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Colt1911 [192]
2 years ago
12

If 2x +y=-7 and 3x=6+4y are simultaneous equation, what is the value of x-y​

Mathematics
1 answer:
Aleks04 [339]2 years ago
7 0
Multiply by 48x+4y=28 3x-4y=6
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A number cube is rolled 198 times. How many times would you expect to roll a 5?
Otrada [13]

Answer:

33 times

Step-by-step explanation:

we divide 198 by 6 because there are 6 sides on a dice and 199 ÷ 6 is 33

3 0
3 years ago
56 divided by 7 jdjcjdjdjdjfjjfhfjfhfjfhfufgdjssgjsjshsjwiwh
mrs_skeptik [129]
Its 8.
 
       _08___
   7 /  56
         56
-----------------
          0 <--- Leftover

So the answer is 8! Hope it helps! :D
6 0
3 years ago
If a+b+c=0 for a,b,c then prove a²/bc+b²/ca+c²/ab=3.
Ierofanga [76]
According to the identity if a+b+c=0
then a3+b3+c3=3abc
a3+b3+c3/abc=3
a2*a/bc*a+b2*b/ca*b+c2*c/ab*c=3
cancel a,b,c in   all the fraction then you get
<span>a²/bc+b²/ca+c²/ab=3. 
</span>hence proved


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3 years ago
The following graph represents the cost and revenue functions for custom made computers. How many computers have been sold at th
svetlana [45]
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The answer is 39 
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