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3 years ago

Additional mathematics

Mathematics

1 answer:

insens350 [35]3 years ago

5 0

Answer:

I don't know what you want me to answer but this is the definition=Additional Mathematics is a qualification in mathematics, commonly taken by students in high-school (or GCSE exam takers in United Kingdom). It is applied to a range of problems set out in a different format and wider content to the standard Mathematics at the same level.

Step-by-step explanation:

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Part of performing routine computer maintenance includes

tigry1 [53]

Answer:

deleting Internet browsing history.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

The area of a rectangular piece of cardboard is represented by

Liula [17]

This question is solved applying the formula of the area of the rectangle, and finding it's width. To do this, we solve a quadratic equation, and we get that the cardboard has a width of 1.5 feet.

Area of a rectangle:

The area of rectangle of length l and width w is given by:

$A = wl$

w(2w + 3) = 9

From this, we get that:

$l = 2w + 3, A = 9$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

$\Delta = b^{2} - 4ac$

In this question:

$w(2w+3) = 9$

$2w^2 + 3w - 9 = 0$

Thus a quadratic equation with $a = 2, b = 3, c = -9$

Then

$\Delta = 3^2 - 4(2)(-9) = 81$

$w_{1} = \frac{-3 + \sqrt{81}}{2*2} = 1.5$

$w_{2} = \frac{-3 - \sqrt{81}}{2*2} = -3$

Width is a positive measure, thus, the width of the cardboard is of 1.5 feet.

Another similar problem can be found at brainly.com/question/16995958

5 0

3 years ago

When mrs. myles gave a test, the scores were normally distributed with a mean of 72 and a standard deviation of 8. this means th

irina [24]

The empirical rule states that in a normal distribution,
68% of data is within 1 std deviation of the mean
95% of data is within 2 std deviation of the mean
99.7% of data is within 3 std deviation of the mean

In this case 95% of the cases would be within two std deviations of the mean
mean - 8 and mean + 8
72 - 8 = 64 and 72 + 8 = 80

then 95% of the scores are between 64% and 80% on the test.

5 0

3 years ago

Jan saw 9 full moons in 52 daya

MrRissso [65]

Answer:

1 full moon per 6 days

I'm going to guess that is what you want.

3 0

3 years ago

I need help with this pleasee

Sauron [17]

Answer:

120

Step-by-step explanation:

The area of the room is 300 feet^2

The carpet has a side length of 2.5 feet so you divide 300 by 2.5

300/2.5 = 120

3 0

3 years ago