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Komok [63]
3 years ago
5

Heeeelllpppssss pleeaassee.....…………

Mathematics
1 answer:
Kay [80]3 years ago
8 0

Answer:

x= -8     x=2

Step-by-step explanation:

x^2 +6x - 6 = 10

Subtract 10 from each side

x^2 +6x -16 =0

Factor  what 2 numbers multiply to -16 and add to 6

8*-2 = -16

8-2 = 6

(x+8) (x-2) =0

Using the zero product property

x+8 =0    x-2 =0

x= -8     x=2

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Given: △DMN, DM=10 3 m∠M=75°, m∠N=45° Find: Perimeter of △DMN
OlgaM077 [116]

Angle D is 180° -75° -45° = 60°. Drawing altitude MX to segment DN divides the triangle into ΔMDX, a 30°-60°-90° triangle, and ΔMNX, a 45°-45°-90° triangle. We know the side ratios of such triangles (shortest-to-longest) are ...

... 30-60-90: 1 : √3 : 2

... 45-45-90: 1 : 1 : √2

The long side of ΔMDX is 10√3, so the other two sides are

... MX = MD(√3/2) = 15

... DX = MD(1/2) = 5√3

The short side of ΔMNX is MX = 15, so the other two sides are

... NX = MX(1) = 15

... MN = MX(√2) = 15√2

Then the perimeter of ΔDMN is ...

... P = DM + MN + NX + XD

... P = 10√3 +15√2 + 15 + 5√3

... P = 15√3 +15√2 +15 . . . . perimeter of ΔDMN

5 0
3 years ago
Someone plz help me with These questions :u have to solve for x and show work
irakobra [83]
Ok so the first one is 
1.x=135
2.x=-23
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5 0
3 years ago
Evaluate -5 - 15 + 4 + 15
dexar [7]

Answer:

Step-by-step explanation:

-5+-15= -20

4+15= 19

-20+19

-1

7 0
3 years ago
Read 2 more answers
How do I solve for the solution??<br>y = 3x +2<br>y = x + 1​
Elis [28]

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:

(−1/2,1/2)

Equation Form:

x=−1/2,y=1/2

Step-by-step explanation:

7 0
3 years ago
Please help and thanks!
Leokris [45]

Answer:    D: 17.3

Step-by-step explanation:

I believe its D because the house and the ground is a 90 degree angle, and at 60 degree angle is a 20 foot ladder. alright then 90 plus 60 = 150 degrees.

then add the twenty foot ladder with each choice for the answer:

A: 20 + 6.1 = 26.1

B: 20 + 10.0 = 30

C: 20 + 14.1 = 34.1

D: 20 + 17.3 = 37.3

The answer would be D because it is the closer number to 150. Because it says " which is the closest height up the house the ladder reaches?" The answer is D the closest number. I HOPE THIS HELPS YOU! =D

4 0
3 years ago
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