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Elan Coil [88]
2 years ago
6

Given that a = 1, b = 3 and c = 2 work out b² - 2ac

Mathematics
1 answer:
galina1969 [7]2 years ago
7 0

3^{2}-2*1*2

= 9-4

=5

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I have some homework questions that i am having problems finding. Please help!
Zanzabum
[1] There are two main values to science. The first is that mathematics is where we study numbers... and they appear everywhere in the world around us! We see whole numbers when we count, negative numbers when we are in debt (just look at the national debt!), fractions when we share things between people (think pizza, or chocolate bars, yum!), and decimals when we measure distances, lengths, areas, and sizes. In fact, numbers can be used to describe almost anything. Even color can be described as the amount of red, green, and blue light (the RGB system which is how computer screens work). 

The second value to science is the thinking and ideas of mathematics. Mathematics is where we learn the ideas of distance and sizes (such as area and volume). It teaches us to ask, "How far?" or "How big?" These ideas are applied to study geography, biology, astronomy and more. We also learn to look for patterns. In math, these patterns are usually number or geometric patterns, but science applies this idea to discover patterns in the weather, agriculture, oceans, and more.
7 0
3 years ago
Every dimension of a triangular pyramid is multiplied by 10 to produce a new figure that is geometrically similar. What effect d
Lesechka [4]
<h3>Answer: Choice C</h3>

The surface area of the pyramid is multiplied by 100.

======================================================

Explanation:

Consider a square that is 3 by 3. Its area is 3*3 = 9.

Then we'll multiply each dimension by 10 to get a 30 by 30 square. The new larger area is 30*30 = 900. The jump from the old area (9) to the new area (900) is "times 100". We can write 100 as 10^2, where the base of that exponential is the scale factor 10.

This idea can apply to any surface area and not just squares. This is why the surface area of the enlarged pyramid is 100 times that of the original pyramid.

new surface area = 100*(old surface area)

8 0
2 years ago
A right triangle has…?
bearhunter [10]
Answer: C and D

Explanation:

Is it A? No, because a right triangle does not have all three sides with equal length. Only in a equilateral triangle will have all three equal sides of equal length.

Is it B? No, because a triangle has ZERO parallel lines. Remember parallel lines are like this | | in a triangle the lines are like this /\

Is it C? Yes, because a triangle has two sides of equal length, meaning it has two congruent sides.

Is it D? Yes, a right triangle has two sides that create the 90 degrees making it a right triangle. Perpendicular means that theirs two lines creating the 90 degree and a triangle has two perpendicular sides.
3 0
3 years ago
What is the perimeter and area of this shape:
o-na [289]
Perimeter = 10.28
Area = 7.14
5 0
2 years ago
What is the solution to the system of equations below? y= -4/5 x + and y = –30
Naya [18.7K]

Answer:

x=37.5

Step-by-step explanation:

We need to find the solution to the following system of equations:

y = -\frac{4}{5} x and y=-30

By plugging the value of 'y' into the first equation we have that:

-30 = -\frac{4}{5} x ⇒ 30=\frac{4}{5} x

Solving for 'x' we have:

x=37.5

So, the solution to the system of equation is: (37.5, -30)

8 0
3 years ago
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