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Paha777 [63]
3 years ago
15

Y varies directly with x. If y=25 when x=5, find y when x =-4y =​

Mathematics
1 answer:
alina1380 [7]3 years ago
7 0

Answer:

y = -20

Step-by-step explanation:

Given that y varies directly with x it means changing x will also cause change in y

Mathematically it can be written as:

y∝x

Removing the proportionality symbol

y = kx

Given y=25 when x=5 Putting the values

25 = k(5)\\k = \frac{25}{5}\\k = 5

Now

y = 5x

We have to find the value of y when x = -4

Putting x=-4

y = 5(-4)\\y = -20

Hence,,

y = -20

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Answer:

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3 years ago
2. Help ASAP!!!!!!!!!!!!!!!!
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ANSWER

2 \times 2

EXPLANATION

The dimensions of a matrix is of the form:

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Since the inner products are the same,the outer products give the dimensions of the product of the two matrices.

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Therefore the dimensions of the product is a 2×2 matrix.

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