-x^2+105x-1050=1550
We move all terms to the left:
-x^2+105x-1050-(1550)=0
We add all the numbers together, and all the variables
-1x^2+105x-2600=0
a = -1; b = 105; c = -2600;
Δ = b2-4ac
Δ = 1052-4·(-1)·(-2600)
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
<span><span>x1</span>=<span><span>−b−<span>Δ√</span></span><span>2a</span></span></span><span><span>x2</span>=<span><span>−b+<span>Δ√</span></span><span>2a</span></span></span>
<span><span>Δ<span>−−</span>√</span>=<span>625<span>−−−</span>√</span>=25</span>
<span><span>x1</span>=<span><span>−b−<span>Δ√</span></span><span>2a</span></span>=<span><span>−(105)−25</span><span>2∗−1</span></span>=<span><span>−130</span><span>−2</span></span>=+65</span>
<span><span><span>x2</span>=<span><span>−b+<span>Δ√</span></span><span>2a</span></span>=<span><span>−(105)+25</span><span>2∗−1</span></span>=<span><span>−80</span><span>−2</span></span>=+40</span></span>
Answer is $5.25
35x.85=29.75
35.29.75= 5.25
Answer:
H. k = 3
Explanation:
3k - 5 = 0.8k + 3( 2 - k ) + 4.6
30k - 50 = 8k + 30( 2 - k ) + 46
30k - 50 = -22k + 106
30k = -22k + 156
52k = 156
k = 3
Answer:
I guess 7/2
Step-by-step explanation:
2x - 7 = 0
2x = 7
x= 7/2 ?
You didnt give us what the equation equals to
Answer:
The answer is just 90 degrees.
Step-by-step explanation:
All tangents create a 90 degree angle.