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olga2289 [7]
3 years ago
12

X/4(-2+y-y):use x=-4,and y=6

Mathematics
1 answer:
Temka [501]3 years ago
6 0

Answer:

2

Step-by-step explanation:

Substitute x = - 4 and y = 6 into the expression

\frac{-4}{4} (- 2 + 6 - 6 )

= - 1(- 2)

= 2

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A rational expression is undefined whenever its numerator is zero.
kipiarov [429]

Answer:

False

Step-by-step explanation:

for a rational number expressed as (A / B) where A & B are integers

if the numerator (A) is zero, then (A/B) is simplify zero

i.e (A / B) = (0 / B) = 0

however if the denominator (B) is zero, then by definition any value divided by zero is undefined.

(A / B) = (A / 0) = {undefined}

7 0
3 years ago
A horse galloped at a rate of 42 mph at this rate what is the closest to the number of meters that the horse for travel in a sec
a_sh-v [17]
Convert miles/hour to meters/second: 42mi/hr(0.447) = 18.77m/sec
6 0
4 years ago
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In countries that use the metric system of measurement, corn yields are sometimes expressed in quintals per hectare (q/ha) inste
Fittoniya [83]

Answer:

The answer is below

Step-by-step explanation:

Different countries have different metric system of measurement, but the metric system of measurement accepted all over the world is the international system of unit (SI unit)

1 quintal =  220.462 lbs and 1 bushel of corn = 56 lbs.

151 q/ha = (151 × 220.462) lbs/ha = 33289.762 lbs/ha

But 1 hectare = 2.471 acre, hence:

33289.762 lbs/ha = \frac{33289.762\ lbs}{1\ ha*\frac{2.471\ acre}{1 \ ha} } =13472.182\ lbs/acre

Since 1 bushel of corn = 56 lbs, hence:

13472.182\ lbs/acre=\frac{13472.182\ lbs*\frac{1\ bushels}{56\ lbs} }{acre}=240.6\ bushels/acre = 240.6 bu/ac

For a Margin of Error: +/- 1 bu/ac, the bushels per acre = (239.6 bu/ac, 241.6 bu/ac)

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