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Mumz [18]
2 years ago
14

x2 – 144 = 0 (what formula did you use besides calculator or quadratic formula ) show work on how you solved plz :D (put down 26

pts)
Mathematics
2 answers:
Harrizon [31]2 years ago
4 0
X^2 = 144
sqrt(x^2) = sqrt(144)
x = 12

Square root formula? It’s not really a formula though.
SVEN [57.7K]2 years ago
3 0
2X - 144 = 0
+ 144. + 144
2X = 144
/2. /2.
X = 72
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The isosceles triangle below has one angle measure as shown what is the measure of each of the other angles?
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The answer would be 65°.
This is because 180° -50° equals 130°. And 130° divided by two equals 65°. The two remaining angles must be equal because it is an isosceles triangle.
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3 years ago
Find the absolute maximum and absolute minimum values of the function f(x, y) = x 2 + y 2 − x 2 y + 7 on the set d = {(x, y) : |
dsp73

Looks like f(x,y)=x^2+y^2-x^2y+7.

f_x=2x-2xy=0\implies2x(1-y)=0\implies x=0\text{ or }y=1

f_y=2y-x^2=0\implies2y=x^2

  • If x=0, then y=0 - critical point at (0, 0).
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The latter two critical points occur outside of D since |\pm\sqrt2|>1 so we ignore those points.

The Hessian matrix for this function is

H(x,y)=\begin{bmatrix}f_{xx}&f_{xy}\\f_{yx}&f_{yy}\end{bmatrix}=\begin{bmatrix}2-2y&-2x\\-2x&2\end{bmatrix}

The value of its determinant at (0, 0) is \det H(0,0)=4>0, which means a minimum occurs at the point, and we have f(0,0)=7.

Now consider each boundary:

  • If x=1, then

f(1,y)=8-y+y^2=\left(y-\dfrac12\right)^2+\dfrac{31}4

which has 3 extreme values over the interval -1\le y\le1 of 31/4 = 7.75 at the point (1, 1/2); 8 at (1, 1); and 10 at (1, -1).

  • If x=-1, then

f(-1,y)=8-y+y^2

and we get the same extrema as in the previous case: 8 at (-1, 1), and 10 at (-1, -1).

  • If y=1, then

f(x,1)=8

which doesn't tell us about anything we don't already know (namely that 8 is an extreme value).

  • If y=-1, then

f(x,-1)=2x^2+8

which has 3 extreme values, but the previous cases already include them.

Hence f(x,y) has absolute maxima of 10 at the points (1, -1) and (-1, -1) and an absolute minimum of 0 at (0, 0).

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3 years ago
Express the area of the entire rectangle.
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3 years ago
Inverse of the function f(x) = 2x + 5?
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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2) <u>Use </u><u>y</u><u>=mx+</u><u>c</u>

<u>by </u><u>using </u><u>the </u><u>point </u><u>(</u><u>3</u><u>,</u><u>4</u><u>)</u>

<u>4</u><u>=</u><u>1</u><u>(</u><u>3</u><u>)</u><u>+</u><u>c</u>

<u>4</u><u>=</u><u>3</u><u>+</u><u>c</u>

<u>c=</u><u>1</u>

3) <u>The </u><u>answer</u>

y=x+1

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