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professor190 [17]
3 years ago
13

-3x² - 4x – 8=0 Does anyone know how to solve this?

Mathematics
1 answer:
sveta [45]3 years ago
7 0

Answer:

That is a quadratic equation.

It can be solved by using the quadratic formula:

x = (-b +-sqr root b^2 -4*a*c) / 2 *a

In this equation a = -3

b = -4 and c = -8

x = (--4 +- sqr root (-4^2 - 4 * -3 * -8)) / (2 * -3)

x = (4 +- sqr root (16 -96)) / -6

x = 4 +- sqr root (-80) / -6

x1 = (4 +8.94427191 * i)  / -6

x2 =(4 -8.94427191 * i)  / -6

Remember that "i" is the square root of minus 1.

 

Step-by-step explanation:

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lapo4ka [179]

<em>Answer:</em>

<em>6 6/7</em>

<em>Step-by-step explanation:</em>

<em>Hope this helps:)</em>

3 0
3 years ago
The area of a rectangle is 48ft2. The length is 3 times the width. Which of the following equations can be used to solve for the
emmainna [20.7K]

Answer:

Width of rectangle = 4 ft

Step-by-step explanation:

Given:

Area of rectangle = 48 ft²

Length of rectangle = 3[Width of rectangle]

Find:

Width of rectangle

Computation:

Assume;

Width of rectangle = a

So,

Length of rectangle = 3[Width of rectangle]

Length of rectangle = 3a

Area of rectangle = l x b

48 = 3a x a

3a² = 48

a² = 16

a = 4

Width of rectangle = 4 ft

Length of rectangle = 3[Width of rectangle]

Length of rectangle = 3[4]

Length of rectangle = 12 ft

6 0
3 years ago
HELP! 10 points!!
Akimi4 [234]

Answer:

A: E = 0.05t +56

B: $73.50

C: $60.05

Step-by-step explanation:

A) I'll just explain the equation in one go

Equation: E = 0.05t + 56

0.05 - This is meant to represent the 5% of tips

5% = 5/100

5/100 = 0.05

56 - This is a set value that has been established as a constant, thus it simply needs to be added to the 5%

B+C) Since we already have the equation set up, we just need to plug in the variable, t.

B) E = 0.05(350) + 56

= 17.5 + 56

= 73.50

C) E = 0.05(81) + 56

= 4.05 + 56

= 60.05

Hope that does something to help, even though this was posted a while ago

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3 years ago
Malia has 6 groups of 18 buttons. How many buttons does Malia have altogether?
mariarad [96]

6 groups of 18 buttons would translate into multiplication.

6 x 18 = 108 buttons total that Malia has.

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3 years ago
To observe a session of the state senate, 18 students are visiting the state capitol. They will tour the capital in groups with
inysia [295]

Answer:9

Step-by-step explanation:

6 0
3 years ago
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