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lana66690 [7]
3 years ago
7

HELP !!! Use the elimination method to solve the system of equations.

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
5 0

Answer:

C. (5, -3)

Step-by-step explanation:

Rewrite the first equation.

Multiply the second equation by 3 and write it under the first equation.

4x + 3y = 11

3x - 3y = 24

Now add the equations.

7x        = 35

Divide both sides by 7.

x = 5

Substitute 5 for x in the original first equation:

4(5) + 3y = 11

20 + 3y = 11

3y = -9

y = -3

Solution: (5, -3)

Dafna1 [17]3 years ago
3 0

Answer:

C. (5, -3)

Step-by-step explanation:

4x + 3y = 11

x - y = 8  (multiply by 3) --> 3x - 3y = 24


4x + 3y = 11

3x - 3y = 24

---------------------add

7x = 35

 x = 5


5 - y = 8

y = 5 - 8

y = -3

(5, -3)


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The perimeter of an ICU ward, that is rectangular in shape, is 258 feet. The width is 37 feet less than the length. Find the dim
zubka84 [21]

The dimensions of the rectangle is 83 feet x 46 feet

What is the Perimeter of a Rectangle?

The perimeter P of a rectangle is given by the formula, P = 2 ( L + W) , where L is the length and W is the width of the rectangle.

Perimeter P = 2 ( Length + Width )

Given data ,

The perimeter P of the rectangle = 258 feet

Let the length of the rectangle be = L

Let the width of the rectangle be = W

And , The width is 37 feet less than the length. ,

So , W = L - 37

Perimeter P = 2 ( Length + Width )

Substituting the values of L and W in the equation , we get

Perimeter P = 2 ( L + L - 37 )

2 ( L + L - 37 ) = 258

( L + L - 37 ) = 129

2L - 37 = 129

Adding 37 on both sides , we get

2L = 166

Divide by 2 on both sides , we get

Length L of the rectangle = 83 feet

Substituting the value of L in equation ,we get

W = L - 37

Width W of the rectangle = 46 feet

Therefore , Length = 83 feet and Width = 46 feet

Hence , the dimensions of the rectangle is 83 feet x 46 feet

To learn more about perimeter of rectangle click :

brainly.com/question/15725265

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3 0
2 years ago
You deposit $ 4000 into an account paying 6 % annual interest compounded quarterly. How much money will be in the account after
Semmy [17]

Answer:

$1200

Step-by-step explanation:

You start with your equation of 5x +.06 =4000 .  6% of 4000 is 240. times 240 by 5 and you get your answer of 1200 dollars.

7 0
3 years ago
Read 2 more answers
If f(x) = -5x + 11 and f(n) = 21, what is the value of n?
Lilit [14]

Answer:

n = -2

Step-by-step explanation:

21 = -5x + 11

10 = -5x

n = -2

8 0
3 years ago
Is this statement true or false?
bija089 [108]

Answer:

The answer is for this question is False

4 0
3 years ago
Read 2 more answers
↔ ↔
MrRissso [65]

Answer:

1. \dfrac{4}{3}

2. y=6x-11

3. 4

Step-by-step explanation:

The equation of the line that passes trough the points A(14,-1) and B(2,1) is

\dfrac{x-14}{2-14}=\dfrac{y-(-1)}{1-(-1)},\\ \\\dfrac{x-14}{-12}=\dfrac{y+1}{2},\\ \\y+1=-\dfrac{1}{6}(x-14),\\ \\y=-\dfrac{1}{6}x+\dfrac{7}{3}-1,\\ \\y=-\dfrac{1}{6}x+\dfrac{4}{3}.

The y-intercept of this line is

y=-\dfrac{1}{6}\cdot 0+\dfrac{4}{3}=\dfrac{4}{3}.

Line BC is perpendicular to line AB, then its slope is 6. Line BC passes through the point B, so

y-1=6(x-2),\\ \\y-1=6x-12,\\ \\y=6x-11.

If the y-coordinate of point C is 13, then x-coordinate is

13=6x-11,\\ \\6x=13+11,\\ \\6x=24,\\ \\x=4.

7 0
4 years ago
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