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Ivenika [448]
3 years ago
11

When x is 3, y is 15. If y varies directly as x, which equation relates x and y?

Mathematics
1 answer:
NARA [144]3 years ago
4 0

Answer:

x5=y

Step-by-step explanation:

Let's say 3y=15

3 x 5 = 15, so y=5.

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2 years ago
An object is 3.6 m from the pinhole. Its image is 4.2 cm from the opposite side of the pinhole. The height of the image is 0.8 c
madreJ [45]

Answer:

Height of the object is 68.6 cm.

Step-by-step explanation:

The height of the object can be determined by:

\frac{object distance from pinhole}{image distance from pinhole} = \frac{object height}{image height}

From the given question;

object distance from pinhole = 3.6 m = 360 cm

image distance from pinhole = 4.2 cm

height of image = 0.8 cm

So that;

\frac{360}{4.2} = \frac{object height}{0.8}

⇒ object height = \frac{360*0.8}{4.2}

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                           = 68.571

object height = 68.6 cm

Thus, the height of the object is 68.6 cm.

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3 years ago
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