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3 years ago

Using quadratic formula , give your answer as specified x2+4x-1=0 (exact root)

Mathematics

1 answer:

elena-s [515]3 years ago

7 0

Answer: (-2+√5), (-2-√5)

Step-by-step explanation:

1. Reference the formula: [(-b±(√b^2-4ac))/2a]

2. Plug in the values from the equation: [(-4±(√16+4))/2]

3. Simplify: [(-4±(√20))/2]

4. Simplify the root: [(-4±(2√5))/2]

5. Simplify the fraction: [-2±√5]

6. There's your answer: (-2+√5), (-2-√5)

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Find the product (7m^2-3m-7)(m^2-7m-6)

earnstyle [38]

Answer:

7m^4-52m^3-28m^2+67m+42

Step-by-step explanation:

(7m^2-3m-7)(m^2-7m-6)

7m^4-3m^3-7m^2-49m^3+21m^2+49m-42m^2+18m+42

7m^4-3m^3-49m^3-7m^2+21m^2-42m^2+49m+18m+42

7m^4-52m^3-28m^2+67m+42

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3 years ago

Three classes of school children are selling tickets to the school play. The number of tickets sold by these classes, and the nu

Westkost [7]

Answer:

The expression for the average number of tickets sold per school child is:

$M = \frac{tickets*class1 + tickets2*class2 + tickets3*class3}{class1 + class2 + class3}$

Step-by-step explanation:

The average number of tickets sold per school child is the weighted mean calculus between the number of tickets sold by these classes and the number of children in each classes.

This is the multiplication between the number of tickets sold by these classes and the number of children in each classes divided by the total weight(in this exercise, the total weight is the total number of school child).

So, the expression for the average number of tickets sold per school child is:

$M = \frac{tickets*class1 + tickets2*class2 + tickets3*class3}{class1 + class2 + class3}$

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3 years ago

Question 6:

AnnZ [28]

David rode his bicycle for 6 hours and he jogged for 8 hours during the past 2 weeks. We can say that per week, he rode his bicycle for 3hours and jogged for 4 hours. And he will jog for: 24 * 4 = 96 hours. Your welcome good luck

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Yes! This work is all correct.

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3 years ago

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