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antoniya [11.8K]
3 years ago
15

HELPPP quick math question

Mathematics
1 answer:
emmasim [6.3K]3 years ago
4 0

e^{-.15x}=.42

ln e^{-.15x}= ln (.42)

-.15x = ln(.42)

x = ln(.42)/-.15

x=5.78333718

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Eight and three fourths minus five and one sixth equals ?
Alex
Three and seven twelfths 

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86/24
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Answer:

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krok68 [10]

Answer:

Z = - 2, Y = 0, X = 0

Step-by-step explanation:

2X – Y + Z = – 2

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isolate "X" in the first equation

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X = - 1 - Z/2 + Y/2

substitute this value of X in the second two equations (applying the substitution method here)

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isolate Y in the second equation (6Y - 7Z - 6 = 8) and substitute in the third equation (Y + 9Z + 6/2 = - 6)

6Y - 7Z - 6 = 8 => isolate 6Y

6Y = 14 + 7Z => divide either side by 6

Y = 7Z + 14/6 => substitute in second equation

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61Z + 50/12 = - 6, Z = - 2

substitute the value of Z into the equations "Y = 7Z + 14/6" and using the value of Y and Z, substitute into "X = - 1 - Z/2 + Y/2"

Y = (7(- 2) + 14)/6 = 0 / 6

= 0

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= - 1 + 1 + 0 = 0

6 0
2 years ago
A parallelogram can have one pair or two pairs of parallel sides
Rudiy27

Answer:

A parallelogram can have 2 pairs of parallel sides.

Step-by-step explanation:

Think of a rectangle for a parallelogram. It has 2 pairs of parallel sides which makes it a parallelogram. The same for a square as well as it has 2 parallel pairs. Just remember that a parallelogram always has 2 pairs of parallel sides.

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3 years ago
this is a shorthand way of writing very large or very small numbers in which the number is expressed as a number between 1 and 1
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Answer:

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Step-by-step explanation:

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