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IRINA_888 [86]
3 years ago
12

7 What is the value of the expression -3x^2 y +4x when x = -4 and y = 2

Mathematics
1 answer:
love history [14]3 years ago
7 0
<span> -3x^2 y +4x 
</span><span> =-3(-4)^2 (2) + 4(-4)
=-96-16
=-112</span>
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Example 24 In a school there are 20 teachers who teach mathematics or physil
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Answer:

The number of teachers who teach  physics   n(P) = 12

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given that the number of teachers who teach mathematics or physics

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Given that  the number of teachers who teach mathematics

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Given that the number of teachers who teach both mathematics and physics

n(M∩P) = 4

<u><em>Step(ii):-</em></u>

By using   n(A∪B) = n(A) + n(B) - n(A∩B)

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<u><em>Final answer:-</em></u>

The number of teachers who teach  physics   n(P) = 12

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For what values ​​does c have no solutions?
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