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3 years ago

Find the zeros of the function y=x^2-1

Mathematics

1 answer:

scoundrel [369]3 years ago

7 0

Answer: 1, -1

Step-by-step explanation: This is a difference of squares when factored,

(x+1)(x-1)

Let's check using FOIL(First, outside, inside, last)

x * x =x^2

1 *x =x

x * (-1) =-x

1* -1 =-1

so x^2 +x -x -1

=x^2 -1

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What is the product of 4/5x2 3/4 written in simplest form

IRISSAK [1]

First, you convert 2 3/4 to a improper fraction, which is 11/4. Then you multiply 4/5 with 11/4, after you cross simplify the fractions, you can multiply 1/5 with 11/1, which equals 2 1/5. Hope can help you a little bit. :)

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4 years ago

An equation is shown below:

gayaneshka [121]

6(2x-11)+15=3x+12 Given
12x-66+15=3x+12 Distribution
12x-51=3x+12 Combine like terms
12x=3x+63 addition
9x=63 subtraction
x=7 division

the value of x that makes the equation true is 7.

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3 years ago

How can you use regrouping to solve the equation 32-5 =

Doss [256]

Answer:

-5+32=27

Step-by-step explanation:

-5+32=27

Hope I helped!

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3 years ago

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Hello can some one help with with a question?

marin [14]

Answer:

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3 years ago

Mr Oneill bought cheese, turkey slices and wheat rolls for $55. The ratio of the amount of money spent on cheese to the amount o

astra-53 [7]

Answer:

Mr. O'neill buy 33 turkey slices.

Step-by-step explanation:

Firstly let us denote amount of money spent on Cheese by the symbol C.

amount of money spent on Turkey by the symbol T.

amount of money spent on Wheat by the symbol W.

Now we are the ratio of amount of money spent on cheese to the amount of money spent on turkey slices as 2:3 ;

We can represent this as $\frac{C}{T}$ = $\frac{2}{3}$

The ratio of the amount of money spent on cheese to the amount of money spent on wheat rolls is 6:5 ;

We can represent this as $\frac{C}{W}$ = $\frac{6}{5}$

Now we will make C also 6 in the first ratio to represent similarity in ratios i.e. $\frac{C}{T}$ = $\frac{2 * 3}{3 * 3}$ = $\frac{6}{9}$

So, the ratio of amount of money spent on cheese to the amount of money spent on turkey slices to the amount of money spent on wheat rolls is represented by 6 : 9 : 5.

To find the amount of money spent on turkey slices = $\frac{9}{6+9+5} * $55$ = $24.75

Since cost of each turkey slice cost = $ 0.75

Therefore, Cost of each turkey slice * Number of turkey slices = Total amount of money spent on turkey slices

$0.75 * Number of turkey slices = $24.75

Therefore, Number of turkey slices that Mr. O'neill buy = $24.75/$0.75

= 33 slices.

4 0

3 years ago