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3 years ago

If g(x) = - 2x² - 5x + 7, then what is the value of g(-2)?

Mathematics

1 answer:

uranmaximum [27]3 years ago

5 0

Answer:

16 + 10 + 7, which equals 33

Step-by-step explanation:

g(-2) means you need to replace all x's in the equation with -2. So the equation becomes:

-2(-2)^2 - 5(-2) + 7, which equals 16 + 10 + 7, which equals 33

Hope this helps!

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Llana [10]

Answer:

157.5 square feet

Step-by-step explanation:

If an inch is 3 feet, then

3.5 inches = 10.5 feet (3.5*3)

5 inches = 15 feet (5*3)

The area of a rectangle is length times width so...

10.5*15 = 157.5

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3 years ago

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Step-by-step explanation:

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If (-1,4) and (3,-2) are end points of diameter of the circle, then the equation of the circle is

Volgvan

Answer:

If you've more doubts you can ask :)

Step-by-step explanation:

If the centre of a circle is (a, b) and radius r, then the equation of the circle is :

$(x - x)^2 + (y-b)^2 = r^2$

First we will find the centre, (a , b):

$a = \frac{3+(-1)}{2} = \frac{2}{2} = 1\\\\b = \frac{-2 + 4}{2} = \frac{2}{2} = 1$

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$Radius, r = \frac{Diameter}{2}$

Diameter is the distance between (-1, 4) and (3, -2)

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$= \sqrt{(3-(-1)^2 + (-2-4)^2} \\\\=\sqrt{16 + 36}\\\\=\sqrt{52}\\\\=\sqrt{4 \times 13}\\\\=2\sqrt{13} \ units$

Therefore , $r = \frac{2 \times \sqrt{13} }{2} = \sqrt{13} \ units$

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3 years ago

What is the answer to 5(p+6)=8p

Alekssandra [29.7K]

$5\left( p+6 \right) =8p\\ \\ 5p+30=8p\\ \\ 8p-5p=30$

$\\ \\ 3p=30\\ \\ \frac { 1 }{ 3 } \cdot 3p=\frac { 1 }{ 3 } \cdot 30\\ \\ p=10$

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Anni [7]

The answer is (x+3)(x+5).

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3 years ago