The expressions for the payment made to Mary are,
(Monday) 90 = 15m + b
(Tuesday) 62 = 8m + b
where m and b are the fee per student and the base fee, respectively. Solving for m and b, the values are 4 and 30.
The equation that represents Mary's earning is
y = 4x + 30
For 20 students,
y = 4(20) + 30 = 110
For Lisa's earnings,
y = 8x + 15
Substituting 20,
y =8(20) + 15 = 175
Thus, Lisa would earn more than Mary by $65.
Answer:
divide 11 by 6 and you get 1.83333333
Answer:126.8
Step-by-step explanation:
27+26.2=53.8
180-53.8=126.8
Not sure if this is right but 4x/8
" 1 / 4 " means " 1 divided by 4 ".
Do that division, and you get " 0.25 " .
To change any number to percent, multiply the number by 100 .
The easy way to do that is to move the decimal point 2 places that way ==> .
When you multiply 0.25 by 100, you find that it's <em>25%</em> .
