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iren [92.7K]
3 years ago
5

Please help its urgent due in an hour

Mathematics
1 answer:
finlep [7]3 years ago
5 0

Answer:

use geogebra app you can install it on your pc if you don't know how to use it search it on yt

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Sally travels to work each day. she travels 12 km east from home to main road. sally then travels 9 km north on the main road to
marshall27 [118]
This way Sally travels 12+9=21 kilometers.
If there was a direct way she could go to work, that way would have been 15 km (because her way to work forms a right-angled triangle).
Therefore her journey would be 21-15=6 km shorter. Choice A.
7 0
4 years ago
Select the two values of x that are roots of this equation.<br>x + 2x - 6 = 0​
VLD [36.1K]

For this case we must solve the following quadratic equation:

x ^ 2 + 2x-6 = 0

Where:

a = 1\\b = 2\\c = -6

The solution is given by:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}

Substituting:

x = \frac {-2 \pm \sqrt {2 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-2 \pm \sqrt {4 + 24}} {2}\\x = \frac {-2 \pm \sqrt {28}} {2}\\x = \frac {-2 \pm \sqrt {2 ^ 2 * 7}} {2}\\x = \frac {-2 \pm2 \sqrt {7}} {2}\\x = -1 \pm \sqrt {7}

Thus, we have two roots:

x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}

ANswer:

x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}

8 0
3 years ago
Make v the subject formulae
Monica [59]
1/u = 1/f -1/v
1/v = 1/u + 1/f
6 0
3 years ago
Read 2 more answers
Every year Ethan earns $38428each year he spends $ 21728 on exspenses how much she he have left over
astraxan [27]

Answer:

$16,700

Step-by-step explanation:

Subtract: 38428

               <u>-21728</u>

                16700

You will need to add 10 to the hundred's place by subtracting 1 from the thousandth's place: 37,4(+10)28.  Then you subtract as usual.

8 0
3 years ago
it costs $4.65 for a chicken sandwich, $1.85 for milk and 45c for a lollipop in a cafe. How ,uch change from $15 will i get if i
FinnZ [79.3K]
$1.10 will be your change!
5 0
3 years ago
Read 2 more answers
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