who completed the puzzle claimed that there were two outliers in the data set. Based on the 1.5 x IQR rule for outliers, is there evidence to support the student's claim?

Answers

Answer:

30, 31, 32, 35, and 38

Step-by-step explanation:

(6-4p)(4p+6)
EXPAND IT AND PLEASE EXPLAIN HOW

Answers

[tex]36-16p^{2}[/tex]

Apply Difference of Two Squares Formula

(6-4p)(4p+6)=[tex]6^{2}[/tex]-([tex]4p^{2}[/tex])

BUT

(6-4p)(4p+6)

is already in the expanded form you probably want to simplify it.

:)Hope you enjoy this:)

Melanie has pieces of train track that are 8 inches long that she is connecting together to form a track that her train can travel on. Martin is also trying to construct a track for his train but is using track pieces that are 20 inches long. How long will the shortest track be if the track that Melanie builds ends up being the same length as Martin's track?

Answers

Answer:

40 inches long

Step-by-step explanation:

In order to find the shortest possible track that they can both have but still be equal in length, we need to find the least common multiple of their train track pieces. In order to do so, we simply write out the multiplication table of each of their pieces' length until we find a common number, like so

8*1 = 8                  20*1 = 20

8*2 = 16                20*2 = 40

8*3 = 24

8*4 = 32

8*5 = 40

Now we have found the first common multiple which is a value of 40 meaning that the shortest train track that they can build with the same length would be a track that is 40 inches long

Complete the table to show the number of times per year that account 3 compounds interest. Then, use that value to write the exponential expression that models the amount of money Brianna would have for account 3 after t years. The math process used to write the exponential expression for account 4 has been modeled for you:

Account 4: r = 0.03425, and n = 365 because the interest is compounded daily.

Because $250 is the initial deposit, P = 250.
I need know for 3rd year

Answers

Answer:

1 1 250(1.035)t

2 12 250(1.002896)12t

3 52 250(1.0006635)52t

4 365 250(1.0000938)365t

Step-by-step explanation:

From Plato

The complete details is shown below:

What is interest?

Interest, in its most simple form, is calculated as a percent of the principal.

Given:

r = 0.03425, and n = 365

P = 250.

                                          Table

Expression for the Amount of Money             Number of Times Interest

after t Years                                                       is Compounded per Year

                                                                                  Account

250(1.035)                                                                    1

250(1.002896)12                                                        12

250(1.0000938)365+                                               365

So,

1 *[250(1.035)t] 12* [250(1.002896)12t] 52* [250(1.0006635)52t] 365* [250(1.0000938)365t]

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what is the surface area?

Answers

I cant see the image it won’t load

8⁴x8²=8 to the power of ____​

Answers

I think it’s to the power of 6 because when you multiply powers you add them together

Answer: yeah I got it right Tyson

Step-by-step explanation:

Anna and Hannah have \$80$80dollar sign, 80 each. Their friend offered to invest their money, promising to return a sum rrr times as great as what they invested. Anna was suspicious, so she invested \$20$20dollar sign, 20 only, but Hannah invested her entire \$80$80dollar sign, 80. Fortunately, the friend did indeed return a sum rrr times as great to each.
They decided to make another investment. This time, Hannah invested all of the money returned to her, and Anna invested the money returned to her and the remaining \$60$60dollar sign, 60. Again, they got a sum rrr times as great as what they invested. In the end, Hannah had twice the amount Anna had.
Write an equation in terms of rrr that models the situation.

Answers

9514 1404 393

Answer:

  2r(20r +60) = 80r^2

Step-by-step explanation:

Anna's first investment:

  20

Anna's first return:

  20r

Anna's second investment:

  20r +60

Anna's second return:

  r(20r +60)

__

Hannah's first investment:

  80

Hannah's first return, and her second investment:

  80r

Hannah's second return:

  80r^2

__

Twice Anna's return was equal to Hannah's return:

  2r(20r +60) = 80r^2

Anne has $5000 in her savings account and decides to leave there for three years. After one year the account increases by 10%, the following year it decreases by 5% and in the third year it increases by 15%. How much is in the account after three years?

Answers

791.25 because if it increases by 10 percent which is 5500 and then it decrease by 5%
10%=550
5%=275
Which is 275 and later it increases by 15% so that’s basically it

Name all of the angle(s) that are adjacent and congruent to angle BDC​

Answers

Answer:

im not sure if im entirely correct, so i apologize in advance

<HDF

<BDG (i think)

<CDE

Step-by-step explanation:

The angles that are adjacent and congruent to ∠ BDC​ are ∠ HDF , ∠EDH and ∠CDE.

A figure is given in the question.

We have to tell about angles which are congruent to ∠ BDC.

What are the adjacent angles ?

The two angles are said to be adjacent angles when they share the common vertex and side.

As per the definition of adjacent angles ;

we can check for the adjacent angles from the figure.

Here ;

∠ BDC =  ∠ HDF.

∠ BDC =  ∠ EDH.

∠ BDC = ∠ CDE.

To check , if these are congruent too ; we must know that two angles are congruent when they have the same angle measurement, i.e., they’re equal.

if we compare from the figure ; we found that these angles are also congruent to each other.

Thus , the angles that are adjacent and congruent to ∠ BDC​ are ∠HDF , ∠EDH and ∠CDE.

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