Answer:
1. Isosceles Triangle
2. ∠D = 160°
Step-by-step explanation:
1.
7x + 5 + x + 20 + 2x + 5 = 180 (all angles in a triangle add up to 180)
10x = 150
x = 15°
∠A = 7x + 5
sub x = 15°
∠A = 7x + 5
∠A = 120°
∠B = x + 20
x = 15
∠B = 35
∠C = 2x + 5
x = 15
∠C = 35
Base angles are the same, so this triangle is isosceles
2.
3x + (2x - 1) + (x + 3) + (3x - 3) + (x - 2) = 540 (all angles in a 5-sided polygon equals 540°)
10x = 540 + 1 - 3 + 3 + 2
10x = 543
x = 54.3
∠D = 3x - 3
x = 54.3
∠D = 159.9
if you round it, it would about 160°
Answer:
y=1/4x+5
Step-by-step explanation:
Answer:
58.33 miles per hour
Step-by-step explanation:
I hope this help you
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Answer:
So possibilities of zeroes are:
Positive Negative Imaginary
1 1 2
3 1 0
Zeroes = -1.4549, 1.2658, 0.34457-1.0503i, 0.34457+1.0503i.
Step-by-step explanation:
Note: Descartes' Rule of Signs is used to find the signs of zeroes not the exact value.
The given function is
Degree of polynomial is 4 so number of zeroes is 4.
There are three sign changes, so there are either 3 positive zeros or 1 positive zero.
Now, put x=-x in f(x).
There is one variation in sign change, so there is 1 negative zero.
So possibilities of zeroes are:
Positive Negative Imaginary
1 1 2
3 1 0
Using graphing calculator the zeroes of given function are -1.4549, 1.2658, 0.34457-1.0503i and 0.34457+1.0503i.