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NISA [10]
3 years ago
14

Which equation results from taking the square root of both sides (x-9)^2=81

Mathematics
2 answers:
dezoksy [38]3 years ago
7 0
(x-9)^2=81\\\\\sqrt{(x-9)^2}=\sqrt{81}\\\\|x-9|=9\iff x-9=9\ \vee\ x-9=-9\ \ \ |+9\\\\x=19\ \vee\ x=0
mestny [16]3 years ago
3 0
\bf (x-9)^2=81\implies \sqrt{(x-9)^2}=\sqrt{81}\implies x-9=\pm \sqrt{81}
\\\\\\
x-9=\pm 9\implies x=\pm 9+9
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Write the equation of the circle graphed below.
Darina [25.2K]

Answer:

Your equation is (x - 1)^2 + (y +1)^2 = (\frac{1}{2}  )^2

Step-by-step explanation:

Well, the center origin of the circle is given (h,k) =  (1,-1).

We have to find our radius as they gave us a point. from origin to the edge of the circle.

Using the formula: (x - h)^2 + (y - k)^2 = r^2

Plug in our (h,k) = (1,-1) and (x,y) =  (0.5,-1) to solve for radius.

(x - h)^2 + (y - k)^2 = r^2

(0.5 - (1))^2 + (-1 - (-1))^2 = r^2

(-0.5)^2 + (0)^2 = r^2

1/4= r^2

r^2 = 1/4

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6 0
2 years ago
If BE−→− bisects ∠ABD and m∠ABD = 66°, find m∠ABE
Monica [59]

Answer:

m∠ABD = 132 °

Step-by-step explanation:

m∠ABE = m∠DBE

and

m∠ABD = m∠ABE + m∠DBE

Because m∠ABE = 66°, therefore m∠DBE = 66°, so that

m∠ABD = 66° + 66° = 132°

4 0
4 years ago
Simplified?
kap26 [50]

Answer:

Option B

Step-by-step explanation:

Given the following question:

In order to find the answer, we need to convert the scientific notation into standard notation and then simplify by subtracting the decimals. Then we convert the standard notation back into scientific notation.

0.0007 - (4.9\times 10^{-7} )
4.9\times10^{-7} =0.00000049
0.0007-0.00000049
0.0007-0.00000049=0.00069951
=0.00069951
0.00069951=6.9951 \times10^{-7}
=6.9951 \times10^{-7}

Your answer is "6.9951 × 10^-7" or option B.

Hope this helps.

3 0
2 years ago
How 2 find intercept
Zarrin [17]
You can look at the graph and see where the point crosses the y - axis for the y-int and for the x-int you look to see where the point crosses the x-axis. The coordinate with always have a coordinate of zero.
8 0
3 years ago
What is the distance between (-6, 2) and (8, 10) on a coordinate grid?
lawyer [7]

Answer:

The answer is 2(the square root of 65 )

Step-by-step explanation:

Plug ( -6, 2) and (8, 10) into the distance formula and solve.

Distance = the square root of ((x2 - x1)^2 + (y2 - y1)^2))

Distance = the square root of ((8 - -6)^2 + (10 - 2)^2))

Distance = the square root of (14^2 + 8^2)

Distance = the square root of (196 + 64)

Distance = the square root of 260 which can be simplified to 2(the square root of 64)

5 0
4 years ago
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