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3 years ago

What is -2 and 1/2 as a decimal

Mathematics

2 answers:

disa [49]3 years ago

8 0

(-2.5) i think thats what ur looking for. if not, sorry!

olganol [36]3 years ago

5 0

Answer:

-2.5

Step-by-step explanation:

Just change 1/2 to .5 and there you have it. Negative two isn't a fraction or percentage so it doesn't need to be changed.

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2 years ago

Fill in Sin, Cos, and tan ratio for angle x. <br> Sin X = 4/5 (28/35 simplified)

Fantom [35]

Answer:

Given: $\sin(x) = (4/5)$ .

Assuming that $0 < x < 90^{\circ}$ , $\cos(x) = (3/5)$ while $\tan(x) = (4/3)$ .

Step-by-step explanation:

By the Pythagorean identity $\sin^{2}(x) + \cos^{2}(x) = 1$ .

Assuming that $0 < x < 90^{\circ}$ , $0 < \cos(x) < 1$ .

Rearrange the Pythagorean identity to find an expression for $\cos(x)$ .

$\cos^{2}(x) = 1 - \sin^{2}(x)$ .

Given that $0 < \cos(x) < 1$ :

$\begin{aligned} &\cos(x) \\ &= \sqrt{1 - \sin^{2}(x)} \\ &= \sqrt{1 - \left(\frac{4}{5}\right)^{2}} \\ &= \sqrt{1 - \frac{16}{25}} \\ &= \frac{3}{5}\end{aligned}$ .

Hence, $\tan(x)$ would be:

$\begin{aligned}& \tan(x) \\ &= \frac{\sin(x)}{\cos(x)} \\ &= \frac{(4/5)}{(3/5)} \\ &= \frac{4}{3}\end{aligned}$ .

7 0

2 years ago

How would you know if these are a positive or a negative 0,1) and (-3,6).

Ipatiy [6.2K]

Negative has the little dash in front of it

Thank you hope this helps

7 0

3 years ago

What is -2 and 1/2 as a decimal​

What is -2 and 1/2 as a decimal