3 years ago

HELP PLEASE URGENTTT!!!!!

Mathematics

1 answer:

Nina [5.8K]3 years ago

8 0

Answer:

I believe the answer is x = 3

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What quadratic formula do I need to use to solve 3x(x+6)=-1

timofeeve [1]

Answer:

$\Large \boxed{x_1=\frac{9+\sqrt{51} }{3} \ \ ; \ \ x_2=\frac{9-\sqrt{51} }{3} }$

Step-by-step explanation:

$\displaystyle \Large \boldsymbol{} 3x(x+6)=-10 \\\\3x^2+18x=-10 \\\\3x^2+18x+10=0 \\\\D=324-120=204 \\\\ x_{1;2}=\frac{18\pm2\sqrt{51} }{6} =\frac{9\pm\sqrt{51} }{3}$

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3 years ago

Calculate the area of triangle ABC with altitude BD, given A (−6, 0), B (0, 0), C (0, 6), and D (−3, 3).

nata0808 [166]

Answer:

18 unit²

Step-by-step explanation:

If BD is altitude then AC is the base.

The length of AC is:

AC = $\sqrt{6^2+6^2} = 6\sqrt{2}$

The length of BD is:

BD = $\sqrt{3^2 + 3^2} = 3\sqrt{2}$

The area is:

A = 1/2bh
A = 1/2 * $6\sqrt{2} *3\sqrt{2}$ = 18 unit²

4 0

3 years ago

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Which equation represents the vertex form of the equation y=x^2-12x+38

mr_godi [17]

Answer:

y=(x-6)^2+2 Have a nice day

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3 years ago

--2m + 4n2 for m = -6 and n=-5 Evaluate the expression

Tamiku [17]

Answer: 112

Step-by-step explanation:

Since we were given m and n, we plug them into the expression and solve.

-2(-6)+4(-5)² [exponent]

-2(-6)+4(25) [multiply]

12+100 [add]

112

Now, we know that the value of the expression is 112.

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3 years ago

A hungry lion is looking for food. It went 5 miles (mi) before it spotted a zebra to stalk. It took this lion 0.2 hours to get t

MariettaO [177]

Given:
distance = 5 miles
time = 0.2 hours
speed = ?

Speed = distance / time

Speed = 5mi / 0.2hrs = 25mph

The speed of the lion is 25 miles per hour.

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3 years ago