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Serhud [2]
3 years ago
6

If f(x) = - 4x and g(x)= 5x?, find a. (f+g)(x) b.(-9)(x) C. (fog)(x)

Mathematics
1 answer:
o-na [289]3 years ago
8 0

a) (f+g)(x) = f(x) + g(x) = -4x + 5x = x

b) -9(x) = -9x? I have no idea what this means.

c) (f o g)(x) = (f(g(x)) = f(5x) = -4 (5x) = -20x

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The x intercept ? I think this is what you mean
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(x + 2) __x – 2__ = x2 - 4
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7 0
3 years ago
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A boat sails on a bearing of 038°anf then 5km on a bearing of 067°.
I am Lyosha [343]

This question is not complete

Complete Question

A boat sails 4km on a bearing of 038 degree and then 5km on a bearing of 067 degree.(a)how far is the boat from its starting point.(b) calculate the bearing of the boat from its starting point

Answer:

a)8.717km

b) 54.146°

Step-by-step explanation:

(a)how far is the boat from its starting point.

We solve this question using resultant vectors

= (Rcos θ, Rsinθ + Rcos θ, Rsinθ)

Where

Rcos θ = x

Rsinθ = y

= (4cos38,4sin38) + (5cos67,5sin67)

= (3.152, 2.4626) + (1.9536, 4.6025)

= (5.1056, 7.065)

x = 5.1056

y = 7.065

Distance = √x² + y²

= √(5.1056²+ 7.065²)

= √75.98137636

= √8.7167296826

Approximately = 8.717 km

Therefore, the boat is 8.717km its starting point.

(b)calculate the bearing of the boat from its starting point.

The bearing of the boat is calculated using

tan θ = y/x

tan θ = 7.065/5.1056

θ = arc tan (7.065/5.1056)

= 54.145828196°

θ ≈ 54.146°

7 0
3 years ago
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Given that we have deduced the number of students who passed in two subjects, we can now solve for the number of students who passed only one subject. 
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                Mathematics = 12 - (4 + 3 + 2) = 3
                Science = 8 - (4 + 3 + 0) = 1

1. In English but not in Science,
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2. In Mathematics and Science but not in English
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3. In Mathematics only 
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3. More than one subject only
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It will really be helpful if you draw yourself a Venn Diagram for this item. 
8 0
3 years ago
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4 0
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