Answer: She has 17 ostriches.
Step-by-step explanation:
We know , ostrich has 2 legs where as llama has 4 legs.
Let x be the number of ostriches and y be the number of llamas.
Then, as per given , we have the following linear equations :

Multiply 2 to eqn (ii) , we get

Subtract (iii) from (i) , we get

Put this in (ii) , we get 
Hence, there are 17 ostriches and 16 llamas.
Answer:
The correct answer is Y = 26
Answer:
D
Step-by-step explanation:
4x^4+3x^2-3x^3-3x+1
Assuming LCD means Lowest Common Denominator
Assuming by "and" you mean adding the two
Well, you go by the multiples of 7;
7, 14, 21, 28, 35, 42, 49, 56, 63,<u> 70</u>
Multiples of 10;
10, 20, 30, 40, 50, 60, <u>70</u>, 80, 90, 100
Straight away you can see the lowest common multiple is 70,
Now to go about adding them,
2/7 * 10 (both sides) , 20/70
9/10 * 7 (both sides) , 63/70
Then you add the two; 20/70 + 63/70 - now we can add them because they share the same denominator
20/70 + 63/70 = 83/70 = 1 whole 13/70 (simplified)
<u>The LCD is 70
Quick tip, </u>to find a common multiple (not necessarily the lowest) multiply the two denominators.