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1 year ago

15

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

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:

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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: $y=x+6$

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

Step-by-step explanation:

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

5 0

3 years ago