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stepan [7]
3 years ago
13

need help.    solve for y.  try factoring first if not possible or difficult use quadratic formula.               y²-6y+6=0

Mathematics
2 answers:
shutvik [7]3 years ago
6 0
y^2-6y+6=0\\
y^2-6y+9-3=0\\
(y-3)^2=3\\
|y-3|=\sqrt3\\
y-3=\sqrt3 \vee y-3=-\sqrt3\\
y=3+\sqrt3 \vee y=3-\sqrt3
lbvjy [14]3 years ago
3 0
y^2-6y+6=0\\ \\a=1 , \ b=-6, \ c=6 \\ \\\Delta =b^2-4ac = (-6)^2 -4\cdot1\cdot6 = 36-24=12\\ \\\sqrt{\Delta }= \sqrt{12}=\sqrt{4\cdot 3}=2\sqrt{3} \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{6-2\sqrt{3}}{2 }=\frac{2( 3- \sqrt{3})}{2}= 3- \sqrt{3}

x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{6+2\sqrt{3}}{2 }=\frac{2( 3+ \sqrt{3})}{2}= 3+ \sqrt{3}
 

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kotykmax [81]

Answer:

4. 8.0

5. 27.6

6. 35.5 degrees

Step-by-step explanation:

#4- Cos 48= x/12

0.669131= x/12

x=8.0

#5

Sin 78= 27/x

0.978=27/x

0.978x=27

x=27.6

#5

Tan X= 15/21

tan x= .714

inverse tan= 35.5 degrees

6 0
3 years ago
the Firefighter ladder of the length 17 was kept at the at a distance of 8 metres from the building to reach the window of the b
Andre45 [30]

Answer:

The answer is 15 units hope that helps

Step-by-step explanation:

Apply pythagorean formulae here

Take the 17 as hypotenuse... And 8 as the base....

So the pythagorean formulae is

( hypotenuse) Square = (height) Square + (base) Square......

Hence put the values and the height comes as 15 units

BTW are u Indian?...

6 0
2 years ago
Read 2 more answers
What is wrong in this
il63 [147K]
Step 3 is wrong ( = 1/10 pound x 1/10 pound )
7 0
3 years ago
A circular fountain has a diameter of 8 feet there is a flower garden planted around the fountain. if the garden extends 12 feet
LuckyWell [14K]

Answer:

753.98 square feet

Step-by-step explanation:

Diameter of the fountain =8 inches

  • Therefore Radius of the fountain, =8/2=4 Inches

The flower garden extends 12 feet beyond the fountain, therefore:

  • Radius of the flower garden=4+12 =16 Inches

Let the fountain be the inner circle with radius r and the larger circle which includes the garden have a radius, R. Then:

Area of the flower garden =\pi (R^2-r^2)

=\pi (16^2-4^2)\\=240\pi\\=753.98$ square feet

7 0
2 years ago
A farmer's land is separated into sections of size 2 1/3
wariber [46]

Answer:

9.29 acres

Step-by-step explanation:

2 2/7 = 15/7

4 1/3 = 13/3

(15/7) * (13/3) = 195/21 = 9.29 acres

7 0
3 years ago
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