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katen-ka-za [31]
2 years ago
8

Use substitution to find the ordered pair of the following system of equations:

Mathematics
2 answers:
Marat540 [252]2 years ago
3 0

Answer:

first substitute 'y' in 2nd equation by right side of 1st one and you get:

now substract 5x from both sides of 2nd equal and you get:

as a result of the equal above you get:

now substitute x in very first equation by the result from above (x=7):

Step-by-step explanation:

sorry if its wrong

dusya [7]2 years ago
3 0
6x = 5x + 7
-5x -5x
——————
x = 7
y = 6x
y = 6(7) = 42

Your answer: (7, 42)
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Set up a proportion.<br> What is h?
Ulleksa [173]

Answer:

<u><em>Decimal</em></u><u><em>:</em></u>

h = 4.2 ft

<em><u>Fraction</u></em><em><u>:</u></em>

h=4\frac{1}{5} ft

Step-by-step explanation:

\frac{9}{15} :\frac{h}{7}

<u><em>Cross multiply.</em></u>

h · 15 = 9 · 7

<u><em>Simplify.</em></u>

15h = 63

<u><em>Divide each side by 15.</em></u>

15h ÷ 15 = 63 ÷ 15

<em><u>Simplify.</u></em>

h = 4.2

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2 years ago
Find the midpoint of the line segment with end coordinates of:<br> (1,4) and (5,2)
poizon [28]
Midpoint formula: (x1+x2)/2, (y1+y2)/2
(1+5)/2 = 6/2 = 3 for x
(5+2)/2 = 7/2 = 3.5 for y
Midpoint: (3,3.5)
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2 years ago
Can someone please help me !?!
statuscvo [17]

Answer:

40

Step-by-step explanation:

The area of a triangle is base * height * 1/2. The base is 8 and the height is 10, making the area = 8 * 10/2 = 40

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2 years ago
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If an individual saves $5,700 and elects to place the total dollar amount into a savings account earning 2.75% APR compounded mo
Naddika [18.5K]

Answer:

$7,925.53

Step-by-step explanation:

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A = final amount (?)

P = starting amount (5700)

r = rate

n = times applied (12 since its monthly and there 12 months in a year)

x = years (12)

A = 5700(1 + 0.0275/12)¹⁴⁴

A = 7925.525498629932

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3 years ago
Solve for x and y<br><br>6/x+2y + 5/x-2y = -3 ;<br>3/x+2y + 7/x-2y = -6​
Radda [10]

Step-by-step explanation:

Let

{1/(x+2y)} = u -----Eqn(1)

{1/(x-2y)} = v ------Eqn(2)

So, given equation can be rewritten as

⇛6u + 5v = -3 ---Eqn(3)

⇛3u + 7v = -6 -----Eqn(4)

On multiply equation (4) by 2, we get

⇛6u + 14v = -12 -----Eqn(5)

On subtracting equation (3) from equation (5), we get

⇛9v = -9

⇛v = -9/9

⇛v = -1 ----Eqn(6)

Put value of v in equation (3), we get

6u + 5v = -3

⇛6u + 5 * (-1) = -3

⇛6u -5 = -3

⇛6u = -3 + 5

⇛6u = 2

⇛u = 2/6

⇛u = (2÷2)/(6÷2)

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Now, substituting value of u and v in equation (1) and equation (2), we get

{1/(x+2y)} = 1/3 and {1/(x-2y)} = -1

⇛x + 2y = 3 -----Eqn(8)

⇛x - 2y = -1 -------Eqn(9)

Now, add equation (8) and equation (9) , we get

⇛2x = 2

⇛x = 2/2

<h3>⇛x = 1 -----Eqn(10)</h3>

On substituting x = 1 in equation (8), we get

x + 2y = 3

⇛ 1 + 2y = 3

⇛2y = 3 - 1

⇛2y = 2

⇛y = 2/2

<h3>⇛y = 1 ------Eqn(11)</h3>

Therefore, x = 1 and y = 1

<u>Answer</u><u>:</u> Hence the value of x and y is 1 and 1.

8 0
2 years ago
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