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USPshnik [31]
3 years ago
14

Verify the identity. cos (x - y) - cos (x + y) = 2 sin x sin y

Mathematics
1 answer:
ra1l [238]3 years ago
8 0
It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)
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Which number line represents the solution set for the inequality 2x – 6 ≥ 6(x – 2) + 8?
vovangra [49]

Answer: x≤ -0.5

Step-by-step explanation:  Graph the two lines or solve for x:

2x – 6 ≥ 6(x – 2) + 8

2x – 6 ≥ 6x – 12 + 8

2x – 6 ≥ 6x – 4

-4x  ≥  2

  x  ≤  -1/2  [Inequality is reversed when multiplying or dividing by a negative number]

The number line is anything less than or equal to - 1/2

Or one can plot each side of the inequality and note the interception point (x = -(1/2)).

4 0
2 years ago
Car A a can go 332 miles on 12.5 gallons of gasoline. Car B can go 304 miles on 10.5 gallons of gasoline. which car has a better
lidiya [134]

Answer:

B) car B

explanation :

I know that Car A can go at least 28 more miles than Car B. If you round 10.5 to the nearest ones place it would be 11; and if you round 12.5 to the nearest ones place it would be 13 so 13 - 11 = 2

I hope I can help you have a great day :)

4 0
3 years ago
Read 2 more answers
The value of the expression 23 +32–3x4–52-5+(7x4) is
Mashcka [7]

Answer:

24

Explanation:

(23+32)-(3×4)-(52-5)+(7×4)

(55)-(12)-(47)+(28)

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  • -47+28= -19
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4 0
3 years ago
Simplify the expression 1+2*[(3+1)*5+3]
Lady bird [3.3K]

1 + 2 *[(3+1)*5+3]

=  1 + 2*[(4)*5+3]

=  1 + 2*[20+3]

=  1 + 2 * 23

= 1 + 46

= 47

Answer

c. 47

7 0
2 years ago
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Step-by-step explanation:

it is 5/6 ..............

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2 years ago
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