2x+3=17
subtract 3 from each side
2x+3 -3 = 17 -3
2x = 14
divide by 2 on each side
2x/2 = 14/2
x = 7
Answer:
Step-by-step explanation:
We begin with :
First, let us add the two portions within the brackets. To do this, we need to just combine the like terms
Next, we need to distribute the negative to all the terms within the brackets
Now we can combine the like terms again
Answer:
The firsts one is -93
The second is -20
Step-by-step explanation:
Just add the numbers yo each number togetherput a negative sign in front and you have your answer. For how to add a negative.
<em>Note</em><em> </em><em>If two negative numbers are multiplied together or divided, the answer is positive. If a positive and a negative number are multiplied or divided, the answer is negative.</em>
How many points are there total? (3*100)+250 = 550
So far, he has 72 + 85 + 78, or 235
He needs 0.80 * 550 for a B, or 440 points
440 - 235 = 205 points on the final to get a B
Percentage-wise, he needs 205/250, or 0.82