3 years ago

Is the equation conditional, an identity, or a contradiction? y - 11 + 3y = 6y + 4

Mathematics

1 answer:

ipn [44]3 years ago

8 0

Answer:

The equation is a conditional.

y = 7.5

Step-by-step explanation:

y - 11 + 3y = 6y + 4

4y - 11 = 6y + 4

4y - 4y - 11 = 6y - 4y + 4

- 11 = 2y + 4

- 11 - 4 = 2y + 4 - 4

2y = - 15

2y ÷ 2 = - 15 ÷ 2

y = - 7.5

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Find a ⋅ b. a = 9i + 5j, b = 4i + 3j

amm1812

ANSWER

$a.b = 51$

EXPLANATION

The given vectors are:

$a = 9i + 5j$
and

$b = 4i + 3j$

To find the dot product of the two vectors, we multiply the corresponding components and add them.

$a.b = 9 \times 4 + 5 \times 3$

This implies that,

$a.b = 36+ 15$

$a.b = 51$

Therefore the dot product of the two vectors is 51.

7 0

3 years ago

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Inessa05 [86]

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