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3 years ago

Express the inequality using interval notation.−4≤x≤0

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

4 0

Answer:

[-4,0]

Step-by-step explanation:

we use closed bracket to show " it includes" and -4 and 0 are included in the solution set

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The price of pears at a farm is $1.41 per pound. Which equation can be used to determine c, the total price of n pounds of pears

Schach [20]

Answer:

C = 1.41n

Step-by-step explanation:

you have to multiply 1.41 by the weight(n)

7 0

3 years ago

Cos2a= 2cos^2a-1 for all values of a<br><br> true or false?

Law Incorporation [45]

True
<span>Cos(A+B)=CosACosB-SinASinB
therefore Cos(A+A)= CosACosA - SinASinA
= Cos^2A - Sin^2A</span>

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4 years ago

Read 2 more answers

Simplify. y^-3 pls help me i need this very bad

prisoha [69]

My understanding is that when the power is a negative number, move it to the denominator and change it to positive.
In this case, the base is y, the power is -3
y^(-3)=1/(y^3)

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3 years ago

22. A charter bus company charges a flat fee of $175, plus $2.50 per mile (one-way distance) for a bus. If the band paid exactly

Cerrena [4.2K]

Answer:

180 miles

Step-by-step explanation:

625 - 175= 450

450 divided by 2.50 = 180

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2 years ago

What basic trigonometric identity would you use to verify that

Dafna1 [17]

Given the equation:

$\frac{\sin^2x+\text{cos}^2x}{\cos x}=\sec x$

Let's determine the trigonometric identity that you could be used to verify the exquation.

Let's determine the identity:

Apply the trigonometric identity:

$\sin ^2x+\cos ^2x=1$

$\cos x=\frac{1}{\sec x}$

Replace cosx for 1/secx

Thus, we have:

$\begin{gathered} \frac{\sin^2x+\cos^2x}{\frac{1}{\sec x}} \\ \\ =(\sin ^2x+\cos ^2x)(\sec x) \\ \text{Where:} \\ (\sin ^2x+\cos ^2x)=1 \\ \\ We\text{ have:} \\ (\sin ^2x+\cos ^2x)(\sec x)=1\sec x=\sec x \end{gathered}$

The equation is an identity.

Therefore, the trignonometric identity you would use to verify the equation is:

$\cos ^2x+\sin ^2x=1$

ANSWER:

$\cos ^2x+\sin ^2x=1$

6 0

1 year ago