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Lana71 [14]
1 year ago
15

1. Which is an example of an algebraic expression? 04(3 + 8) 018² 03-a 021.4

Mathematics
2 answers:
mars1129 [50]1 year ago
7 0

Answer:

03-a

Step-by-step explanation:

It's an algebraic expression cuz it has an unknown variable (a)

podryga [215]1 year ago
7 0
021.4 would be correct answer
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2x + 3 = 5x - 2
Daniel [21]

Answer:

x3r9

Step-by-step explanation:

5 0
3 years ago
My pet goldfish is two times as old as my hamster. The goldfish is also 12 less than five
andrew-mc [135]
I’m gonna say put in the calculator 2x the hams age and then put -12 -5.
3 0
3 years ago
 Find sin2x, cos2x, and tan2x if sinx=-15/17 and x terminates in quadrant III
Paha777 [63]

Given:

\sin x=-\dfrac{15}{17}

x lies in the III quadrant.

To find:

The values of \sin 2x, \cos 2x, \tan 2x.

Solution:

It is given that x lies in the III quadrant. It means only tan and cot are positive and others  are negative.

We know that,

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

(-\dfrac{15}{17})^2+\cos^2 x=1

\cos^2 x=1-\dfrac{225}{289}

\cos x=\pm\sqrt{\dfrac{289-225}{289}}

x lies in the III quadrant. So,

\cos x=-\sqrt{\dfrac{64}{289}}

\cos x=-\dfrac{8}{17}

Now,

\sin 2x=2\sin x\cos x

\sin 2x=2\times (-\dfrac{15}{17})\times (-\dfrac{8}{17})

\sin 2x=-\dfrac{240}{289}

We know that,

\cos 2x=1-2\sin^2x

\cos 2x=1-2(-\dfrac{15}{17})^2

\cos 2x=1-2(\dfrac{225}{289})

\cos 2x=\dfrac{289-450}{289}

\cos 2x=-\dfrac{161}{289}

Using the trigonometric ratios, we get

\tan 2x=\dfrac{\sin 2x}{\cos 2x}

\tan 2x=\dfrac{-\dfrac{240}{289}}{-\dfrac{161}{289}}

\tan 2x=\dfrac{240}{161}

Hence, the required values are \sin 2x=-\dfrac{240}{289},\cos 2x=-\dfrac{161}{289},\tan 2x=\dfrac{240}{161}.

6 0
3 years ago
Terri bought four lipsticks for a total cost of $20. Assuming each lipstick cost the same amount, how much did one lipstick cost
Vika [28.1K]
If Terri bought 4 lipsticks for $20, each at an equal price, we can divide 20 by 4 to get the unit price, or cost of one.

20 / 4 = 5

So, each lipstick costs $5.


Because l stands for the cost of one lipstick, we can write it as l = $5.


I hope this helped you. Have a good day/night, and continue to work hard.
7 0
2 years ago
Write an equation to describe the relationship in each table
Yuri [45]

Answer:

1:y=x+6

2y=\frac{1}{2}x

Step-by-step explanation:

If I helped, a brainliest answer would be greatly appreciated!

5 0
3 years ago
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