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Harlamova29_29 [7]
3 years ago
8

Simplify cos2x tan2(-x)-1 / cos2x

Mathematics
1 answer:
PtichkaEL [24]3 years ago
6 0
-x sec(2) sin (2)cos(2x)-sec(2x)
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19 ft 17ft 19 ft Volume =​
Elis [28]

Answer:

1,022.83 ft³

Step-by-step explanation:

volume= ⅓×½××19×17×19 = 1,022.83 ft³

3 0
3 years ago
Read 2 more answers
An equation that is satisfied for every value of the variable for which both sides are defined
mote1985 [20]
<span>An equation that is satisfied for every value of the variable for which both sides are defined is called an identity.

For example:
Given the equation
3x + 4 = x + 2(x + 2)

Notice that for any value of x you use, the equation is true.

Thus, this type of equation is called an identity.
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7 0
3 years ago
Solve: StartFraction 10 Over x EndFraction = 2 a. x = 5 c. x = 20 b. x = 10 d. x = 15 Please select the best answer from the cho
choli [55]

Answer:

a. x=5

Step-by-step explanation:

The Fraction is

10/x=2

The unknown from the fraction is x

We need to find the value of the unknown

10/x=2

Cross product

We have,

10=2x

Divide both sides by 2

10/2=2x/2

5=x

x=5

Answer is a. x=5

Check

10/5=2

6 0
3 years ago
What is z to the -6th power
jeka94

Answer:

  • z^(-6) or  1/z^6

Step-by-step explanation:

What is z to the -6th power?

  • z^(-6) = 1/z^6
4 0
2 years ago
A coin bank contains only quarters and dimes. The total value of the coins in the bank is $8.80. If the dimes were quarters and
masha68 [24]

Answer:

  • 18 dimes

Step-by-step explanation:

Let the number of dimes be d and quarters be q

<u>The value is $8.80 = 880¢, so:</u>

  • 10d + 25q = 880 ⇒ 2d + 5q = 176

<u>If the dimes were quarters and the quarters were dimes, the coins' total value would be $7.30 or 730¢</u>

  • 25d + 10q = 730 ⇒ 5d + 2q = 146

<u>Now we have 2 equations. Solving the system by elimination, subtract 5 times the second equation from twice the first equation:</u>

  • 2(2d + 5q) - 5(5d + 2q) = 2(176) - 5(146)
  • 4d - 25d = -378
  • -21d = -378
  • d = -378/-21
  • d = 18
8 0
2 years ago
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