Solve and find the integer of 4x^2-19x-5
1 answer:
(x-5)(4x+1)
4x^2 times -5 is -20 the factors of -20 are -1x20, 1x-20... but to make the -19x you would add together the 1 and -20 because 1-20 is -19.
This then splits off to factorise 4x^2-20x, making this side 4x(1x-5) carry the brackets over to make it 1(1x-5) joining the brackets together to make (4x+1)(x-5)
4x^2 times -5 is -20 the factors of -20 are -1x20, 1x-20... but to make the -19x you would add together the 1 and -20 because 1-20 is -19.
This then splits off to factorise 4x^2-20x, making this side 4x(1x-5) carry the brackets over to make it 1(1x-5) joining the brackets together to make (4x+1)(x-5)
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<h3>The total money earned by Rita on Monday = $158</h3>
Step-by-step explanation:
The rate by which Rita is paid first 8 hours = $16
The next per hour rate after 8 hours = times the usual rate.
Now, 1.5 times $16 = 1.5 x 1 6 = $24
So, for each hour worked after 8th hour, Rita is paid $24 per hour.
Now, the intervals she has worked are:
(a) from 8:15 to 12: 45 pm
So, the number of hours worked = 45 minutes + 45 minutes + 3 hours
= 4 hours 30 minutes .... (1) (as 60 minutes = 1 hour)
(b) break of 45 minutes after 12: 45 = 12: 45 + 45 minutes
= 12 hour 90 minutes = 1 : 30 P M
So, she started working at 1: 30 and worked till 6: 15
So, the number of hours worked = 30 minutes + 15 minutes +4 hours
= 4 hours 45 minutes .... (2)
So, by adding (1) and (2) the total hours worked by Rita
= 4 hours 30 minutes + 4 hours 45 minutes
= 8 hours 75 minutes = 9 hours 15 minutes
9 hours 15 minutes = ( 8 + 1 .25 ) ( 15 minutes = 0.25 of an hour)
So, the payment is ( 8 x (16) + 1.25 (24) )
= 128 + 30 = 158
Hence, the total money earned by Rita = $158