Answer:
m = -4, b = -12
Step-by-step explanation:
m is slope and it is the coefficient of x
b is the y intercept
<h3>
Answer:</h3>
-4 on the negative side on 4
and -2 1/2 between -2 and -3 in the middle
Step-by-step explanation
I hope this helps :)
Answer:
0.133 ml
Step-by-step explanation:
The two available solutions to be used in the mixture are a 70% solution and a 85% solution
.
x = volume of 70% solution
y = volume of 85% solution
y = 2 ml
Therefore;
0.7 x + 0.85(2) = 0.75(x+2)
0.7x + 1.7 = 0.75x + 1.5
multiply through by 10 to get rid of the decimals
7x + 17 = 7.5x +15
collecting and simplifying
-0.5 x = -0.2
divide both sides by -1.5
x = -0.2/-1.5
x = <u>2/15 ml or 0.1333 ml</u>
<span>there are 100 centimeters in a meter.
therefore 2.5 meters = 2.5 * 100 = 250 centimeters.
x = the length of the first board.
2x + 18 = the length of the second board.
x - 12 = the length of the third board.
x + 4 = the length of the fourth board.
the total length of all the boards is equal to 5x + 10,
since the total length of the board is 250 centimeters, then you get:
5x + 10 = 250
</span><span>solve for x to get x = 48 centimeters.
the 4 board lengths are:
x = 48
2x + 18 = 114
x - 12 = 36
x + 4 = 52
add them up and you get a total of 250 centimeters.
250 centimeters / 100 = 2.5 meters.
this confirms the solution is good.
</span>
270 + 63 = 333
If you did it in your head, it would look like this:
9(30) + 9(7)
270 + 63 = 333
