PLEASE HELP I've tried putting all my working out into the box but it said wrong to..
1 answer:
Answer:
£59.25
Step-by-step explanation:
It appears you can measure the height of the trapezoid [trapezium :-) ??]. If you can't, you can use the Pythagorean Theorem (image attached). Draw a line from the upper right-hand corner down to the baseline--the 20m side. You'll form a right triangle with one leg <em>h</em> , hypotenuse 17m and the other leg 8m (the difference between 20m and 12m).
(leg)^2 + (leg)^2 = (hypotenuse)^2
<em>h</em>^2 + 8^2 = 17^2
h^2 + 64 = 289
h^2 = 225
h = 15m
The area of the trapezium is where the <em>b</em>'s are the lengths of the two bases (upper and lower sides).
m^2
One can of weedkiller covers 100 m^2 of area. You'll need 3 cans (2 cans isn't enough, and you can't buy a fraction of a can). Tricky question!
Three cans will cost 3 x 19.75 pounds = £59.25
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Answer:
D
Step-by-step explanation:
you want to solve it out
start with multiplying z to each. you don't multiply it to the 6 because it is in the same parenthesis set, but you multiply it to everything in the other set. After multiplying, you get: ,
,
now do that to the 6. After multiplying you get: ,
,
now set it all next to each other +
+
+
+
+
now combine like terms. start with the to the highest power. since there is only one that has a third power, you put that one first. then you combine the squared ones, and so forth.
work combining the squares:
work combing the single z's:
to get this: +
+
+
so, the answer is D