12.73 GB total when rounded to the nearest 100th.
3.5/27.5=y
y•100= 12.73
X=number of boys
y=number of girls.
We can suggest the following system of equations:
x+y=33
x/y=3/8
We solve this system of equations by substitution method.
x/y=3/8 ⇒x=3y/8
(3y/8)+y=33
least common multiple=8
3y+8y=33*8
11y=33*8
y=(33*8)/11
y=3*8
y=24
x+y=33
x+24=33
x=33-24
x=9
number of boys /total number of students=9/33=3/11
There are 9 boys and 24 girls in the class.
Answer: C: 9. since 3/11 of the students are boys.
P= 3
Q= -14
R= -5
Step-by-step explanation:
Just solve the equation on the right side, you'll get:
=3x^2 -15x +x -5
=3x^2 -14x -5
Now compare it to the equation on the left side,
The coefficient of x^2 on the left is "p", on the right that we just solved is 3.
Same for "q" which is the coefficient on the left, on the right it's -14.
And for "r" it's -5 from the equation on the right.
distance = rate * time.
distance is number of miles the car has traveled.
rate = number of miles per hour the car is traveling at.
time = number of hours the car has been driven.
let D = distance.
let T = time.
let R = rate
the general equation is D = R*T
as long as the car will always be driven at 55 miles per hour, you can substitute 55 for R and that becomes your constant.
The equation then becomes D = 55 * T.
example:
you drive 5 hours.
D = 55 * T = 55 * 5 = 275 miles.
If you drive at 55 miles per hour for 5 hours, you will have driven 275 miles.
Hope this helps!
