D since it looks pretty difficult
You write it as $101,000.
I will assume that the two equations are
1) y = -x^2 +2x + 4 and 2) x +y = 4
subtract 2 from 1 and you get
y -x - y = -x^2 + 2x + 4 - 4
-x = -x^2 +2x
x^2 -x -2x = 0
x^2 - 3x = 0
x(x-3)=0
x=0 and x - 3 =0
x=0 and x = 3
Then y = 4 - x
y = 4 - 0 and y = 4 -3
y = 4 and y =1
Solutions:
Points (0,4) and (3,1)
Answer:
Middle: 2.5 ft
Right: 4,375 ft
Left: 1,875 ft
Step-by-step explanation:
We know that a tree in the middle is 2.5 feet tall.
Now the tree on the left measures 3/4 of the tree in the middle, therefore:
2.5 * 3/4 = 1.875
Which means that the tree on the left is 1.875 feet tall.
Finally the tree on the right 1 3/4, which would be 1.75 times the tree in the middle, therefore:
2.5 * 1.75 = 4.375
Therefore the tree on the right is 4.375 feet tall.
Answer:
18.4°
Step-by-step explanation:
Use law of cosine.
a² = b² + c² − 2bc cos A
11² = 20² + 28² − 2(20)(28) cos A
121 = 1184 − 1120 cos A
cos A = 0.949
A = 18.4°
