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3 years ago

How many solutions does this quadratic equation have ? y=x^2-8x-20

Mathematics

1 answer:

Pani-rosa [81]3 years ago

7 0

Answer: y=x+2 or x-10

Step-by-step explanation:

Y=x2-8x-20

Quadratic equation

Variables of -20 that will give -8 are

-10 &+2

Substitute into the equation

Y=x2-10x+2x-20

Y=x(x-10)+2(x-10)

Y=(x+2)(x-10)

The two equations are

Y=x+2 or

Y=x-10

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Steven, Linda, and Elliott check their lunch

zhuklara [117]

Answer:

Steven, Elliot, Linda

Step-by-step explanation:

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3 years ago

Solve the inequality and graph <br>2(-6n-5)<-3(4n+2)<br>thanks!

Mekhanik [1.2K]

Answer:

All real numbers are solution for the inequality.

Step-by-step explanation:

Given expression:

$2(-6n-5)$

Solving the inequality.

Using the distribution.

$(2(-6n))+(-2(-5)$

$-12n-10$

Adding $12n$ to both sides.

$-12n+12n-10$

We have,

$-10$

The above statement is always true and thus the inequality has all real number solutions.

The number line graph for the inequality can be shown.

7 0

4 years ago

HELP BEFORE TOMORROW PLZZZ (show how to solve it plz)

Zepler [3.9K]

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6 0

3 years ago

A surf shop rents surfboards and charges x dollars for one rental day. it gives a discount for a weekly seven day rental and onl

Artyom0805 [142]

A. The shop charges $8.517 for a one-day rental

B. The shop charges $42.857 for a weekly rental.

Step-by-step explanation:

Step 1; The shop charges $x for a one-day rental and $5x for a weekly rental. Assume $x = a and $5x = b, from this we can write,

5a = b, take this as equation 1.

Step 2; The shop had a total sale of $600 by renting 20 boards for a one-day rental and 10 boards for a weekly rental. So,

20a + 10b = 600, take this as equation 2.

Substituting equation 1 in 2, we get

20a + 10 (5a) = 600,

20a + 50a = 600, a = 600 / 70,

a = $8.5714.

From equation 1, 5a = b,

5 × $8.5714 = b,

b = $42.857.

So for a one-day rental, the shop charges $8.5714 and for a weekly rental it charges $42.857.

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3 years ago

A gardener is planting two types of trees:

Nikitich [7]

9 + 13x = 6 + 19x since x is same variable (year)
9 - 6x = 6
-6x = -3
x = 1/2 yr or 6 months

3 0

4 years ago