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3 years ago

DON'T GIVE ME LINK AS ANSWER PLEASE!!

Mathematics

1 answer:

iris [78.8K]3 years ago

8 0

Answer: a. The median is 5, the interquartile range is 10.

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Mia uses 1/5 of a bag of gravel in the morning and 11/12 of a bag in the afternoon and how much gravel does she use in one day

wariber [46]

Answer:

She used 67/60 of a bag of gravel in one day.

Step-by-step explanation:

We must get a common denominator so we can add the two fractions.

Let's use 60!

1/5 = 12/60

11/12 = 55/60

Now we can add and get 67/60!

She used 67/60 of a bag of gravel in one day.

3 0

3 years ago

Rewrite with only sin x and cos x.

Annette [7]

Option A

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

Solution:

Given that we have to rewrite with only sin x and cos x

Given is cos 3x

$cos 3x = cos(x + 2x)$

We know that,

$\cos (a+b)=\cos a \cos b-\sin a \sin b$

Therefore,

$\cos (x+2 x)=\cos x \cos 2 x-\sin x \sin 2 x$ ---- eqn 1

We know that,

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

$\cos 2 x=\cos ^{2} x-\sin ^{2} x$

Substituting these values in eqn 1

$\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)$ -------- eqn 2

We know that,

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

Applying this in above eqn 2, we get

$\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)$

$\begin{aligned}&\cos (x+2 x)=\cos x-2 \sin ^{2} x \cos x-2 \sin ^{2} x \cos x\\\\&\cos (x+2 x)=\cos x-4 \sin ^{2} x \cos x\end{aligned}$

$\cos (x+2 x)=\cos x-4 \cos x \sin ^{2} x$

Therefore,

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

Option A is correct

7 0

3 years ago

Which of the following are solution to the equation below Check all that apply. (4x-1)^2=11

Juliette [100K]

Answer:

I think it's E and F. Let me know if I am wrong.

Step-by-step explanation:

4 0

3 years ago

Determine the intercepts of the line.

andre [41]

Answer:

x-intercepts = (-3/4, 0)

y-intercepts = (0, 3/7)

Step-by-step explanation:

3 0

3 years ago

I need answers fast plsss

Nonamiya [84]

Answer:

1/6

Step-by-step explanation:

the form you're using is slope-intercept. That is

y=mx+b

where y= y coordinate

m=slope

x= x coordinate

and b= y intercept

so, m in that equation is 1/6, so the slope is 1/6

Hope this helps!

6 0

2 years ago