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3 years ago

(10 points)determine which one is an right angle

Mathematics

1 answer:

Elden [556K]3 years ago

8 0

Answer:

Number 7.

since it makes an L shape, and has a 90° angle

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Graph this function using intercepts Solve 10x+9y=-90

Alex17521 [72]

Answer:

Step-by-step explanation:

So first, lets solve for the intercepts.

Let’s start by finding the x intercept.

Plug in 0 for y.

10x+9(0)=-90

10x=-90

X=-9, so your first point on your line will be (-9,0).

Now the y intercept.

Plug in 0 for x.

10(0)+9y=-90

9y=-90

Y=-10, so your second point on your line will be (0,-10).

Use those points to create your line.

6 0

3 years ago

Write the equation of this circle in standard form. A) (x - 2)2 + (y - 3)2 = 4

Vika [28.1K]

Answer:

$x^2 + y^2 -4x -6y + 9 = 0$

Step-by-step explanation:

To write a circle in standard form, expand the equation of the circle and move all terms to one side.

$(x-2)^2 + (y-3)^2 = 4\\x^2 -4x + 4 + y^2 -6y + 9 = 4\\x^2 +y^2 - 4x - 6y + 13 = 4\\x^2 + y^2 -4x -6y + 9 = 0$

8 0

3 years ago

At one time the aircraft is 150 m above the surface, the submarine is 25 m below the surface, and the underwater robotic vehicle

EastWind [94]

Answer:

$175$ meter is difference in height between the submarine and the aircraft

Step-by-step explanation:

The height of aircraft above the surface $= 150$ meter

Depth at which the submarine lies below the surface $= 25$ meter

Depth at which the underwater robotic vehicle below the surface $= 186$ meter

Difference in height between the submarine and aircraft is equal to

$25 +150 = 175$ meter

4 0

3 years ago

The price for each apple is n. The number of the apple bought by Linda, Leo and Joe is x, y and z. Which of the following expres

lisabon 2012 [21]

Answer:

n(x + y + z)

Step-by-step explanation:

The total number of apples bought is x+y+z. The total expense is the product of the cost and the number bought. If each one costs "n", then the cost is ...

n(x +y +z)

8 0

3 years ago

Read 2 more answers

Three vectors A, B, C in three-dimensional space satisfy the following properties

wlad13 [49]

Answer:

$\frac{7}{8}\pi$

Step-by-step explanation:

observe

||a–b+c|| = ||a+b+c||

(a-b+c)² = (a+b+c)²

(a+b+c)² – (a-b+c)² = 0

((a+b+c)+(a-b+c))((a+b+c)–(a-b+c)) = 0

(2a+2c)(2b) = 0

(a+c)b = 0

a•b + c•b = 0

||a||×||b||×cos(π/8) + ||c||×||b||×cos(θ) = 0

$\cos(\theta)=-\frac{||a||\times ||b|| \times \cos(\frac{\pi}{8})}{||c||\times ||b||}=-\cos(\frac{\pi}{8})\\ \theta=\frac{7}{8}\pi$

3 0

4 years ago