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3 years ago

X squared plus 10x plus 9 equals 0

Mathematics

1 answer:

snow_lady [41]3 years ago

4 0

That is a quadratic equation. To find its square, think of two numbers that when multiplied, the answer would be the last term, constant 9 and if those two numbers are added, the answer would be the middle term, the constant 10 with variable x. These are positive integers 9 and 1, respectively.

(x² + 10 x + 9) = 0
= (x + 9 ) (x + 1)

Using the FOIL method to check, the square is equal to the quadratic equation.

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3 years ago

Solve y = −23(x + 9) + 4 for x when y = 0.

Vlad [161]

Answer:

x = -203/23

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Step-by-step explanation:

Step 1: Define

Identify

y = -23(x + 9) + 4

y = 0

Step 2: Solve for x

Substitute in y: 0 = -23(x + 9) + 4
[Subtraction Property of Equality] Subtract 4 on both sides: -4 = -23(x + 9)
[Division Property of Equality] Divide -23 on both sides: 4/23 = x + 9
[Subtraction Property of Equality] Subtract 9 on both sides: -203/23 = x
Rewrite: x = -203/23

3 0

3 years ago

Read 2 more answers

Use a calculator to find the value of the trigonometric function to four decimal places. Tan 3.4??? A.0.2555 B.0.0594 C.0.9668 D

r-ruslan [8.4K]

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Tangent or Tan is one of the trigonometry functions. It represents TOA in the sohcahtoa mnemonic which means Tan = Opposite / Adjacent

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3 years ago

An online store store uses the following model to sell sneakers to its customers:

r-ruslan [8.4K]

Answer:

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Step-by-step explanation:

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2 years ago

There are 24 adults and 30 children at a science museum

vovikov84 [41]

Okay so let’s start by figuring what the total number of people is. To get that we add 24 and 30.
24+30= 54
So we have a total of 54 people.
Now, how many children are there?
30 children... which means the ratio is 30:54

Thirty children to fifty four people total at the museum.

Hope this helps!
Contact me if you have any more questions or concerns.

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3 years ago