Answer:
50 people
Step-by-step explanation:
100-70 is 30. 30-20 is 10. 60-10 is 50.
When you multiply the numerator and denominator by the same number, you get an equivilent fraction
Answer:
Step-by-step explanation:
<u>Area of ΔABC is:</u>
<u>We have:</u>
<u>Find CD using Pythagorean:</u>
- CD² = AC² - AD² ⇒ CD² = 3² - 1.8² ⇒ CD² = 5.76 ⇒ CD = √5.76 = 2.4
<u>Find DB using the following identity, coming from ratios of corresponding sides of similar triangles:</u>
- CD² = AD*DB
- 5.76 = 1.8*DB
- DB = 5.76/1.8
- DB = 3.2
<u>Find AB:</u>
- AB = AD + DB
- AB = 1.8 + 3.2
- AB = 5
<u>Find the area of ΔABC:</u>
- A = 1/2*5*2.4
- A = 6 units²
Y1 is the simplest parabola. Its vertex is at (0,0) and it passes thru (2,4). This is enough info to conclude that y1 = x^2.
y4, the lower red graph, is a bit more of a challenge. We can easily identify its vertex, which is (-4,0), and several points on the grah, such as (2,-3).
Let's try this: assume that the general equation for a parabola is
y-k = a(x-h)^2, where (h,k) is the vertex. Subst. the known values,
-3-(-4) = a(2-0)^2. Then 1 = a(2)^2, or 1 = 4a, or a = 1/4.
The equation of parabola y4 is y+4 = (1/4)x^2
Or you could elim. the fraction and write the eqn as 4y+16=x^2, or
4y = x^2-16, or y = (1/4)x - 4. Take your pick! Hope this helps you find "a" for the other parabolas.
To calculate the circumference,the equation is : 2丌r
Thus,the equation of the above would be
2丌(1)
=2丌
2丌 should be the answer,however if you cannot type that,try the ones below:
If you are to find a value,we generally use 3.14 or 7/22 for 丌
therefore the answer could be 6.28 or 7/11 as well.
Hope it helps!