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3 years ago

(c) The shape ABCD is one face of a cuboid.

Mathematics

1 answer:

WITCHER [35]3 years ago

6 0

Answer:

150cm

Step-by-step explanation:

depth is 5 cm, so the area of one of the faces is 25 cm. theres 6 faces so 25*6= 150

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Is (–5, 0.5) a solution of this system? x – 4y = –7, 0.2x + 2y = 0 Substitute (–5, 0.5) into x – 4y = –7 to get . Substitute (–5

kaheart [24]

ANSWER:

(-5, 0.5) is the solution of given equation x – 4y = –7, 0.2x + 2y = 0.

SOLUTION:

Given, two equations are x – 4y = -7 → (1)

And 0.2x + 2y = 0 → (2)

We have to find whether (-5, 0.5) is a solution of given system or not.

For that, we have to solve the given two equations.

Before solving let us multiply equation (2) with 2 in order to get y terms cancelled. Such that, our process becomes easy.

Now equation (2) becomes

0.4x + 4y = 0 → ( 3 )

Now, add equation (1) and equation (3), we get

1.4x + 0 = -7

$x=\frac{-7}{1.4}=-5$

Now, substitute x value in (2)

0.2(-5) + 2y = 0

-1 + 2y = 0

2y = 1

y = 0.5

So, the solution for given equations is (-5, 0.5).

Hence (-5, 0.5) is the solution of given equations.

8 0

4 years ago

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