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
vodomira [7]
3 years ago
7

Zina solves a system of linear equations by elimination and finds a solution of (2, 2). One of the equations is a + b = 4. What

is the other equation?
Mathematics
1 answer:
kodGreya [7K]3 years ago
4 0
A - b = 0 <=== ur other equation

check...
a + b = 4
a - b = 0
--------------add
2a = 4
a = 4/2
a = 2

a - b = 0
2 - b = 0
-b = 0 - 2
-b = -2
b = 2

solution is (2,2)
You might be interested in
PLSSSS HELPPP MEEEEEE
Brrunno [24]

Hi, I'm happy to help!

Parallel means that two lines are lined up in the same directions and will never intersect even if they were extended forever in directions.

Let's look at the first option of AB, and AD. We can see that both lines intersect at point A, so AB and AD are not parallel.

For the next option of CD and BE, we can see that both lines don't intersect and won't ever even if the lines were extended. So, CD and BE are parallel.

For the third option, we have BC and DE. These lines don't intersect and aren't in line to ever do so. Therefore, BC and DE and parallel.

The last option is AD and BC. These two lines will never meet, but, they aren't line up in the same directions. AD is traveling upwards while BC isn't. Think about being able to make a road out of the two lines, it would never work. AD and BC are not parallel.

<u>To sum it up: You should select the 2nd and 3rd options because those lines are parallel.</u>

<u></u>

I hope this was helpful, keep learning! :D

7 0
3 years ago
A chess player moves a knight from the location (3, 2) to (5, 1) on a chessboard. If the bottom-left square is labeled (1, 1), t
Deffense [45]
<span>If a player </span>moves a knight from the location (3, 2) to (5, 1) on a chessboard the translation made is 2 squares up, 1 square left.

If the player moves the knight from (5, 1) to (6, 3), the translation made is <span>2 squares right, 1 square up.</span>
7 0
3 years ago
Read 2 more answers
Part 3 <br>please help <br>​
aleksandr82 [10.1K]

I'm taking "part 3" to mean the 3rd of the posted questions.

If f(x)=(x^3+2x)\ln x, then

f'(x)=(x^3+2x)'\ln x+(x^3+2x)(\ln x)'=(3x^2+2)\ln x+\dfrac{x^3+2x}x

\implies f'(x)=(3x^2+2)\ln x+x^2+2

Then when x=1, we get f'(1)=3.

6 0
3 years ago
Does anyone know any of these two??
Neporo4naja [7]
First Problem:

angle R and angle S are complementary which means they add to 90 degrees. Think "C" for "Complementary" and "Corner" as in a sharp 90 degree corner. That's how I remember it.

Let's solve for x
(angle R) + (angle S) = 90
(12x-3) + (7x-2) = 90
12x-3 + 7x-2 = 90
(12x+7x)+(-3-2) = 90
19x-5 = 90
19x-5+5 = 90+5
19x = 95
19x/19 = 95/19
x = 5

Since x = 5, we can say
angle R = 12x - 3
angle R = 12*5 - 3
angle R = 60 - 3
angle R = 57 degrees

Final Answer: 57 degrees

-----------------------------------------------------------

Second Problem:

Angle 1 and angle 2 "form a linear pair". This means they are adjacent and supplementary (add to 180 degrees). Put another way, they combine to form a single straight angle or line.

Let's make 
x = measure of angle 1
y = measure of angle 2

We're also told that "the measure of angle 2 is six more than twice the measure of angle 1", which basically translates to
y = 2*x + 6

Because the angles (x and y) are supplementary, we can also say
x+y = 180

So we have this system of equations
y = 2x+6
x+y = 180

Start with equation (2). Plug in the equation (1) and solve for x
x+y = 180
x+2x+6 = 180 ... note how y has been replaced with 2x+6
3x+6 = 180
3x+6-6 = 180-6
3x = 174
3x/3 = 174/3
x = 58

Now that we know x, we can find y
y = 2x+6
y = 2*58+6
y = 116+6
y = 122

Final Answer: 122 degrees
8 0
3 years ago
Geometry, multiple choice. Answer all if possible. Ty.
faltersainse [42]
12. The answer is B because the sum of any two sides of a triangle must be greater than the other side.
A. 4 → 4 + 4 is not GREATER than 8
B. 8 → 4 + 8 is greater than 8 and 8 + 8 is greater than 4
C. 12 → 4 + 8 is not GREATER than 12 
D. 16 → 4 + 8 is not GREATER than 16

13. The central angle containing the green beans is 360° - (195°+98°) = 67°.
If the diameter of the circle is 12 then the circumference = πd = 12π.
\frac{67}{360}× 12π≈7.013
So the correct answer is A
67/360 represents the portion of the circle which is green beans and you multiply it by the circumference to find the length of that arc.
3 0
4 years ago
Other questions:
  • Please help me answer this question
    7·1 answer
  • Imagine you own a lawn-mowing business. Which visual representation would best show how much your income varies over the course
    14·2 answers
  • What is the product? (9r-4)(-9r-4)
    12·1 answer
  • PLS HELP ME ASAP FOR 12!!! (MUST SHOW WORK!!) + GIVING BRAINLIEST AND THANKS!! *LOTS OF POINTS!!*
    7·1 answer
  • Need help for number 13 and 14. The worksheet given to me is called simplifying rational exponents, my teacher gives us the answ
    11·1 answer
  • PLEASE HELP ASAP (20 points) Basic Inverse Function Question<br> *see attachment*
    9·1 answer
  • (20 POINTS AND BRAINLIEST PLS HALP)
    11·1 answer
  • What is <img src="https://tex.z-dn.net/?f=12%5Csqrt1248" id="TexFormula1" title="12\sqrt1248" alt="12\sqrt1248" align="absmiddle
    15·1 answer
  • Pls help
    12·1 answer
  • Use the following images to answer the question:
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!