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nadya68 [22]
2 years ago
10

Very easy!! help!! urgent!! its on ratio

Mathematics
1 answer:
masha68 [24]2 years ago
5 0

Answer:

A and B are correct

Step-by-step explanation:

if x:y is 1:3 then x is 1 and y is 3

1/3 of 3 is 1 so A is correct

3/4(1+3) is 3 so B is correct

But

1/4 × 3 is not 1 so C is not correct

3/4 ×1 is not 3 so D isn't correct

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Consider the proof for the identity csc(x)+sin(x)=(2-cos^(2)(x))/(sin(x)).
spin [16.1K]

1. given:

csc(x) + sin(x)

2. definition of csc(x) :

1/sin(x) + sin(x)

3. combining fractions with a common denominator:

(1 + sin²(x))/sin(x)

4. expanding 1 = cos²(x) + sin²(x) :

(cos²(x) + sin²(x) + sin²(x))/sin(x)

5. simplifying:

(2 sin²(x) + cos²(x))/sin(x)

6. employing the same identity as in (4) :

(2 (1 - cos²(x)) + cos²(x))/sin(x)

7. expanding 2 (1 - cos²(x)) :

(2 - 2 cos²(x) + cos²(x))/sin(x)

8. simplifying:

(2 - cos²(x))/sin(x)

8 0
2 years ago
I need help please.....
arlik [135]

Answer:

I am pretty sure the answer is 498.  

Step-by-step explanation:

You have to solve the parentheses first.  So,

9(7      (14-6)      -3 x 2)  

63         (8)             -6)

63(8)-6

63(8) = 504

504-6 = 498

please let me know f this is correct :)

4 0
3 years ago
Read 2 more answers
I need helppp what is the blue line called in the circle??
andrezito [222]

Answer: B: diameter

Step-by-step explanation:

The blue line the goes across the shape is called the diameter

Hope this helps ;)

8 0
2 years ago
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Given: Quadrilaterals ABCD ~ EFGH , with measure of angle A = 47 degrees, measure of angle B = 39 degrees, and measure of angle
kaheart [24]

Answer:

The answer is below

Step-by-step explanation:

Two polygons are said to be congruent if they have the same size and shape that is their corresponding angles and sides are equal.

Hence since Quadrilaterals ABCD is congruent to EFGH, then their corresponding angles and sides are equal.

In quadrilateral ABCD:

∠A + ∠B + ∠C + ∠D = 360° (sum of angles in a quadrilateral)

Substituting:

47 + 39 + 112 + ∠D = 360

∠D + 198 = 360

∠D = 360 - 198

∠D = 162°

The image of Quadrilaterals ABCD and EFGH is not given but let us assume that they have the same orientation, hence:

∠A = ∠E = 47°

∠B = ∠F = 39°

∠C = ∠G = 112°

∠D = ∠H = 162°

3 0
2 years ago
Question 5 (4 points)<br> Fill in the missing numbers in these equations <br><br> PLEASE HELP ASAP
Finger [1]

Answer:

nope i need more points lol

Step-by-step explanation:

7 0
3 years ago
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