The equation for the cost after 2014 will be : Cost(x) = 8.50 + 0.8n
The cost of pass on 2014 = $8.50
Increase in cost per year = $0.80
The equation which represents the yearly cost starting from 2015 will be :
Cost in 2014 + (yearly increas × number of years after 2014)
Let the Number of years after 2014 = n
The equation thus becomes :
Cost(x) = 8.50 + 0.8n
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Answer: The other sides are 6.7 units and 7.4 units
Step-by-step explanation: Every right angled triangle can be solved by use of the trigonometric ratios. We can use the sine, cosine or tangent depending on which sides are given. If one angle has been given as 42 degrees, then the side opposite that angle can be calculated as,
Sin 42 = opposite/hypotenuse
Sin 42 = a/10
We cross multiply and we now have
Sin42 x 10 = a
0.6691 x 10 = a
a = 6.69 (which is approximately 6.7)
If one of the other two angles was given as 42, then the third angle would be calculated as 180 - (90 + 42) {sum of angles in a triangle equals 180} and that equals 48.
To calculate the third side,
Sin48 = opposite/hypotenuse
Sin48 = y/10
We cross multiply and we have
Sin48 x 10 = y
0.7431 x 10 = y
y = 7.43 (which is approximately 7.4)
Therefore the two other sides are 6.7 and 7.4
Answer:
x12×x5x×x-2×9) ____=((140)5
60x × (x-18)x _______=(140)5
60x×x-10x _______=(140)5
60x-18x______=140×5
42x_______=700
42x-42x ____=700-42x
658x
Answer: see #7 below
<u>Step-by-step explanation:</u>
7. ΔABC ≅ ΔDBC 7. SAS Similarity Theorem
A much easier way to prove these triangles are similar is to add either #3 or #5:
Statement Reason
3. ∠A ≡ ∠D 3. Corresponding Angles Postulate
or
5. ∠C ≡ ∠E 5. Corresponding Angles Postulate
to prove
7. ΔABC ≅ ΔDBC 7. AA Similarity Theorem
Answer:
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