Please help 20 points

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

3 0

She can drive 571.4 miles with 22.8 gallons of gas

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What is the value of the expression

Levart [38]

Answer:

$\boxed{\sf -2}$

Step-by-step explanation:

$\sf Evaluate \: - {x}^{2} - 4x - 6 \: where \: x = - 2: \\ \sf \implies - {x}^{2} - 4x - 6 = - {( - 2)}^{2} - 4( - 2) - 6 \\ \\ \sf {( - 2)}^{2} = 4 : \\ \sf \implies - \boxed{ \sf 4} - 4( - 2) - 6 \\ \\ \sf - 4( - 2) = 8 : \\ \sf \implies - 4 + \boxed{ \sf 8} - 6 \\ \\ \sf - 4 + 8 - 6 = 8 - (4 + 6) : \\ \sf \implies 8 - (4 + 6) \\ \\ \sf 4 + 6 = 10 : \\ \sf \implies 8 - \boxed{ \sf 10} \\ \\ \sf \implies - 2$

5 0

4 years ago

HELP, QUICK.

aev [14]

Y=ab^2 + bx + c

That’s the equation

4 0

3 years ago

Thank you, will give brainliest.

slamgirl [31]

(7,6) is the answer of your question
Please mark as brainiest

4 0

3 years ago

a certain shade of blue is made by mixing 1.5 quarts of blue paint with 5 quarts of white paint. If you need a total of 16.25 ga

Law Incorporation [45]

we know the blue and white paints are on a 1.5 : 5 ratio, thus, if we have a total of 16.25 gallons of paint to be split along that ratio, we can simply divide 16.25 by (1.5+5) and distribute accordingly.

$\bf \cfrac{blue}{white}\qquad \stackrel{ratio}{1.5:5}\qquad \cfrac{1.5}{5}~\hspace{5em}\cfrac{1.5\cdot \frac{16.25}{1.5+5}}{5\cdot \frac{16.25}{1.5+5}}\implies \cfrac{1.5\cdot \frac{16.25}{6.5}}{5\cdot \frac{16.25}{6.5}} \\\\\\ \cfrac{1.5\cdot 2.5}{5\cdot 2.5}\implies \cfrac{3.75}{12.5}\qquad \qquad \boxed{\stackrel{blue}{3.75}~:~\stackrel{white}{12.5}}$

5 0

3 years ago

A garden is in the shape of a square with a perimeter of 48 feet.The garden is surrounded by two fences.One fence is around the

ikadub [295]

Answer:

the outside fence has a 64 feet perimeter

8 0

3 years ago

Please help 20 points ​

Please help 20 points