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vagabundo [1.1K]
3 years ago
15

What is the amplitude of the graph whose equation is y=-4 sin 2x

Mathematics
1 answer:
oee [108]3 years ago
7 0

Answer:

Step-by-step explanation:

amplitude of y=a sin x

amplitude=a

Here y=-4sin 2x

amplitude=-4

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Daniel says that when the irrational number 7√3 is multiplied by any rational number, the product is always an irrational number
jeka94

Answer: 0

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

Explanation:

When we multiply 0 by any number, we get 0 as a result

x*0 = 0

0*x = 0

for any number x.

The number 0 is rational since we can write it as a fraction of two integers

0 = 0/1

If Daniel were to correct his statement to say "multiply by any <u>nonzero</u> rational number", then his statement would be correct that the result is irrational.

----------------------------------------------

Extra info:

Here's a proof showing why Daniel's claim is correct if we consider nonzero rational numbers

Let p be a nonzero rational number, so p = a/b for integers a,b where neither a or b are zero

Let q be an irrational number. We cannot write q as a ratio of two integers

The claim is that p*q is irrational. For now let's assume the opposite. So assume p*q is rational. This means p*q = r/s for integers r,s

This would be the same as (a/b)*q = r/s which solves to q = (r/s)*(b/a) = (rb)/(sa) making q rational, but that contradicts the fact we made q irrational earlier.

Therefore, the assumption p*q is rational cannot be the case, and p*q must be irrational.

7 0
2 years ago
A national publication showed the following distribution of favorite class subjects for high school students.
galben [10]

Answer:

I and III

Step-by-step explanation:

5 0
2 years ago
Given the following Polynomial Functions:
ELEN [110]

Answer:

f(g(x))=7(2x+8)-5=

14x+56-5=

14x+51

Step-by-step explanation:

3 0
3 years ago
If x/y + y/x = -1 , ( x unequal y, y unequal 0) then the value of x^2 - y^2 is?
Maurinko [17]

Take your original equation \frac{x}{y} +\frac{y}{x} =-1

and multiply both sides by xy to remove the fractions. You are left with

x^2+y^2=-xy

So, x^2+y^2=-xy

Update: There is no numerical answer that can be found without being given a value for either x or y

3 0
3 years ago
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Kit bought a soft drink and a sandwich for $9.00. What was the price of each of the sandwich cost 3.5 times as much as the drink
Rainbow [258]
Sandwich cost $7.70 and the soda costs $2.20.
8 0
3 years ago
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