Answer:
x = -12
Step-by-step explanation:
Let x be the number.
The product of 5 and x increased by 9 is equal to 15 less than 3 times x.
5x + 9 = 3x - 15.
We can isolate x, getting (5-3)x = -15-9
Then we can solve:
2x = -24
x = -12.
Answer:
a+ 5a = 2a + 9
<=> 6a -2a = 9
<=> 4a = 9
<=> a = 9/4
=> have one solution
Step-by-step explanation:
Answer:
60?
Step-by-step explanation:
Answer:
I don't get what you are trying to ask.
Step-by-step explanation:
The quadratic formula is:
![x = \frac{-b \pm\sqrt{b^2-4ac} }{2a}\\](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B-b%20%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%5C%5C)
A, in this case, is -2.
B is 5
C is -11
x = ![\frac{-5 \pm\sqrt{5^2-4(-2)(-11)} }{2(-2)}](https://tex.z-dn.net/?f=%5Cfrac%7B-5%20%5Cpm%5Csqrt%7B5%5E2-4%28-2%29%28-11%29%7D%20%7D%7B2%28-2%29%7D)
x = ![\frac{-5\pm\sqrt{25 -88} }{-4}\\](https://tex.z-dn.net/?f=%5Cfrac%7B-5%5Cpm%5Csqrt%7B25%20-88%7D%20%7D%7B-4%7D%5C%5C)
x = ![\frac{-5\pm\sqrt{-63}}{-4}](https://tex.z-dn.net/?f=%5Cfrac%7B-5%5Cpm%5Csqrt%7B-63%7D%7D%7B-4%7D)
x =
and ![\frac{-5-i\sqrt{63} }{-4}](https://tex.z-dn.net/?f=%5Cfrac%7B-5-i%5Csqrt%7B63%7D%20%7D%7B-4%7D)
We can break up the fraction to make it easier on our eyes
x = ![\frac{5}{4}\pm\frac{i\sqrt{63} }{4}](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B4%7D%5Cpm%5Cfrac%7Bi%5Csqrt%7B63%7D%20%7D%7B4%7D)
≈1.9843
x = ![1.25 + 1.9843i\\1.25 - 1.9843i](https://tex.z-dn.net/?f=1.25%20%2B%201.9843i%5C%5C1.25%20-%201.9843i)