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3 years ago

Please help !!

Mathematics

2 answers:

xxMikexx [17]3 years ago

5 0

I hope this helps you

Lady_Fox [76]3 years ago

4 0

#1)h^2+4h
#2)k^2-9k
#3)9a^2+9
#4)6p^2-48
#5)-6c^2-15
#6)-8g^2-28
#7)x^2-x^+3x
#8)15m^4-5m^2-35
#9)-3n^2+6n-24
#10)-12x^2+24x-36

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Solving x+ 8 = –3 gives: (i) x = 11 (ii) x = 12 (iii) x = –11 (iv) x = –12

olchik [2.2K]

Answer:

x+8=-3 gives

x=-11 is the required value

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3 years ago

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The cost of 2.25

jasenka [17]

Answer:

Hope this helps! <3

Step-by-step explanation:

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3 years ago

A rectangle has an area of 4 square centimeters. A second rectangle is 3 times as long and 3 times as wide as the first rectangl

vekshin1

Answer:

The area of the second rectangle will be 36 square centimetres

Step-by-step explanation:

Given:

Area of the first rectangle = 4 square centimetres

A second rectangle is 3 times as long and 3 times as wide as the first rectangle

To Find:

Area of the second rectangle = ?

Solution:

We know that area of the rectangle is Length X breadth

Length X width = 4

In this case the are 2 possibilities

Case 1:

Length = 2 cm

Width = 2 cm

2 X 2 = 4

Now According to the question

Length is 3 times = 2 X 3 = 6cm

width is also 3 times = 2 X 3 = 6 cm

Now the area of the second rectangle will be

6 X 6 = 36 square centimetres

Case 2:

Length = 4 cm

Width = 1 cm

4 X 1 = 4

Now According to the question

Length is 3 times = 4 X 3 = 12 cm

width is also 3 times = 1 X 3 =3 cm

Now the area of the second rectangle will be

12 X 3 = 36 square centimetres

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3 years ago

Imagine a world in which only decimals, not fractions, are used. How would your life be different?

nataly862011 [7]

I used to hate fractions. But in time, you learn to love them. This is because there's a big difference between fractions and decimals, even though when you divide the actual fraction it comes out to a decimal. Decimals go on and on sometimes, and it would be impossible to write out all those numbers, especially when taking a timed test, for example. Fractions, in this case, would be much more useful (as long as you know how to use them to your advantage). Fractions are basically all those decimal numbers wrapped up into a single, simple division. It makes the outcome of your answer much more accurate than if you estimate every decimal you get throughout a math problem. The more you estimate throughout the problem-solving process, the less accurate your final answer will be. Hence why teachers will usually tell you to estimate when you're putting down the final answer. Fractions are complex at times, so it may be easier to use them in decimal form for certain situations (especially if the decimal form is short and sweet). A world without fractions will result in many, many inaccurate situations involving mathematical knowledge.

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3 years ago

If a quadratic equation with real coefficients has a discriminant of 3 then the two roots must be

lukranit [14]

In a quadratic equation

q(x) = ax^2 + bx + c

The discriminant is = b^2 - 4ac

We have that discriminant = 3

If b^2 - 4ac > 0, then the roots are real.

If b^2 - 4ac < 0 then the roots are imaginary

In this problem b^2 - 4ac > 0 3 > 0

then the two roots must be real

6 0

3 years ago