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DaniilM [7]
2 years ago
10

If 40 is multiplied by a number identify a number that will give a product less than 40 Explain why you chose this number

Mathematics
1 answer:
zysi [14]2 years ago
3 0

Answer:

Any negative number or decimal, for example, -1, or 0.5

Step-by-step explanation:

-1 multiplied by 40 turns into -40, which is less that 40

0.5 times 40 is 20, which is less that 40

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3 years ago
The answers in my textbook show that using Soh Cah Toa is not right. Unless I'm doing it wrong. Can someone help me please?
Fiesta28 [93]

Answer:

(a) α = 60°, β = 30°

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Step-by-step explanation:

I'll do (a) and (b) as examples.  Make sure your calculator is set to degrees, not radians.

(a) For α, we're given the opposite and adjacent sides, so use tangent.

tangent = opposite / adjacent

tan α = √300 / 10

tan α = √3

α = 60°

Since angles of a triangle add up to 180°, we know that β = 30°.  But we can use tangent again to prove it:

tan β = 10 / √300

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tan β = √3 / 3

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(b) For α, we're given the adjacent side and the hypotenuse.  So use cosine.

cos α = adjacent / hypotenuse

cos α = 15 / 39

cos α = 5 / 13

α ≈ 67.4°

Again, we know that β = 22.6°, but let's show it using trig.  We're given the opposite side and hypotenuse, so use sine:

sin β = 15 / 39

sin β = 5 / 13

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X+y=6 and 2x-y=3. The system of equations ...has no solution, has one solution, or is coincident
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x+y=6

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3 years ago
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