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Mamont248 [21]
3 years ago
10

Find the equation of a line that is parallel to y=x+3 and passes through the point (-2,-4)

Mathematics
1 answer:
Elenna [48]3 years ago
7 0

Answer:

hope this helps you

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Cho pt: x²+ (m-3)x-5=0<br><br>Tìm m để pt có hai nghiệm x1 x2 thoả x1²+x2²-5x1x2+3x1+3x2=4
marin [14]

Answer:

Step-by-step explanation:

delta=( m-3)^2+4*5

pt có 2 nghiệm x1 x2 khi delta>0<=>(m-3)^2+20>0(luôn đúng)

Viet: x1+x2=3-m

x1x2=-5

x1^{2} +x2^{2} -5x1x2+3x1+3x2=4

<=>(x1+x2)^{2}-7x1x2+3(x1+x2)=4

<=>(3-m)^2+35+3*(3-m)=4

<=>m^2-6m+9+35-3m+9-4=0

<=>m^2-9m+49=0

6 0
3 years ago
Solve equation if 0 degrees is less than or even to x which is less than or equal to 360 degrees
Elena L [17]

Answer:

x = 60°

Step-by-step explanation:

Use special triangles.

Starting with an equilateral triangle (all angles at 60°) with the side length of 2. Drop an altitude from one of the vertices to cut in half and make a right - triangle.

The hypotenuse length is 2. The base length, because it was cut in half, is 1. The height can be found with the Pythagorean theorem, which is √3.

The ratio for tangent is opposite over adjacent.

Since √3 = √3 / 1, the angle must be the one as marked in the picture.

Remember this triangle came from an equilateral triangle, so that angle is 60°. It was not cut in half, unlike the top angle which is 30°.

7 0
3 years ago
Find the measure of CD.<br> mCD= [?] degrees
Aloiza [94]

Given:

A circle with radius 7 units and chord CD = 7 units.

To find:

The measure of arc CD.

Solution:

Let O be the center of the circle.

In triangle OCD,

OC=7            (Given)

OC=OD=7          (Radii of same circle)

CD=7            (Given)

Since OC=CD=OD all sides are equal, therefore, the triangle OCD is an equilateral triangle.

Measure of each angle of an equilateral triangle is 60 degrees. So,

m\angle COD=60^\circ

The measure of central angle is equal to the measure of corresponding arc.

m(arcCD)=m\angle COD

m(arcCD)=60^\circ

Therefore, the measure of arc CD is 60 degrees.

7 0
3 years ago
Which relationship is not a function 10 POINTS
Lorico [155]

Answer:

top left

Step-by-step explanation:

take a vertical line and place it on the graph. Then no matter where on the graph you place the vertical line, the graph should only cross the vertical line once. ( it only crossed once)

4 0
3 years ago
A sequence can be defined by the explicit formula an = 5 - 3n. which recursive formula represents the same sequence of numbers?
victus00 [196]

Answer:

c is your answer!!!!

Step-by-step explanation:

5 0
3 years ago
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