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3 years ago

In the △PQR, PQ = 39 in, PR = 17 in, and the altitude PN = 15 in. Find QR.

2 answers:

8 0

Altitude = 90* Angle

15^2+b^2 = 39^2
225+b^2 = 1521
1296 = b^2
36= b

15^2 + b^2 = 17^2
225 +b^2 = 289
64 = b^2
8 = b

36 + 8 = 44

39+17 = 56

56 is greater then 44

Triangle Inequality Theorem Proves

So QR = 44

Natali5045456 [20]3 years ago

8 0

Answer:

QR=44 or 28

Step-by-step explanation:

first you use the pythagoram theorem to find out the lenghts of RN and NQ, which lead to 36 and 8, then you add them to get 44. Put maybe QR is the hypotenuse, in which case, you get andother solution with 36 and 8, but you have to exclude NR, which gets you to 28

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PLEASE HELP !!!!!!! For what value of x is line m parallel to line n? Enter your answer in the box. x = Line m is parallel to li

Sonja [21]

Answer:

$x=10$

Step-by-step explanation:

we know that

When two lines are crossed by another line (transversal), the angles in matching corners are called Corresponding Angles.

When the line are parallel the corresponding angles are equal in measurement.

In this problem

$(8x+50)\°=130\°$ -----> by corresponding angles

see the attached figure to better understand the problem

Solve for x

Subtract 50 both sides

$8x=130-50$

$8x=80$

Divide by 8 both sides

$x=80/8$

$x=10$

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2 years ago

Graph the line whose y-intercept is -7 and whose x-intercept is 1

vesna_86 [32]

Answer:

$y=7x -7$

Step-by-step explanation:

We are given two points, the y - intercept and the x - intercept.

The y - intercept being: ( 0, -7 )

The x - intercept being: ( 1, 0 )

The equation of a line in slope - intercept form is:

y = mx + b, where m is the slope and b is the y - intercept.

We already have the y - intercept. So far we have:

y = mx - 7

What we're missing is the slope.

To find the slope, we can use this formula:

$\frac{y_{2}-y_{1} }{x_{2}-x_{1}}$ , where $x_{2}$ and $x_{1}$ are the x - coordinates of both points and $y_{2}$ and $x_{1}$ are the y - coordinates of both points.