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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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Find the exact value of the trigonometric expression when
Vedmedyk [2.9K]

Part of the value of sin(u) is cut off; I suspect it should be either sin(u) = -5/13 or sin(u) = -12/13, since (5, 12, 13) is a Pythagorean triple. I'll assume -5/13.

Expand the tan expression using the angle sum identities for sin and cos :

tan(u + v) = sin(u + v) / cos(u + v)

tan(u + v) = [sin(u) cos(v) + cos(u) sin(v)] / [cos(u) cos(v) - sin(u) sin(v)]

Since both u and v are in Quadrant III, we know that each of sin(u), cos(u), sin(v), and cos(v) are negative.

Recall that for all x,

cos²(x) + sin²(x) = 1

and it follows that

cos(u) = - √(1 - sin²(u)) = -12/13

sin(v) = - √(1 - cos²(v)) = -3/5

Then putting everything together, we have

tan(u + v)

= [(-5/13) • (-4/5) + (-12/13) • (-3/5)] / [(-12/13) • (-4/5) - (-5/13) • (-3/5)]

= 56/33

(or, if sin(u) = -12/13, then tan(u + v) = -63/16)

5 0
3 years ago
Accounts receivable changes with bad debts A firm is evaluating an accounts receivable change that would increase bad debts from
zaharov [31]

Answer:

a) curently                  $ 20,000

  proposed scenario $ 64,000

b)   differential               $ 44,000

c) and d)

differential contribution:

30,000 units x ($20 - 15) = 150,000

then, we subtract the 44,000 bad debt and add the 3,500 cost savings.

150,000 3,500 cost savings - 44,000 bad debt = 114,500

It would be recomented As with the contribution from sales will increase by 114,500

Step-by-step explanation:

expected sales 80,000 units  at $20 each

bad debt will be 4% os sales:

80,000 x $20 x 4% = $64,000

before, the bad debt were:

50,000 units at $20 with 2% bad dbet

50,000 x $20 x 0.02 = $20,000

7 0
4 years ago
I need help please <br> For PreCal
natulia [17]
Should be tan positive 30
7 0
3 years ago
Please help
Pepsi [2]

Answer:

These triangles have scale factor 2 : 1 from big one to the small one.

Hope it helps.

5 0
3 years ago
Read 2 more answers
Solve (4+4)*(1+1). please ASAP​
vlada-n [284]

Answer:

(4+4) = 8 (1+1) = 2 then 8 x 2 = 16

so your answer is 16

Step-by-step explanation:

you can use PEMDAS to solve equations like this

7 0
3 years ago
Read 2 more answers
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