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Debora [2.8K]
2 years ago
6

Evaluate the following expression when b = -2.4 2 x 5x =

Mathematics
1 answer:
Illusion [34]2 years ago
3 0
Are you sure it’s b or is it x?
You might be interested in
Hi Brainly users! I have an 8th grade math problem for you. 15 points plus Brainiest for the person with the most helpful answer
RUDIKE [14]

Answer:

The answer is D. 14

Step-by-step explanation:

If you were to plug in 14 for x, it would look something like this:

\frac{14-4}{14} = \frac{5}{7}

Solve 14-4

\frac{10\\}{14} = \frac{5}{7}

if you were to multiply 5 and 7 by 2, you would get

\frac{10}{14}.

This makes the equation true, because

10/14 does equal itself (10/14)

Have a nice day!

6 0
3 years ago
Use the discriminant to find the number of real solutions of the equation 3x^2 – 5x + 4 = 0
Virty [35]
To use the discriminant, first identify a, b, and c. In your equation a= 3 b = -5 and c = 4. Now plug into the discriminant b^2 - 4ac. Substituting yields (-5)^2 - 4(3)(4). Simplifying, 25 - 48 = -23. Since the discriminant has a negative value, there is no real solution to this equation.
4 0
2 years ago
Read 2 more answers
Irrational numbers are closed under subtraction true/false
Sergeu [11.5K]

Answer:

False!

Step-by-step explanation:

hope this helps, have a good day! :)

3 0
2 years ago
Read 2 more answers
3(2.7+5)−2 what is the answer
lbvjy [14]

Answer:

The answer to the problem is 21.1

3 0
3 years ago
Find the larger of the two roots of the equation y = -2.2x2 + 63.5x - 17
Luden [163]

The larger of the two roots of the equation y = -2.2x^2 + 63.5x - 17would be 28.59.

<h3>How to find the roots of a quadratic equation?</h3>

Suppose that the given quadratic equation is

ax^2 + bx + c = 0

Then its roots are given as:

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

The given quadratic equation is

y = -2.2x^2 + 63.5x - 17

now, the roots of the equation are

x = \dfrac{-63.5 \pm \sqrt{63.5^2 - 4(-2.2)(-17)}}{2(-2.2)}\\\\\\x = \dfrac{-63.5 \pm \sqrt{4032.25 - 149.6}}{(-4.4)}\\\\\\x = \dfrac{-63.5 \pm \sqrt{3882.65}}{(-4.4)}\\\\\\x = \dfrac{-63.5 \pm 62.31}{(-4.4)}

The two roots are 0.27 and 28.59.

Thus, the larger of the two roots of the equation y = -2.2x^2 + 63.5x - 17would be 28.59.

Learn more about finding the solutions of a quadratic equation here:

brainly.com/question/3358603

#SPJ1

7 0
2 years ago
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