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3 years ago

Can someone help me understand why the mean travel for women is greater than the mean travel for men?

Mathematics

1 answer:

VashaNatasha [74]3 years ago

7 0

I don't understand your question? the table is comparing between average people ( men dark gray/ women light grey) and the time they take to get to their work...

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What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 ti

Marat540 [252]

Answer:

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

Step-by-step explanation:

Given

$x^2 - 5x - 7 = 0$

Required

Solve for x using:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

First, we need to identify a, b and c

The general form of a quadratic equation is:

$ax^2 + bx + c = 0$

So, by comparison with $x^2 - 5x - 7 = 0$

$a = 1$ $b = -5$ $c = -7$

Substitute these values of a, b and c in

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{-(-5) \± \sqrt{(-5)^2 - 4 * 1 * -7}}{2 * 1}$

$x = \frac{5 \± \sqrt{25 +28}}{2}$

$x = \frac{5 \± \sqrt{53}}{2}$

Split the expression to two

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

To solve further in decimal form, we have

$x = \frac{5 + 7.28}{2}$ or $x = \frac{5 - 7.28}{2}$

$x = \frac{12.28}{2}$ or $x = \frac{-2.28}{2}$

$x = 6.14$ or $x = -1.14$

4 0

3 years ago

Ich variable:<br> 12. 900 + C = 60 what does c =

Lemur [1.5K]

C = -840

Isolate C by subtracting 900 on both sides:
C = 60-900
Which then gives u C = -840

3 0

3 years ago

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Find(4) when f(x)=4x^2-3x+3

zimovet [89]

Assuming x = 4, replace each x in the equation with 4:

$4(4)^{2} - 3(4) + 3$

Solve each term in parentheses:

$4(4)^{2}$
$4^{2} = 16$
$4 \times 16 = 64$

$-3(4)$
$-3 \times 4 = -12$

Your equation should now look like this:

$64 - 12 + 3 = 55$

f(4) will equal 55.

3 0

3 years ago

This sequence represents the diameters of circles used to create an art project: 2.5 cm, 3.1 cm, 3.7 cm, 4.3 cm Let f(n) represe

vlabodo [156]

The diameters of the circles given are listed as: 2.5 cm, 3.1 cm, 3.7 cm, and 4.3 cm. It can be observed that there is a common difference between the terms of the progression such that the difference between the first two terms is 0.6 cm. The difference between the third and the second is also 0.6, and so on. Thus, the equation that will be able to represent the given is,
<em> f(n) = 2.5 + 0.6(n - 1)</em>

3 0

3 years ago

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Luke saves 10p coins and 20p coins he has 3 times as many 10p coins as 20p coins a total of 17 pounds how 10p coins does he have

Lena [83]

Answer:

10p coins does he have 102

Step-by-step explanation:

given data

saves= 10p coins and 20p coins

total = 17 pounds

to find out

how 10p coins does he have

solution

we consider here no of 20p coin = x

so equation will be here

3 × 10 x +20 x = 1700

30 x + 20 x = 1700

x = 34

so that

10p coins = 3 time × 34 = 102

20p coins = 34

so that 10p coins does he have 102

5 0

3 years ago

Read 2 more answers