Hello! :)
The <u>answer</u> is x+15!
~Hope it helps!~ :)
Answer:
c .3.3
Step-by-step explanation:
pH is the negative log of the molar hydrogen ion concentration.The equation to calculate pH is;
pH = -log10[H+]
pH = -log10(5.0 x 10-4)
pH = 3.30
Answer:
Step-by-step explanation:
So we have the equation:
First, subtract 9 from both sides:
Divide both sides by -4:
Definition of Absolute Value:
Subtract 3 from both sides:
Divide both sides by 5:
And we're done!
So we solve for each
70% of 100=70
students who didn't buy lunch=100-70=30
some of the 70 left so that the students who bought lunch, are 60% of those who are left
we know that the students who didn't buy lunch didn't change number so therefor
100% of students left-60%=40%= students that didn't buy lunch=30 so
40%=30
20%=15
100%=75
there were 75 students lfet in the cafeteria
2x² - 5 + x is a trinomial with a constant term -5.
Hope this helps.
