Before we do this problem, let's go over a little algebra terminology.
The number in front of your variable is called your <em>coefficient </em>and notice that the <em>x</em> at the end of the problem does not have a coefficient.
When that happens, when there is no number in front of your variable, you can put a 1 there to fill that position. So -x can be thought of as -1x.
Next let's change all our minus signs to plus negatives.
So the problem reads 3x + 5 + 7x + -3 + -1x + 2.
Now let's simplify this by combining like terms.
We can combine our "x" terms first.
3x + 7x + -1x simplifies to +9x.
Now, 5 + -3 + 2 simplifies to 4.
So our answer is 9x + 4.
Answer:
40.5
Step-by-step explanation:
Area of square is 9x9=81.
Area of triangle is 1/2(9)(9)=40.5
81-40.5=40.5
40.5 is the area of the shaded region.
Answer:
C
Step-by-step explanation:
3x-y=14
4x+y=21
add
7x=35
x=35/7=5
4×5+y=21
y=21-20=1
so (5,1 ) is the solution.
Answer:
Its the middle choice
Step-by-step explanation:
1/10 is half of 1/5
1/5 × 1/2 = 1/10
3 pieces × 2 = 6 pieces that are 1/10
