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3 years ago

Factor the following equation to find its zeros.

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

6 0

Answer:

A| 12, 3

Step-by-step explanation:

The polynomial can be factored by looking for factors of 36 that sum to -15. The sum being negative while the product is positive means both factors will be negative. The answer choices suggest ...

y = (x -12)(x -3)

A quick check shows this product is ...

y = x^2 -12x -3x +36 = x^2 -15x +36 . . . . as required

The factors are zero when x is either 12 or 3.

The zeros of the equation are 12 and 3.

____

Once you realize the constants in the binomial factors both have a negative sign, you can immediately choose the correct answer (A).

Or, you can use Descartes' rule of signs, which tells you that the two sign changes in the coefficients (+-+) mean there are 2 positive real roots.

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Whole-wheat bread costs $2.06/lb. How much would 3.8 lb of whole-wheat bread cost?

Xelga [282]

Whole-wheat bread = $2.06/lb

We need the cost of 3.8 lbs of whole-wheat bread.

So, we simply need to multiply the cost with the amount needed.

(cost per pound) × (amount of bread)

($2.06) × (3.8)

Simplify.

$7.828

Round to the nearest tenths.

$7.83

So, 3.8 pounds of whole wheat bread costs $7.83

~Hope I helped!~

7 0

3 years ago

Read 2 more answers

Which inequality is true when the value of R is 18? I'ma shower the answers i can choose in the picture

musickatia [10]

Answer:

See below:

Step-by-step explanation:

Hello! We can check to see if the inequality is true by replacing r with 18 as we have been told to find them in which 18 as r makes the equation true.

So our equations to test for are:

$-r-3>-6\\-r+3$

We can input 18 as r and then we see the following are correct:

1. No, as a -21 is not greater than -6

2. Yes, as -15 is less than 6.

3. No, as 21 is not greater than 6

4. No, as -15 is not greater than 6.

Cheers!

7 0

2 years ago

What is the inverse function of y=x^2-7

Vikentia [17]

With inverse functions you just swap 'x' and 'y' and solve for 'y'.

$\sf y=x^2-7$

Swap 'x' and 'y':

$\sf x=y^2-7$

Add 7 to both sides:

$\sf x+7=y^2$

Take the square root of both sides:

$\sf y=\boxed{\sf\pm\sqrt{x+7}}$

3 0

2 years ago

Round to the nearest thousandth: 6.49993

zavuch27 [327]

Answer:

6.5

What is the Nearest 1000th?

Nearest thousandth is the third digit after the decimal point.

How to Calculate Rounding to the Nearest 1000th?

If the digit after thousandth is greater than or equal to 5, add 1 to thousandth. Else remove the digit. Example

124.5864

The fourth digit of right of decimal point is 4 which less than 5

So remove fourth digit

Result = 124.586

Step-by-step explanation:

Hope that helped

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3 years ago

BRAINLIEST IF CORRECT!:)) PLEASE SHOW WORK!! <br><br> Here is the attachment below.:) <----

kipiarov [429]

Please find the solution below.. If you have questions, let me know.

6 0

3 years ago