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Contact [7]
3 years ago
10

Is anyone good at elimination method? I will give 10 points to the person that answer the question. :)

Mathematics
2 answers:
Licemer1 [7]3 years ago
8 0
To eliminate x, the coefficients of x's in both equations should be opposite numbers. Since the coefficient of x in the second equation is 3, the coefficient in the first equation should be -3. So she should multiply the first equation by -3.
Anna [14]3 years ago
8 0
-3! 
-3y=-3x-24
y=3x-11
-2y=-35
y=17.5
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Paolo paid $28 for a hat that was originally priced at $35. By what percent was the hat discounted?
svetoff [14.1K]
28*100=2800
2800÷35=80
80%
8 0
3 years ago
Write the equation of a line perpendicular to y=2x-5 that passes through the point (-2,5)
yawa3891 [41]

y = mx + b

The product of slopes of perpendicular lines is -1.  The slope of the given line is 2, so the slope of the perpendicular line is -1/2.

y = (-1/2)x + b

Now use the given point to find b and finish from here.

-5 = (-1/2)(2) + b

b = ?

3 0
3 years ago
PLEASE HELP!!!
igomit [66]

Answer:

Step-by-step explanation:

-2(p + 4) = 3 - 3p + 1p.....combine like terms

-2(p + 4) = 3 - 2p...distribute the -2 through the parenthesis

-2p - 8 = 3 - 2p

-2p + 2p = 3 + 8

0 = 11 <==== no solution

if it is a false statement, it has no solutions

if it ends like : 6 = 6 or -2 = -2, then there is infinite solutions

if it ends like : x = 8 or x = -5, then there is 1 solution

3 0
3 years ago
What is equivalent to 7-2(x+2)&lt;-4-3(1-x)
Alex_Xolod [135]

after solving 7-2(x+2) we get x>2

Step-by-step explanation:

We need to find the value of x in:

7-2(x+2)

Solving:

7-2(x+2)

So, after solving 7-2(x+2) we get x>2

Keywords: Solving the expression

Learn more about Solving the expression at:

  • brainly.com/question/9390381
  • brainly.com/question/5723059
  • brainly.com/question/6075514

#learnwithBrainly

3 0
3 years ago
What is the perimeter of △ABC?
timofeeve [1]
<h3>Given</h3>
  • ΔABC
  • A(-3, -1), B(0, 3), C(1, 2)
<h3>Find</h3>
  • the length of the perimeter of ΔABC to the nearest tenth
<h3>Solution</h3>

The perimeter of a triangle is the sum of the lengths of its sides. The length of each side can be found using the Pythagorean theorem. Effectively, each pair of points is treated as the end-points of the hypotenuse of a right triangle with legs parallel to the x- and y-axes. The leg lengths are the differences betweeen the x- and y- coordinates of the points.

The difference of the x-coordinates of segment AB are 0-(-3) = 3. The y-coordinate difference is 3-(-1) = 4. So, the leg lengths of the right triangle whose hypotenuse is segment AB are 3 and 4. The Pythagorean theorem tells us

... AB² = 3² +4² = 9 +16 = 25

... AB = √25 = 5

You may recognize this as the 3-4-5 triangle often introduced as one of the first ones you play with when you learn the Pythagorean theorem.

LIkewise, segment AC has coordinate differences of ...

... C - A = (1, 2) -(-3, -1) = (4, 3)

These are the same leg lengths (in the other order) as for segment AB, so its length is also 5.

Segment BC has coordinate differences ...

... C - B = (1, 2) -(0, 3) = (1, -1)

The length of the line segment is figured as the root of the sum of squares, even though one of the coordinate differences is negative. The leg lengths of the right triangle used for finding the length of BC are the absolute value of these differences, or 1 and 1. Then the length BC is

... BC = √(1² +1²) = √2 ≈ 1.4

So the perimeter of the triangle ABC is

... AB + BC + AC = 5 + 1.4 + 5 = 11.4 . . . . perimeter of ∆ABC in units

_____

Please be aware that the advice to "round each step" is <em>bad advice,</em> in general. For real-world math problems, you only round the final result. You always carry at least enough precision in the numbers to ensure that there will not be any error in the final rounding.

In this problem, the only number that is not an integer is √2, so it doesn't really matter.

7 0
3 years ago
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