D. 4, -3 Because you plug in 4 for the x and 2•4 is 8, then you subtract 8 from both sides of the equal sign. (20-8=12) then you’re left with -4y = 12 divide by -4 on both sides of the equal sign, and y= -3 (and you’re already given the value of x)
Answer:
V = 175
Step-by-step explanation:
Look at the attachment
It's not hard if remember a couple of things that you should have learned \before you ran into this problem. Here they are:
1). ' 10% ' means 10/100 , or 0.1
2). In middle school math,"of" almost always means "times".
Now that you know those two things, you can use them to re-write the problem:
" 10% of 120 " means " <em>0.1 times 120</em> ".
I'm sue you can solve that.
Answer:
The width of the field is 4x + 20 / x² -2x -3 yards
Step-by-step explanation:
The area of a rectangular field is given by the following formula:
area = length*width
In this case we want to find the width of this field, therefore if we isolate the width in the expression above we will have a suitable expression:
width*length = area
width = area / length
So applying the data from the problem, we have:
width = [(2x + 6)/(x + 1)] / [(x² - 9)/(2x + 10)]
width = [(2x + 6)/(x + 1)]*[(2x + 10)/(x² - 9)]
width = 2(x + 3)*(2x + 10) / (x+1)*(x - 3)*(x + 3)
width = 2*(2x + 10) / (x + 1)*(x - 3)
width = 4x + 20 / x² -2x -3
208/375 that is the answer