I got it wrong im stupid at this kind of stuff please help

Answer:

f(-1)=3

Step-by-step explanation:

plug in -1 for x

-(-1)+2

negative and negative make a positive 1+2=3

Answer:

The answer is 5.

Step-by-step explanation:

That dot is basically a multiplication sign.

Answer:

the dot is a sign for multiplication. Sometimes people use "•" because "x" can sometimes confuses people because "x" is a variable in algebra as well

Step-by-step explanation:

Answer:

2 cm

Step-by-step explanation:

Answer:

the answer is 2cm

Step-by-step explanation:

Answer:

The constant of proportionality is 490

The jet will take 12 hours to travel 5,880 miles

Step-by-step explanation: The miles multiply by 490 each time.

490 x 12 is 5,880

The constant of proportionality is k = 490 and the equation is y = 490x where x is the number of hours and y is the total number of miles

The time required is 12 hours

What is Proportion?

The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.

The proportional equation is given as y ∝ x

And , y = kx where k is the proportionality constant

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Given data ,

Let the equation be represented as A

Now , the value of A is

Let the distance of the aircraft be = x

Let the total time taken by the aircraft be = y

Let the constant of proportionality be k

when x = 1 ,

y = 490

So , the equation will be y = kx

Substituting the values in the equation , we get

y = 490x

when x = 2

y = 490 ( 2 )

y = 980

Now , the time taken by aircraft to travel 5,880 miles is

Substitute the value of y as 5880 in the equation , we get

5880 = 490x

Divide by 490 on both sides of the equation , we get

x = 5880 / 490

x = 12

Therefore , the time taken is 12 hours

Hence , the constant of proportionality is 490

To learn more about proportion click :

https://brainly.com/question/7096655

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Answer:

Step-by-step explanation:

B

Answer:

Step-by-step explanation:

1). (B). Replace one equation with the sum/difference of both equation.

System B is

- 4x - 6y = 9 ........ (1B)

-4x + 3x = - x

- 6y + y = - 5y

9 - 4 = 5

- x - 5y = 5 ........ (2B)

2). Yes, both system are equivalent.

Answer:

180 inches

Step-by-step explanation:

36x5= 180

Answer:

if she already has 36 inches and we are tying to find how much she need we need to take that 5 and multiple it to the 36 because the word TIMES means to multiple so 36x5= 180. so your answer will be she will need 180 in (since that is the measurement we are using)

Step-by-step explanation:

Answer:

363 feet

Step-by-step explanation:

330 ft / 10 seconds = 33 ft per second

33 * 11 seconds = 363 feet

Answer:

x=2

y=-1

z=3

Step-by-step explanation:

X = 7+2y-z

3(7+2y-z)+y-z=2

21+6y-3z+y-z=2

21+7y-4z=2

7y-4z=-19 (subtract both side by 21)

2(7+2y-z)+3y+2z=7

14+4y-2z+3y+2z=7

14+7y=7

7y=-7 (subtract both side by 14)

y=-1 (divide both side by 7)

{7y-4z=-19

{y=-1

7.-1 - 4z=-19

-7-4z=-19

-4z=-12

Z=3

x=7+2y-z (y=-1 z=3)

x=7+2.-1 - 3

x=7-2-3

x=2

Answer:

the answer is   B  2:7

Step-by-step explanation:

Combine like terms.

6x + 5z + 4

Answer:7?

Step-by-step explanation:

Rise 7

Run. 1

Answer:

-3/9

Step-by-step explanation:

m = 1 - 4/11 - 2 (this is the form it's in: m = y2 - y1/x2 - x1)

m = -3/9

rise: -3

run: 9

(m = slope)

if this doesn't make sense look up "how to find the slope of two points"

hope this helps!

Answer:

where is part b?

Step-by-step explanation:

can i see a picture of part b?

Answer:

is it 17/5?

Step-by-step explanation:

49.65 lbs

the pic is blurry so i hope i added right, but i believe all you had to do was add it all together

Answer:

Я знаю, что ты крут, и мне очень нравится твой pfp

Step-by-step explanation:

Answer:

1:1

Step-by-step explanation:

w = f, which means the amount of water equals the amount of flour.

Answer:

It’s A hope this is right good luck

Answer:

4a^2 (8a+3)

Step-by-step explanation: it’s right

Answer:

A.

Step-by-step explanation:

edg 2021

Answer:

Yes

Step-by-step explanation:

-3(-3) = 9

Product of two negatives is positive

Answer:

yes, -3 is a solution of -3x = 9

Step-by-step explanation:

substitute -3 for x in the equation

-3x = 9

-3*-3 = 9

9 = 9

since 9 does in fact equal 9, the answer is yes!

Answer:

It's supposed to be y=2

y is the dependent variable = -4 is slope and x is independent plus 2 which is y intercept

Answer:

95%

Step-by-step explanation:

95% of 2,320 = 2204

2320 - 2204 = 116

Answer:  

Multiply 48 by .15, you get 7.20

Subtract 7.20 fro 48

Your answer is $40.80

Have a great day and thanksgiveing  break

Answer:

Step-by-step explanation:

Multiply 48 by .15, you get 7.20

Subtract 7.20 fro 48

Your answer is $40.80

does this help

Answer:

Answer:

(x - 20)(x - 1)

Step-by-step explanation:

Given

x² - 21x + 20

Consider the factors of the constant term (+ 20) which sum to give the coefficient of the x- term (- 21)

The factors are - 20 and - 1 , since

- 20 × - 1 = + 20 and - 20 - 1 = - 21 , thus

x² - 21x + 20 =  (x - 20)(x - 1) ← in factored form

Answer:[tex](x-1)(x-20)[/tex]

Step-by-step explanation:

(x-1)(x-20)

[tex]x^{2}[/tex]-20x-1x+20

[tex]x^{2}[/tex]-21x+20

Answer:

11n

Step-by-step explanation:

We don't know the value of N, so we leave that the same.

3 to the second power, (3x3)= 9.

We have to add 2 to 9, so 9+2=11

Add your n to the end, and your answer is 11n.

(C.) Javier: I can’t do my homework. I have a terrible headache.