Answer:
49/81
Step-by-step explanation:
(7/9)^2 (Square both the numerator and denominator)
(7^2)/(9^2)
49/81
20 / 2 = 10
15 / 2 = 7.5
10cm by 7.5cm
Hope this helps

The equation representing the given statement is ~
The least number of lawns that he can cut and buy the computer is 10 lawns ~

Total savings should be greater or equal to $ 820 in order to buy the computer,
And his total savinga is equal to ~
Money he saved + money got from cutting lawns.
let's assume the lawns cut by Tyrod be x,
Money earned by cutting lawns is equal to
- total number of lawns cut × $50
total savings is equal to ~
hence,
by solving for " x (number of lawns cut) " we get ~
Hence, the least number of lawns he has to cut is the number that is greater than 9.8, which is
Answer:
64,000 oz
Step-by-step explanation:
A demolition (wrecking) ball is a relatively large dense mass, often spherical, typically swung from a crane, used to demolish buildings or other structures.
We assume you want to convert from a US short ton (2000 pounds) to Avoirdupois ounces (16 ounces per pound).
Then your ball's weight is ...
(2 tons)(2000 lb/ton)(16 oz/lb) = 64,000 oz
Answer:
1) - 2 / (cos x + sinx)^2.
Step-by-step explanation:
1) I assume you want the derivative of (cos x - sin x) / ( cos x + sin x).
y' = (cosx + sinx)( -sinx - cosx) - (cosx - sinx)(-sinx + cosx)
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(cosx + sinx)^2
= -sinxcosx - cos^2x - sin^2x - sinxcosx - (-sinxcosx+cos^2x+sin^2x-sinxcosx
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(cosx + sinx)^2
= -2sinxcosx - 1 - ( -2sinxcosx + 1 ) / (cosx + sinx)^2
= -2sinxcosx - 1 - ( -2sinxcosx + 1 ) / (cosx + sinx)^2
= - 2 / (cos x + sinx)^2.