Either a student passes an exam or fails it. that means the percentage of students who pass plus the percentage of students who fail must add to 100%. this also means that if 22% pass, then 78% fail. there are 68 students total and 78% fail so the number of students failing is:
(78/100)(68) = 53.04 which is approximately 53 students.
let me know if you have any questions!!!!
Let's solve this by substitution.
y is given by the 2nd eqn as y = (1/3)x + 7. Subst. (1/3)x + 7 into the first eqn as a replacement for y: x + 9( (1/3)x + 7) = 3.
clear out fractions by mult. all 3 terms by 3: 3x + 9x + 63 = 3
Combine like terms: 12x = -60. Then x = -5
Find y by subst. -5 for x in the 2nd equation: y = (1/3)(-5) + 7
= -5/3 + 35/3 = 30/3 = 10.
Thus, the solution (x,y) of this system is (-5,10).
Answer:
The cost of 16 ounce bottle would be .15 cents per ounce = $2.40
Step-by-step explanation:
2.40/16= .15
2.80/28= .10
Answer:
The value of H is 28.
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(H-6)/(-7-(-5))
m=(H-6)/(-7+5)
-11=(H-6)/-2
-11(-2)=H-6
22=H-6
H=22+6
H=28
