Answer:
A>2 = X
If you simplify this then it just means A=X but A is more then 2.
I think ...
Answer:
- you - 4 rocks and 16 fossils
- friend - 12 rocks and 8 fossils
Step-by-step explanation:
Let the rock be r and the fossil be f
<u>Equations</u>
- You: r + f = 20
- Friend: 3r + 1/2f = 20
<u>Double the second equation and subtract the first one:</u>
- 2(3r + 1/2f) - (r - f) = 2*20 - 20
- 6r - r = 20
- 5r = 20
- r = 4
<u>Then find f:</u>
So you collect 4 rocks and 16 fossils
<u>Friend collects:</u>
- 4*3 = 12 rocks and
- 1/2*16 = 8 fossils
Answer:
Equation is x^2/576+y^2/400=1
Vertical height is 19.84inches
Step-by-step explanation:
The equation of an ellipse with horizontal major axis with center at (0,0) is x^2/a^2+y^2/b^2=1
From the question, a=24 and b=20
Therefore the equation of the ellipse = x^2/24^2+y^2/20^2=1
= x^2/576+y^2/400=1
To calculate vertical height y:
y^2/400=1- x^2/576
y^2=(1- x^2/576)*400
y=20√(1- x^2/576)
At x=3 inches from the centre
y=20√1-0.0156
y=20*0.9922
y=19.84inches
Answer:
30 pages
Step-by-step explanation:
Knowing she wrote 12 pages in 4 hours, we can do 12/4 to get 3 pages per hour. Multiply 3 pages by the 6 hours she spends writing and you get 18 pages in 6 hours. Add 12 pages and 18 pages and you have 30 pages.
