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kirill115 [55]
3 years ago
11

Please help with 2 questions. Thank you.

Mathematics
1 answer:
8_murik_8 [283]3 years ago
8 0

{e}^{ln(anything)}  = anything

so here we have:

{e}^{ln1}  = 1

{e}^{ln5x} = 5x

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In a right triangle, angle C measures 40. the hypotenuse of the triangle is 10 inches long. what is the approximate length of th
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Answer is 7.66"or 7.7"
cos40=x/10
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10*cos40
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3 years ago
Please help need answer for a quiz
torisob [31]

Answer:

first one with -1...21

Step-by-step explanation:

only one that follows quadratic formula format

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3 years ago
Apurse contains S 7.55 in quarters and dimes. There are
borishaifa [10]

Answer:

  • 25 quarters
  • 13 dimes

Step-by-step explanation:

If you subtract the extra 12 quarters from the total, you have $4.55 that can be made up of groups of 1 quarter and 1 dime. Since those groups are worth $0.35, there are $4.55/$0.35 = 13 of them.

There are 13 dimes and 13+12 = 25 quarters in the purse.

5 0
3 years ago
Three lighthouses on three nearby islands flash their lights every evening. On one island, the light flashes every 45 seconds. T
tiny-mole [99]

Lt1 = 45; Lt2 = 120; Lt3 = 75

:

Prime factor each:

45: 3,3,5,

120: 2,2,2,3,5

75: 3,5,5

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4 0
3 years ago
Which expressions are equivalent to 25x^4–64? select three options.
BARSIC [14]
<h2>The equivalent expression of 25x^4 - 64 are "a), b) and c)".</h2>

Step-by-step explanation:

The given expression is:

25x^4 - 64

To find, the equivalent expressions are:

a) 25x^4 + 40x - 40x - 64

=  25x^4 - 64, is the equivalent expression.

b) 25x^4 + 13x - 13x - 64

=  25x^4 - 64, is the equivalent expression.

c) (5x^2 + 8)(5x^2 - 8)

Using the algebraic identity,

(a + b)(a - b) = a^{2}-b^{2}

= (5x^2)^2-8^2

=  25x^4 - 64, is the equivalent expression.

d) (x^2 + 13)(x^2 - 13)

Using the algebraic identity,

(a + b)(a - b) = a^{2}-b^{2}

= (x^2)^2-13^2

=  x^4 - 169, is not a equivalent expression.

e) (5x^2-8)^2

Using the algebraic identity,

(a-b)^{2} =a^{2} -2ab+b^2

= (5x^2)^{2} -2(5x^2)(8)+8^2

= 25x^4 -80x^2+64,  is not a equivalent expression.

∴ The equivalent expression of 25x^4 - 64 are "a), b) and c)".

6 0
4 years ago
Read 2 more answers
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