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3 years ago

PLEASE HELP ASAPPP

Mathematics

1 answer:

zaharov [31]3 years ago

6 0

The answer will be 0.25

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Need help just give me he answer

mestny [16]

The real question is, why weren't you paying attention? Brainly won't be here on your exams. Next time pay attention. For now, Guess.
Because lack of paying attention has consequences.

Hope you learn a valuable lesson here.
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3 years ago

46 is 23% of what number ?

Lelu [443]

200, because of the fact that 23 is half as much as 46, and 46 has to be 23% of 200 since 23 is 23% of 100!!!

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3 years ago

The initial value of a quantity Q (at year t = 0) is 112.8 and the quantity is decreasing by 23.4% per year. a) Write a formula

Svetach [21]

Answer:

a) $Q(t) = 112.8*(0.766)^{t}$

b) When t = 10, Q = 7.845.

Step-by-step explanation:

The value of a quantity after t years is given by the following formula:

$Q(t) = Q_{0}(1 + r)^{t}$

In which $Q_{0}$ is the initial quantity and r is the rate that it changes. If it increases, r is positive. If it decreases, r is negative.

a) Write a formula for Q as a function of t.

The initial value of a quantity Q (at year t = 0) is 112.8.

This means that $Q_{0} = 112.8$ .

The quantity is decreasing by 23.4% per year.

This means that $r = -0.234$

$Q(t) = 112.8*(1 - 0.234)^{t}$

$Q(t) = 112.8*(0.766)^{t}$

b) What is the value of Q when t = 10?

This is Q(10).

$Q(t) = 112.8*(0.766)^{t}$

$Q(t) = 112.8*(0.766)^{10} = 7.845$

When t = 10, Q = 7.845.

4 0

4 years ago

Evaluate the discriminant of -3x2+5-4=0

krok68 [10]

Answer:

-23

Step-by-step explanation:

A quadratic equation is given to us and we are interested in finding the discriminant of the quadratic equation . As we know that ,

If the quadratic equation is in Standard form ,

$\sf\longrightarrow ax^2+bx + c = 0$

The discriminant is ,

$\sf\longrightarrow D = b^2-4ac$

The given quadratic equation is ,

$\sf\longrightarrow -3x^2 +5x - 4 = 0$

On comparing it with the Standard form , we have ,

a = (-3)
b = 5
c = (-4)

So that ,

$\sf\longrightarrow D = (5)^2 - 4(-3)(-4)\\$

$\sf\longrightarrow D = 25 - 48\\$

$\sf\longrightarrow \bf D = -23$

Also note that if D < 0 , then the roots are complex conjugates .

<h3>Hence the discriminant is (-23).</h3>

5 0

2 years ago

Plz answer b I don't get it

rewona [7]

What is the question??

5 0

3 years ago