Answer:14x
Step-by-step explanation:
Answer:
56/65.
Step-by-step explanation:
By Pythagoras AB = √(5^2 + 12^2) = √169 = 13.
and AC = √(12^2 + 9^2) = √225 = 15.
sin BAC = sin (BAD + CAD) = sin BAD cos CAD + cos BAD sin CAD.
= 5/13 * 12/15 + 12/13 * 9/15
= 60/195 + 108/195
= 168/195
= 56/65.
Answer:
The scale factor for a model is 5 cm = 16.05 cm.
Step-by-step explanation:
Given:
Model: 9.5cm Actual : 30.5m and the scale factor for model is 5 cm.
Now, we need to find the actual shape for the scale factor 5 cm.
<em>Let the actual shape be
.</em>
Now, for getting the actual shape we set for proportion:
5:x :: 9.5:30.5
5:x = 9.5:30.5
Then, convert it into fractions:

Now, <em>on cross multiplying we get:</em>

Dividing both sides by 9.5 we get:

Therefore, the scale factor for a model is 5 cm = 16.05 cm.
Answer:
x = 5
Step-by-step explanation:
7 + 2.5x = 12 + 1.5x
2.5x - `1.5x = 12 - 7
x = 5