3 years ago

Can someone help me with this problem

Mathematics

1 answer:

Ray Of Light [21]3 years ago

8 0

(f/g)(x)
2x + 1
= ------------- , x ≠ + - √7
x^2 - 7

Answer is C.

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Solve. 1 3/4 + 7/8 = 2 1/4 3 1/2 2 3/8 2 5/8

antoniya [11.8K]

Answer:

2 5/8

Step-by-step explanation:

1 3/4 as a decimal is 1.75 and 7/8 as a decimal is equal to .875 add those together and you get 2.625 which is equal to 2 5/8

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3 years ago

Find an equation of the circle that has center (-4,3) and passes through (6,-4).

kumpel [21]

Answer:

$(x+4)^2+(y-3)^2=149$

Step-by-step explanation:

The equation of a circle is $(x-h)^2+(y-k)^2=r^2$ where $(h,k)$ is the center of the circle and $r$ is the radius of the circle.

Given that $(h,k)\rightarrow(-4,3)$ and it passes $(6,-4)$ , their distance between each other must the radius of the circle, so we can use the distance formula to find the radius:

$d=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}\\\\d=\sqrt{(-4-3)^2+(6-(-4))^2}\\\\d=\sqrt{(-7)^2+10^2}\\\\d=\sqrt{49+100}\\\\d=\sqrt{149}$

Therefore, if the length of the radius is $r=\sqrt{149}$ units, then $r^2=149$ , making the final equation of the circle $(x+4)^2+(y-3)^2=149$

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3 years ago

Find the derivative of f(x) = -2x2 + 11x at x = 9. a) -25 b) -243 c) 63 d) 19

MissTica

$\bf f(x)=-2x^2+11x\implies \left. \cfrac{df}{dx}=-4x+11 \right|_{x=9}\implies -4(9)+11\implies -25$

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4 years ago

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Find the area of a triangle with the base of 15.5 cm and the height of 12.2cm

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94.55

Step-by-step explanation:

(hb)/2

(15.5x12.2)/2

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4 years ago

Y= Two thirds x minus 3

kap26 [50]

Slope: 2/3
y-intercept: -3

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3 years ago