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antoniya [11.8K]
3 years ago
14

Need help!!! Worth 13 points!

Mathematics
1 answer:
alisha [4.7K]3 years ago
3 0
All you have to do is plug in the given values for a and b.

0.9a - 1.5b = ?

a = 15
b = 3

0.9 (15) - 1.5 (3)

= 13.5 - 4.5

= 9

Note:

•Integers are whole numbers.
For ex: 1, 2, 3, 4...

•Decimals have a period in between 2 numbers
For ex: 0.1, 0.2, 0.3

Sometimes when it’s concerning significant digits then decimals could also be
1.0, 2.0, 3.0 ... I wouldn’t worry about this right now until you get into higher years



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slavikrds [6]
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3 years ago
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Cos (-Ø)= √3/3 sinØ <0 what is the value of sinØ?
Inga [223]

Answer:

sin∅= - √6/3

Step-by-step explanation:

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cos (-∅) = cos ∅

Trigonometric function sin is odd function which mean:

sin (-∅) = - sin∅  => sin∅ < 0

The basic trigonometric equation reads in this case with angle marked ∅:

sin²∅ + cos²∅ = 1  => sin²∅ = 1 - cos²∅ => sin²∅ = 1 - ( √3/3 )² =>

sin²∅ = 1 - (3/9) => sin²∅ = 1 - (1/3) = (3/3) - (1/3) = 2/3 => sin∅ = - √(2/3) =>

sin∅ = - √2/√3 => sin∅ = - √6/3

God with you!!!


3 0
3 years ago
WHAT WOULD THIS BEEE!!
Yuliya22 [10]

use Pythagoras theorem

20 units

8 0
2 years ago
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Step-by-step explanation:

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Solve for the missing item in the following. (Do not round intermediate calculations. Round your answer to the nearest cent.)
iogann1982 [59]

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Answer:

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Step-by-step explanation:

The interest formula is ...

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Solving for P, we find ...

  P = I/(rt) = 200/(0.07·1.5) = 200/0.105 ≈ 1904.76

The principal amount was $1904.76.

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2 years ago
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