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Lady_Fox [76]
3 years ago
5

1. 8 - n = -4

Mathematics
1 answer:
iogann1982 [59]3 years ago
4 0

Answer:

1.-n=-12; n=12

2.18=-2x; x=-9

3.-n=-12; n=12

4.b=3


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The point (2, -1) is on the line 2x + y = 5.
malfutka [58]

Answer:

No

Step-by-step explanation:

Substitute by x = 2 and y = - 1

You will get 2*2 + (-1) = 3 not 5

Then it doesn't lie

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Find the greatest common factor of 30 and 105 a. 3 b. 15 c. 30 d. 5
Korvikt [17]

Answer:

Greatest common factor is 15.

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10. The answer isn't letter B. b2-4ac=7
kupik [55]

Answer:

A. b2 – 4ac = –12

Step-by-step explanation:

discriminant must be minus cause the graph doesn't cross the x-axis .in other words it doesn't have an answer.plus , the "a" of the equation is minus too.

Answer:

A)

Step-by-step explanation:

1) To answer this question, we must remember what this discriminant stands for:

2) We must plug in this discriminant, in the square root of Quadratic  Formula, to find its roots, i.e.:

The discriminant is a radicand.

3) The graph above shows us no Real roots for this equation then we have roots ∈ Complex Numbers, in other words:

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3 0
2 years ago
Look at the triangular prism. Work out the volume of the prism.
xz_007 [3.2K]

Answer:

See explanation

Step-by-step explanation:

The question has missing details, as the diagram of the prism is not shown.

However, I'll solve using a general rule.

The volume of a triangular prism is:

Volume = \frac{1}{2}* b * h * l

Where

b = base

h = height

l = length

Take for instance:

b = 20cm

h = 10cm

l = 5cm

The volume is:

Volume = \frac{1}{2} * 20cm * 10cm * 5cm

Volume = 10cm * 10cm * 5cm

Volume = 500cm^3

Another instance (see attachment).

From the attachment:

b = 4.5cm

h = 5cm

l = 8cm

The volume is:

Volume = \frac{1}{2} * 4.5cm * 5cm * 8cm

Volume = 2.25cm * 5cm * 8cm

Volume = 90cm^3

7 0
2 years ago
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