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kkurt [141]
3 years ago
8

Simplify 3(2x-7y)+2(2x+3)=

Mathematics
1 answer:
Llana [10]3 years ago
3 0

Answer:25

Step-by-step explanation:Use pemdas first (2x-7y) 2-7=5 next (2x+3) 2+3=5 3•5=15 5•2=10 3•5=15 add 10+15=25

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Prove the identity.<br>cosx sin (x+y) - sinx cos(x+y) = siny​
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Answer:

In the explanation

Step-by-step explanation:

Going to start with the sum identities

sin(x+y)=sin(x)cos(y)+sin(y)cos(x)

cos(x+y)=cos(x)cos(y)-sin(x)sin(y)

sin(x)cos(x+y)=sin(x)cos(x)cos(y)-sin(x)sin(x)sin(y)

cos(x)sin(x+y)=cos(x)sin(x)cos(y)+cos(x)sin(y)cos(x)

Now we are going to take the line there and subtract the line before it from it.

I do also notice that column 1 have cos(y)cos(x)sin(x) in common while column 2 has sin(y) in common.

cos(x)sin(x+y)-sin(x)cos(x+y)

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=sin(y)

6 0
2 years ago
Question 3
REY [17]
<span>Question 3 
Solve for d.

13d + 4 = 43
13d = 39
    d = 3

answer
A. 3

</span><span>Question 4 
Solve for r.

4r - 6 = 30
4r = 36
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answer

D. 9
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<span>Question 5 
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126 = 6u
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4 0
3 years ago
A card is drawn at random from a standard 52-card deck. Events G and A are
kolezko [41]
P(G) is 26/52
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See the rest in the photo

6 0
2 years ago
B)<br>9f + 101 - 12f<br>Simply ​
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Answer:

-3f+101

Step-by-step explanation:

6 0
3 years ago
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Gwar [14]

Answer:

∠ 5 = 49°, ∠ 6 = 131°

Step-by-step explanation:

∠ 5 and 49° are corresponding angles and are congruent, then

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∠ 6 + ∠ 5 = 180°

∠ 6 + 49° = 180° ( subtract 49° from both sides )

∠ 6 = 131°

5 0
3 years ago
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