I beleive it is a because both variable could change
mark must leave it for 5.5 months or 5 and half moths to gain 5600 in interest .
<u>Step-by-step explanation:</u>
Here we have , mark invests 8000 in an account that pays 12% interest and 2000 in one that pays 8%. if he leaves the money in the accounts for the same length of time, We need to find how long must he leave it to gain 5600 in interest . Let's find out:
Let mark invests 8000 in an account that pays 12% interest and 2000 in one that pays 8% for time x months , So total interest gain is 5600 i.e.
⇒ ![\frac{8000(12)}{100}(x) +\frac{2000(8)}{100}(x) =5600](https://tex.z-dn.net/?f=%5Cfrac%7B8000%2812%29%7D%7B100%7D%28x%29%20%2B%5Cfrac%7B2000%288%29%7D%7B100%7D%28x%29%20%3D5600)
⇒ ![\frac{8000(12)+2000(8)}{100}(x) =5600](https://tex.z-dn.net/?f=%5Cfrac%7B8000%2812%29%2B2000%288%29%7D%7B100%7D%28x%29%20%3D5600)
⇒ ![(80(12)+20(8))(x) =5600](https://tex.z-dn.net/?f=%2880%2812%29%2B20%288%29%29%28x%29%20%3D5600)
⇒ ![(960+160)(x) =5600](https://tex.z-dn.net/?f=%28960%2B160%29%28x%29%20%3D5600)
⇒ ![(1020)(x) =5600](https://tex.z-dn.net/?f=%281020%29%28x%29%20%3D5600)
⇒ ![x =\frac{5600}{1020}](https://tex.z-dn.net/?f=x%20%3D%5Cfrac%7B5600%7D%7B1020%7D)
⇒ ![x =5.5](https://tex.z-dn.net/?f=x%20%3D5.5)
Therefore , mark must leave it for 5.5 months or 5 and half moths to gain 5600 in interest .
Answer:
B
Step-by-step explanation:
this is a rate of time, 60 must be multiplied by the hours to get the days
Answer:
The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept.
Step-by-step explanation:
The y-intercept of this line is the value of y at the point where the line crosses the y axis.