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4 years ago

8. Write the quadratic formula

Mathematics

1 answer:

Aleonysh [2.5K]4 years ago

4 0

Answer: Formula= x^2 - 2x - 8

Roots=(-2 , 0) (4 , 0)

Step-by-step explanation:

1.) find the equation (the formula is Ax^2 + Bx + C, so plug it in)

2.)Plug it into your calculator's Y= X^2 - 2X - 8 (if you have one)

3.)Press 2nd, Calc, 2

4.)Go to the X Intersect , it will say Left Bound at the bottom left corner

5.)Press the left arrow about 3 or 4 times, hit enter

6.) It will now say Right Bound in the same corner go back to the X intersect, now press the right arrow 3 or 4 times

Repeat steps 3 to 6 for the other X intersect.

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A train arrives at a stop every 30 minutes and stays there for 6 minutes. What is the probability that the train will be at your

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30+6 = 36, 6/36 = 1/6, the probability is 16.66 %

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3 years ago

16. Solve for C: 6c - 1 - 4c = -49

lesantik [10]

Answer:

c = -24

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
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Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
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Algebra I

Step-by-step explanation:

Step 1: Define

6c - 1 - 4c = -49

Step 2: Solve for c

Combine like terms: 2c - 1 = -49
Isolate c term: 2c = -48
Isolate c: c = -24

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3 years ago

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Diano4ka-milaya [45]

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3 years ago

Factor the expression 30a+35

kherson [118]

<h3>Answer is 5(6a+7)</h3>

=====================================

The GCF is 5, which can be factored out of the expression

Note how

30a = 5*6a

35 = 5*7

So we see the common factor between the two terms. You use the distribution property to pull out that 5. If you were do distribute the 5 back in, you'd get

5(6a+7) = 5*6a+5*7 = 30a+35

5 0

4 years ago

Read 2 more answers

Mattie uses the discriminamt to determine the number of zeros the quadratic equation 0=3x^2-7x+4?

Natali [406]

There are 2 roots for this equation.

The discriminant is given by b²-4ac. This is what goes under the square root in the quadratic formula. Since we will be taking the square root of this, if the discriminant is less than 0, there are no real roots; you cannot have a real square root of a negative number.
If the discriminant is equal to 0, there is 1 real root; the square root of 0 is 0, so the quadratic formula would yield one answer.
If the discriminant is greater than 0, there are 2 real roots. This is because taking the square root of a positive number gives a positive and negative result.

b in our equation is -7, a is 3 and c is 4:
b²-4ac = (-7)²-4(3)(4) = 49 - 48 = 1

There is 1 real root.

4 0

4 years ago