Answer:
x = 3
Step-by-step explanation:
3x + 2 = 11
-2 -2
3x = 9
÷3 ÷3
x = 3
Answer:
m > 550
Step-by-step explanation:
0.80m > 55+0.70m
0.10m > 55
m > 55/0.10 = 550
A costs more when you drive more than 550 miles.
<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>
Answer:
1. B) 7
2. B) {y|y ≤ -1}
Step-by-step explanation:
1. Put -4 where x is in the function definition and do the arithmetic.
... 3 - (-4) = 3 +4 = 7
2. If the maximum function value is -1 and the values extend to -∞ from there, then the range is (-∞, -1]. In your notation, that is ...
... {y | y ≤ -1}
