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Sati [7]
4 years ago
12

What number should be added to the expression x2 + 2x to change it into a perfect square trinomial?

Mathematics
2 answers:
blondinia [14]4 years ago
6 0
1. In this way you get x^2+2x+1 which is (x+1)^2.
inysia [295]4 years ago
4 0
D 4
d4 
D4
D   4
D:4
nubiuhbj
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Find the midpoint of the line segment.
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It would be (6,9) from the given end point to the given middle point it is a 7 point difference, so we add 7 to the y value to get the other endpoint, hope it helps!
8 0
4 years ago
What is the solution of the equation y=2x-7;y=5x+4
Reika [66]

Step-by-step explanation:

y = 2x - 7...(1) \\ y = 5x + 4...(2) \\ from \: equations \: (1) \: and \: (2) \\ 5x + 4 = 2x - 7 \\   \therefore \: 5x - 2x =  - 7 - 4 \\  \therefore \: 3x =  - 11\\   \huge \red{ \boxed{\therefore \: x =  -   \frac{11}{3} }}\\  substitutig \: x =  -   \frac{11}{3} in \: equation \: (1) \\ y = 2 \times (-   \frac{11}{3}) - 7 \\  \\ \therefore \: y =  -  \frac{22}{3}  - 7 \\  \\  \therefore \: y =   \frac{ - 22 - 21}{3} \\  \\  \huge \orange{ \boxed{\therefore \: y =   - \frac{ 43}{3}}}\\\\(x, \:y) = \{-   \frac{11}{3}, - \frac{ 43}{3}\} \:

4 0
3 years ago
PLEASE help! Quickly please. I'll give as many points as I can!
nignag [31]

Answer:

x=55

a=11.47

Step-by-step explanation:

To find x we add all the angles in the triangle.  The three angles in a triangle add to 180 degrees

35+x+90 = 180

Combine like terms

125+x=180

Subtract 125 from each side

125-125+x=180-125

x= 55

To find a

sin 35 = opposite side/ hypotenuse

sin 35 =a/20

Multiply each side by 20

20sin35 =a

11.47152873 =a

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3 years ago
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