Solve equation using square root property X2-8X+16=1

1 answer:

7 0

X^2-8x+16=1\\ \\x^2-8x+16-1=0\\ \\x^2-8x+15=0\\ \\\Delta = b^{2}-4ac = (-8)^{2}-4*1*15=64-60=4 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{8- \sqrt{4}}{2}=\frac{8-2}{2}= \frac{6}{2}=3\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{8+ \sqrt{4}}{2}=\frac{8+2}{2}= \frac{10}{2}=5\\ \\Answer : x=3 \ \ or \ \ x = 5

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astraxan [27]

Divide both sides by 2pi
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6 0

4 years ago

Please help! Correct answer only, please! I need to finish this assignment this week. What are the dimensions of the matrix show

Katena32 [7]

Answer:

3 x 5

Step-by-step explanation:

The dimension of a matrix is normally represented in form of:

<u>number of rows</u> x <u>number of columns</u>

In the given matrix, there are 3 rows and 5 columns.

=> The dimension of this matrix is 3 x 5

=> Option D is correct

Hope this helps!

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3 years ago

What is the equation of the line that is perpendicular to line a and passes through (2,7).

Aleonysh [2.5K]

Answer:

y = x + 5

Step-by-step explanation:

Slope = - 1

Slope of the perpendicular line = 1

Point (2,7)

(b) y-intercept= 7 - (1)(2)

= 5

7 0

3 years ago

Help plz:)))I’ll mark u Brainliest

Zina [86]

Answer:

Bee is correct .

Step-by-step explanation:

AI thought that while proving congruent , he/she need to look at the closest side.This thinking is wrong.

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3 years ago

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butalik [34]

Answer:

Step-by-step explanation:

If the sine of an angle is equal to the cosine of an angle, that means that the sides adjacent and opposite to that angle are equal. One triangle that has two equal sides is an isosceles triangle. We can set this triangle to be a 45-45-90 degree triangle, which means that the angle would be 45.

Now, we have to find the value of

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