Step-by-step explanation:
well,
23 < 12 + 0.04×x
11 < 0.04×x
11/0.04 < x
275 < x
x > 275 or x >= 276
so, for more than 275 monthly calls (that means 276 or higher) plan 1 is more economical.
at 275 calls is is plain even between both plans.
for fewer calls than 275 plan 2 is more economical.
One square grid has an area of 400.
Another square grid has an area of 256.
The area of the third grid can be:
(squares in third grid) + 256 = 400
OR
256 + 400 = (squares in third grid)
We get this by applying the Pythagorean theorem.
So, the squares in the third grid can either be 144 or 656. And we only have 144 as an option, so that is your answer.
Your final answer is D. 144.
To answer the question above, let x be the number of palettes of the roofing material that one elevator trip may carry.
The inequality expression that satisfy the condition above will then be,
195 + 425x ≤ 2,320
Solving for x gives x ≤ 5. Thus, the maximum number of palettes of roofing materials that may be brought is 5.
The answer to this question is -32
2 x -2 x 2 = -8
+ 3 x -3 x 3 = -9
- (-2) x 2 = -4
+ 4 x 5 x 2 = 40
- (-2) x 2 = -4
So then -8 + (-9) - (-4) + 40 - (-4) = 31
Glad I can help :)
