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3 years ago

Please Helppppp :) :)

Mathematics

2 answers:

harkovskaia [24]3 years ago

5 0

Answer:

mm the answer would be

Step-by-step explanation:

1 may be

sveta [45]3 years ago

3 0

1. the answer is D (3) 2. the answer is B (57)

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Simplify the expression

chubhunter [2.5K]

Answer:

sin(α) -cos(α)

Step-by-step explanation:

$\dfrac{2\sin^2{\alpha}-1}{\sin{\alpha}+\cos{\alpha}}=\dfrac{(2\sin^2{\alpha}-1)(\sin{\alpha}-\cos{\alpha})}{(\sin{\alpha}+\cos{\alpha})(\sin{\alpha}-\cos{\alpha})}\\\\=\dfrac{(2\sin^2{\alpha}-1)(\sin{\alpha}-\cos{\alpha})}{\sin^2{\alpha}-\cos^2{\alpha}}=\dfrac{(2\sin^2{\alpha}-1)(\sin{\alpha}-\cos{\alpha})}{\sin^2{\alpha}-(1-\sin^2{\alpha})}\\\\=\dfrac{(2\sin^2{\alpha}-1)(\sin{\alpha}-\cos{\alpha})}{2\sin^2{\alpha}-1}\\\\=\sin{\alpha}-\cos{\alpha}$

4 0

3 years ago

Correct + Best explanation gets brainliest.

Yuki888 [10]

let length of the rectangle be l

length is 6 cm longer than the width, w

l = w + 6

perimeter of rectangle is 72 cm

= 2l + 2w

substitute l = w + 6

2(w+6) + 2w = 72

4w + 12 = 72

4w = 60

x = 15

ans is C. 15 cm

5 0

3 years ago

Read 2 more answers

Can someone please help me out!!!!

Elenna [48]

Use the brainly math caculate and slove both problems then add it and what ever you get is the premiter

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3 years ago

When you look at the two cylinders with these values of rand h, what do you notice about the proportions of the cylinders?

Klio2033 [76]

Answer:

One of the cylinders is short and wide, while the other is tall and thin.

Step-by-step explanation:

7 0

3 years ago

Help with all, Evaluate each expression of A=8, B=5, C=-2

ivanzaharov [21]

Answer:

A is 13

Step-by-step explanation:

That is because you have to K C C. Since there is no l9onger negatives, you can add

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3 years ago