If Taryn mowed 9 lawns in 7.5 hours and earned $112.50, then her hourly rate is:
$112.50 / 7.5 hrs = $15 per hour
If Alistair mowed 7 lawns in 5 hrs and earned $122.50, then her hourly rate is:
$122.50 / 5 hrs = $24.50 per hour
To earn an additional $735 each, they should work the following hours.
Taryn: $735 / $15 = 49 hours
Alistain: $735 / $24.50 = 30 hours
Answer:
h=-7
Step-by-step explanation:
-4(-6h - 7) = 9h + 10h - 7
24h+28=19h-7
Both side -28
24h+28-28=19h-7-29
24h=19h-35
Both side -19h
24h-19h=19h-19h-35
5h=-35
h=-7
M=64
Add 6 to both sides to get m=64
Answer:
Step-by-step explanation:
<u>Complex Numbers</u>
The complex numbers are known by having an 'imaginary' part along with the real part. They can be expressed like a + bi, where
Or, equivalently:
Let's find the result of the following products. On each one of them, there is a sum of a binomial multiplied by the subtraction of a binomial with the very same terms. It leads to a well-known polynomial identity:
1.
Applying the above-mentioned identity:
Since
2.
Proceed in the same way as before:
3.