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4 years ago

How many terms are in the algebraic expression 3x2 + 4y - 1? A. 2 B. 3 C. 5 D. 4

Mathematics

2 answers:

Ronch [10]4 years ago

7 0

2
3x2+4y-1
6+4y-1
=5+4y

DIA [1.3K]4 years ago

4 0

Answer:

Step-by-step explanation:

3×2+4y-1

=6+4y-1

=5+4y

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Solve questions 15,16,17, and 18. Will give Brainliest!! Please!!! Show minimal work!

SVEN [57.7K]

15. The terminal side of $\frac{3\pi}{2}$ intercepted the unit circle at:

(0,-1).

This implies that:

$(\cos \frac{3\pi}{2}, \sin \frac{3\pi}{2}=(0,-1)$

This implies that:

$\cos \frac{3\pi}{2}=0,\:and\: \sin \frac{3\pi}{2}=-1$

16) We have that: $\cot \theta =-\frac{6}{7}$ .

We illustrate this on the right triangle and apply the Pythagoras Theorem as follows:

$h^2=6^2+7^2$

$h^2=36+49$

$h^2=85$

$h=\sqrt{85}$

Using the mnemonics SOH-CAH-TOAH, we have:

$\sin \theta=-\frac{Opp}{Hyp}=-\frac{7}{\sqrt{85} }=-\frac{7\sqrt{85} }{85}$

$\cos \theta=\frac{Adj}{Hyp}=\frac{6}{\sqrt{85} }=\frac{6\sqrt{85} }{85}$

$\tan \theta=-\frac{Opp}{Adj}=-\frac{7}{6}}$

$\csc \theta=-\frac{Hyp}{Opp}=-\frac{\sqrt{85} }{7}$

$\sec \theta=\frac{Hyp}{Adj}=\frac{\sqrt{85} }{6}$

17. We want to verify that: $sin^4x-sin^2x=cos^4x-cos^2x$

Verifying from the LHS

$\sin^4x-sin^2x=(sin^2x)^2-sin^2x$

Recall that from the Pythagorean identity: $\sin^2x=1-\cos^2x$

$\sin^4x-sin^2x=(1-cos^2x)^2-(1-\cos^2x)$

$\sin^4x-sin^2x=1-2cos^2x+\cos^4x-1+\cos^2x$

$\sin^4x-sin^2x=\cos^4x-\cos^2x$

18. We have:

$\tan^2x\sec^2x+2\sec^2x-\tan^2x=2$

$\tan^2x\sec^2x+2\sec^2x-\tan^2x-2=0$

$\sec^2x(\tan^2x+2)-1(\tan^2x+2)=0$

$(\sec^2x-1)(\tan^2x+2)=0$

When $(\sec^2x-1)=0$ , we have

$x=0,\pi$

When $\tan^2x+2=0$ , $\tan^2x=-2$

We can see this is not defined for all real values of x.

6 0

3 years ago

Squaring a number and adding one will always produce an even number.

Dahasolnce [82]

Answer:

False. Squaring any rational, whole number, will always give you a even number. So if you add one to the number, you will get a odd number.

3 0

3 years ago

The hypotenuse is NOT located across from the right angle<br><br> True or false

azamat

The statement, The hypotenuse is NOT located across from the right angle is false.

<h3>What is a right angled triangle? </h3>

A right-angled triangle is a type of triangle that has an angle that measures 90 degrees. The triangle has three sides. The hypotenuse is the longest side of a right-angled triangle. Other sides are the base and the length. The sum of sides in a a right-angled triangle is 180 degrees.

Please find attached an image of a right-angled triangle. To learn more about a triangle, please check: brainly.com/question/9329354

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3 years ago

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Geometry help!!

Eduardwww [97]

It would be A, Side Angle Side (SAS). Because you are given we congruent sides, and tow right angles. Using the reasoning of "If two two angles are both right angles then they are congruent" you can prove the angles congruent.

The reason it is not HL is because HL is used when it is given a right angle and the hypotenuse and one of the legs congruent. Therefore the only choice is Side Angle Side (SAS).

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4 years ago

At the James Factory, the assembly line produces 89 pairs of jeans in a batch. The pairs of jeans are packaged in boxes with 11

goldfiish [28.3K]

89-77=12 , there will be 12 pairs of jeans left

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3 years ago

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