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3 years ago

Use factoring to find the zeros. x2 - 9x – 36 = 0

Mathematics

1 answer:

3241004551 [841]3 years ago

4 0

Answer: x=12, x=-3

Step-by-step explanation: For this factored problem, you see that -36 is negative, as well at -9. This shows you that you need to find two numbers that multiply to get -36, and add up to get -9. Two numbers that both satisfy these requirements are -12 and 3. They multiply to get -36, and add to get -9.

Once you have found your values, you plug them into (x+/- __)(x+/- __), which is (x-12)(x+3).

But since the problem asks you to find the zeroes, you set each factor equal to zero, like this:

x-12=0 and x+3=0

Then solve and you have you answer!

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In math how do you estimate?

shusha [124]

For example, if you are asked to estimate the sum of 545 + 723, you have to round the two numbers to the hundreds, so 545 would equal 500 and 723 would equal 700

500 + 700 = 1200, which wud be the estimation f the sum

5 0

3 years ago

Brooke is flying a kite while standing 50 m from the base of a tree at the park. Her Chi is directly above the 10 m tree in the

Gelneren [198K]

Answer:

104.127 m

Step-by-step explanation

In the question instead of chi, it would be kite.

Given: Distance of Brooke from the base of tree is 50 meters.

The kite is directly above the 10 m tree in the 125 m string is fully extended.

Lets assume the height of the kite be "x".

Its making the Right angle triangle with length of string as hypotenuse, height of kite above tree.

Using Pythagorean formula:

h²= a²+b²

⇒ $125^{2} = 50^{2} + (x)^{2}$

⇒ $15625 = 2500+ (x)^{2}$

⇒ $15625 = 2500+ x^{2}$

Subtracting both side by 2500

⇒ $13025 = x^{2}$

Square rooting both side, we know√a²=a

⇒ $\sqrt{13025} =x$

∴ x= 114.127 meter.

Next, we know the value of x include the height of tree.

∴ Height of kite flying above tree= $x-10\ m$

⇒ Height of kite flying above tree= $114.127-10= 104.127\ m$

Hence, the height of kite above the tree is 104.127 meters.

3 0

3 years ago

In last night’s baseball game, there were 4 walks and 15 hits. Express the ratio of walks to hits, written in three different wa

Vlad1618 [11]

Word form: 4 to 15

Fraction form: 4/15

Ratio form: 4:15

5 0

3 years ago

Which is a sum of cubes?<br> a a³ + 18<br> b a +9<br> c a² + 16<br> d a¹2 +8

lapo4ka [179]

Answer:

a³ + 18

Explanation:

The formula for cube volume is to cube the side meaning multiply the side by itself 3 times. Adding 18 could just be the other side, so this method would be the most correct.

7 0

2 years ago

Please answer please

Mariulka [41]

Answer:

that's wrong

Step-by-step explanation:

so yesThese icons are frequently found in the Quick Launch area. (Choose all that apply) Show Desktop icon My Documents directory Recycle Bin Windows Media Player Internet Explorer. best new y jk lol idk what that is XD

6 0

3 years ago