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3 years ago

ILL GIVE BRAINLIST ON WHOEVER GETS RIGHT

Mathematics

2 answers:

iren2701 [21]3 years ago

7 0

Answer:

(2, –3) is a solution to the system of linear equations.

Step-by-step explanation:

3x - y = 9

4 x + y = 5.

Add the equations

7x = 14

x = 2

Substitute it back into either original equation to find x

3(2) - y = 9

6 - y = 9

y = -3

4(2) + y = 5.

8 + y = 5

y = -3

x = 2

y = -3

(2, -3)

(2, –3) is a solution to the system of linear equations.

Gennadij [26K]3 years ago

7 0

Answer:

its c

Step-by-step explanation:

i took the test.

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2 years ago

what is the volume of a box with the height of 3/2 inches and a length of 7/2 inches and a width of 5/2 inches

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Step-by-step explanation:

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2 years ago

Which expression is equivalent to 24 plus 64

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find the value of x of given figure and solve this question step by step plzz help question number D

Alinara [238K]

Answer:

x=15 cm

Step-by-step explanation:

The two triangles in the diagram are:

ABC and BDC

First we have to find the third side (hypotenuse) of BDC so that we can use it to find the value of x.

Hypotenuse is the largest side of a triangle which is usually in front of the right angle.

So in BDC

$Base = BD =10cm\\Hypotenuse = BC = ?\\Perpendicular = CD = 2\sqrt{11}cm$

Applying Pythagoras theorem:

$(Hypotenuse)^2 = (Base)^2 + (Perpendicular)^2\\BC^2 = BD^2 + CD^2\\BC^2 = (10)^2 + (2\sqrt{11})^2\\BC^2 = 100+(2^2 * 11)\\BC^2 = 100+(4*11)\\BC^2 = 100+44\\BC^2 = 144\\\sqrt{BC^2} = \sqrt{144}\\BC = 12cm$

Solving for triangle ABC

$Base = BC = 12 cm\\Perpendicular = AB = 9 cm\\Hypotenuse = AC = x\\$

Applying Pythagoras theorem

$AC^2 = BC^2+AB^2\\x^2 = (12)^2 + (9)^2\\x^2 = 144+81\\x^2 = 225\\\sqrt{x^2} = \sqrt{225}\\x = 15cm$

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x=15 cm

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