1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
creativ13 [48]
4 years ago
13

-4+ =-1 what is the missing number?

Mathematics
1 answer:
Oksi-84 [34.3K]4 years ago
4 0
T h e. a n s w e r I s t h r e e
You might be interested in
2(x + 4) = 4x + 3 – 2x + 5
melamori03 [73]

Answer:

x = infinite amount of solutions

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Algebra I</u>

  • Combining Like Terms

Step-by-step explanation:

<u>Step 1: Define Equation</u>

2(x + 4) = 4x + 3 - 2x + 5

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute 2:                              2x + 8 = 4x + 3 - 2x + 5
  2. Combine like terms:                 2x + 8 = 2x + 8
  3. Subtract 8 on both sides:        2x = 2x
  4. Divide 2 on both sides:            x = x

Here we see that <em>x</em> does indeed equal <em>x</em>.

∴ x = infinite amount of solutions

8 0
3 years ago
An airplane makes a 400-mile trip against a head wind in 4 hours. The return trip takes 2.5 hours, the wind now being a tall win
tangare [24]

Answer:

v_p=130\ miles/h

v_w=30\ miles/h

Step-by-step explanation:

Lets call v_p the the still-air speed of the plane and v_w the speed of the wind. On the first part the speed of the plane relative to the ground will be v_1=v_p-v_w, and on the second part it will be v_2=v_p+v_w.

We know that the distance d=400 miles on the first and second parts are the same, so by the definition of velocity we will have:

v_1=\frac{d}{t1}

v_2=\frac{d}{t2}

Or:

v_p-v_w=\frac{d}{t1}

v_p+v_w=\frac{d}{t2}

Adding both equations:

(v_p-v_w)+(v_p+v_w)=2v_p=\frac{d}{t1}+\frac{d}{t2}

v_p=\frac{1}{2}(\frac{d}{t1}+\frac{d}{t2})

Which for our values is:

v_p=\frac{1}{2}(\frac{400\ miles}{4h}+\frac{400\ miles}{2.5h})=130\ miles/h

If instead of adding, we substact, we would have:

(v_p+v_w)-(v_p-v_w)=2v_w=\frac{d}{t2}-\frac{d}{t1}

v_w=\frac{1}{2}(\frac{d}{t2}-\frac{d}{t1})

Which for our values is:

v_w=\frac{1}{2}(\frac{400\ miles}{2.5h}-\frac{400\ miles}{4h})=30\ miles/h

6 0
4 years ago
!!!!!!HELPPP!!!!!!
andrew11 [14]

Hey there! I'm happy to help!

A permutation is focused on a specific order, while a combination is not focused on the order but on the content of what is grouped.

AB and BA are different permutations because they are in different orders, but they are the same combination because they both contain the letters A and B.

So, we see that AB and BA are one combination.

AC and CA are also another combination because they are made up of the letters A and C.

Same goes for BC and CB, this is also one combinations.

This totals up to C. 3 combinations. Now you know the difference between permutations and combinations!

Have a wonderful day!

8 0
3 years ago
Help plssssssss !!!!!!!!!!!!!!!!!!!1 brainliest + 20 points
Nitella [24]

Answer:

2

Step-by-step explanation:

8 0
3 years ago
Daniela bought a car for $24,000. Each year the value of the car decreases by $1750. a. Write a function that shows the value of
pshichka [43]

I hope this might be able to help you.

Since the value of the car slowly decreases each year and each year is represented by <em>y</em>, the function is 24,000-1750y=f(x).

6 0
3 years ago
Other questions:
  • Can anyone help me plz?
    11·1 answer
  • A fish tank holds 1.029 yd3 of water. What is this volume in cubic meters given that 1 m = 1.093 yd? (a) 1.062 m3 (b) 0.9414 m3
    12·1 answer
  • Select the graph that would represent the best presentation of the solution set for Izl &gt; (1/2).
    11·1 answer
  • −6−1.5(4b+8)=3(−6−2b)
    14·1 answer
  • 01.02 LC)Simplify 7 + (−3)​
    8·2 answers
  • Robbins Corporation offers terms of 2/10, n/30. The sales tax rate is 6%. Source documents are abbreviated as follows: receipt,
    11·1 answer
  • EXPRESAR CADA UNO DE LOS VALORES NUTRICIONALES DE LA NARANJA COMO FRACCIÓN. cuál es el valor nutricional total de la naranja
    14·1 answer
  • Which choice shows the best estimate of the product 0.52 x 695?
    10·2 answers
  • 9,-7 with a translation of (x-8,y)
    11·2 answers
  • Can someone help me find x? Ty
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!