Answer:
false
Step-by-step explanation:
96,240
a-9
2,3
8,9
The Second Choice I think
Answer: the mathematical equation in very probomatic the answer is already a solution to your equtivented question. 15 miles in 45 minutes then the fortentea of 60 minutues, for mathematical troduction the answer 15/45^)60)=567/(}9}10ths of a mile}xtimes the matter of 67} over 56|=34x4milespersecound-34.=4r%~times the sectation matter
Step-by-step explanation:
21) 3(2j-k)=108 It is asking you to set the equation equal to j
distribute the 3
6j-3k=108
move k to the other side by adding on both sides
6j=108+3k
divide everything by 6
j=18+0.5k
Answer:
<h2>The x-interecepts are 5.6 and -1.4, approximately.</h2>
Step-by-step explanation:
The given equation is
![5x^{2} -21x=39](https://tex.z-dn.net/?f=5x%5E%7B2%7D%20-21x%3D39)
Where
,
and
, let's use the quadratic formula
![x_{1,2}=\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a} =\frac{-(-21) (+-)\sqrt{(-21)^{2} -4(5)(-39)} }{2(5)}\\ x_{1,2}=\frac{21(+-)\sqrt{441+780} }{10}=\frac{21(+-35)}{10}\\x_{1}=\frac{21+35}{10}=\frac{56}{10} \approx 5.6\\ x_{2}=\frac{21-35}{10}=\frac{-14}{10} \approx -1.4](https://tex.z-dn.net/?f=x_%7B1%2C2%7D%3D%5Cfrac%7B-b%28%2B-%29%5Csqrt%7Bb%5E%7B2%7D-4ac%20%7D%20%7D%7B2a%7D%20%3D%5Cfrac%7B-%28-21%29%20%28%2B-%29%5Csqrt%7B%28-21%29%5E%7B2%7D%20-4%285%29%28-39%29%7D%20%7D%7B2%285%29%7D%5C%5C%20x_%7B1%2C2%7D%3D%5Cfrac%7B21%28%2B-%29%5Csqrt%7B441%2B780%7D%20%7D%7B10%7D%3D%5Cfrac%7B21%28%2B-35%29%7D%7B10%7D%5C%5Cx_%7B1%7D%3D%5Cfrac%7B21%2B35%7D%7B10%7D%3D%5Cfrac%7B56%7D%7B10%7D%20%5Capprox%205.6%5C%5C%20%20x_%7B2%7D%3D%5Cfrac%7B21-35%7D%7B10%7D%3D%5Cfrac%7B-14%7D%7B10%7D%20%5Capprox%20-1.4)
Therefore, the x-interecepts are 5.6 and -1.4, approximately.