Answer:
8 dollar/hr
Step-by-step explanation:
she worked 2 1/2 hrs yesterday and 4 1/4 hrs today
2 1/2 + 4/14
2+4 is 6
and 1/2+1/4 multiply 2 to both numerator and denominator of 1/2 so that the denominator of both fraction is like
it will now become 2/4+1/4 which equals 3/4
This means that she worked total of 6 3/4 hour in all yesterday and today
she is paid 54 dollar
we will need to divide 6 3/4 or written as 6.75 by 54 to find how much she earns per hour
and that would be 8
so she earns 8 dollar per hour.
Answer:
1 : 4
Step-by-step explanation:
Let x represent the amount of 30% solution for 1 unit of 5% solution. Then the amount of acid in the mix is ...
0.30x + 0.05·1 = 0.10·(x +1)
0.30x + 0.05 = 0.10x + 0.10 . . . . eliminate parentheses
0.20x = 0.05 . . . . . . . . . . . . . . . . subtract 0.05+0.10x
x = 0.05/0.20 = 1/4
That is, the ratio x : 1 is 1 : 4.
The answer would be x=180-65 this is because vertically opposite angle to 65 would be 65 which means that x and 65 are supplementary.
8) D
9) D
11) Twenty-five thousandths
13) A
14) Sixty-eight and 4 tenths
Not sure on 10 and 12
