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2 years ago

Write the following expression in standered form. -3•2•a+5(-7b)+(12•c•4)

Mathematics

1 answer:

Alex2 years ago

6 0

Answer:

−6a − 35b + 48c

Step-by-step explanation:

You do pemdas and if you know Pemads you will get your anwser

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You are given the right triangle below. Find each of the trig ratios. Enter your answers as fractions in lowest terms.

grin007 [14]

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3 years ago

I upped the steaks plz answer this, I will give brainiest

Bad White [126]

Answer:

$\displaystyle x = \frac{3}{4}$

Step-by-step explanation:

we are given that

$\displaystyle P = \left(x, - \frac{ \sqrt{7} }{4} \right)$

we want to figure out x

remember that,

In unit circle x coordinate is considered cos and y coordinate is considered sin

so in order to figure out x we should figure out the value of cos to do we can consider Pythagoras trig indentity

given by

$\displaystyle \sin ^{2} ( \theta) + { \cos}^{2} ( \theta) = 1$

we are given sin=-√7/4 thus

substitute:

$\displaystyle \left( - \frac{ \sqrt{7} }{4} \right) ^{2} + { \cos}^{2} ( \theta) = 1$

simplify square:

$\displaystyle \frac{7}{16} + \cos ^{2} ( \theta) = 1$

move left hand side expression to right hand side and change its sign:

$\displaystyle \cos ^{2} ( \theta) = 1 - \frac{7}{16}$

simplify Substraction:

$\displaystyle \cos ^{2} ( \theta) = \frac{9}{16}$

square root both sides:

$\displaystyle \cos ^{} ( \theta) = \pm\frac{3}{4}$

since in unit circle cos is x and P belongs to Q:IV negative cos isn't applicable

hence,

$\displaystyle x = \frac{3}{4}$

5 0

3 years ago

I. What is 42% of 18? need help fast!

irina [24]

Answer:

It is 7.56!

Other:

Brainliest? Thanks!

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3 years ago

A hotel housekeeper has cleaned 1 3 of the first floor in 1 5 of an hour. At what rate is she cleaning?

snow_lady [41]

Answer:

the answer i kdjc hbvfecids bd hcnj (lag) and there you go

Step-by-step explanation:

vguyihujoipklemjnhbfugvyohufnhbjchsdefvyadiucbeeevrfyujcnhbvghufcn bgvthfvgthufrn bfybc gvthc fgvhc fhycb (lag)

7 0

3 years ago

Read 2 more answers

24cm long 16cm wide whars the ratio

Andrej [43]

24:16 which is simplified by dividing both sides by 8 so it becomes:
3:2

Hope this helps :)

3 0

2 years ago