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3 years ago

Find the x-intercept of the line whose equation is 8x + 2y =4

Mathematics

1 answer:

Alex787 [66]3 years ago

6 0

Answer:

<h2>x - intercept= 1/2</h2>

Step-by-step explanation:

$8x + 2y =4\\Substitute ,y for ;0\\8x+2(0)=4\\8x+0=4\\8x=4\\\frac{8x}{8} =\frac{4}{8} x = 1/2\\(\frac{1}{2} , 0) -x-intercept$

METHOD 2

$(-\frac{c}{a} , 0)\\a = 8\\b = 2\\c = -4\\\frac{-(-4)}{8} \\x-intercept = \frac{4}{8} \\\\x-intercept = \frac{1}{2}\\(1/2 , 0)$

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Please help!! thanks!

svetlana [45]

Answer:

A.) Yes

Step-by-step explanation:

Plug in (3,2) into both equations ....

2(3) - 3(2) = 0

2(3) + 2 = 8

Then solve ....

2(3) - 3(2) = 0

6 - 6 = 0

0 = 0

2(3) + 2 = 8

6 + 2 = 8

8 = 8

Since both equation are true the solution (3,2) is true

3 0

3 years ago

Suppose your heart is beating 72 times per minute. At this rate, how many times will it beat in 15 minutes?

andre [41]

72 times per minute

72*15 = 1080

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4 years ago

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How many numbers are there from x through 7x-8

kondaur [170]

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3 years ago

A color printer prints 31 pages in 9 minutes. How many pages does it print per minute?

djyliett [7]

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3 years ago

in the figure below trianglePQM and triangleQRP are right triangles. the measure of lineQM is 6 and the measure of lineQP is 8.

Kipish [7]

Answer:

Option 4 is correct. The length of PR is 6.4 units.

Step-by-step explanation:

From the given figure it is noticed that the triangle PQR and triangle MQR.

Let the length of PR be x.

Pythagoras formula

$hypotenuse^2=base^2+perpendicular^2$

Use pythagoras formula for triangle PQM.

$PM^2=QM^2+PQ^2$

$PM^2=(6)^2+(8)^2$

$PM^2=36+64$

$PM^2=100$

$PM=10$

The value of PM is 10. The length of PR is x, so the length of MR is (10-x).

Use pythagoras formula for triangle PQR.

$PQ^2=QR^2+PR^2$

$(8)^2=QR^2+x^2$

$64-x^2=QR^2$ .....(1)

Use pythagoras formula for triangle MQR.

$MQ^2=QR^2+MR^2$

$(6)^2=QR^2+(10-x)^2$

$36=QR^2+x^2-20x+100$

$36-x^2+20x-100=QR^2$ .... (2)

From equation (1) and (2) we get

$36-x^2+20x-100=64-x^2$

$20x-64=64$

$20x=128$

$x=6.4$

Therefore length of PR is 6.4 units and option 4 is correct.

3 0

3 years ago