If the ratio of boys to girls in a class is 8:5 you will not be able to tell how many students are in the class because there could be 8 boys and 5 girls in the class or there could be 16 boys and 10 girls.
Answer:
n=9
Step-by-step explanation:
7n+5=68 Subtract 5 on both sides.
<u>-5 -5</u>
7n=63 Divide both sides by 7.
<u>/7 /7</u>
n=9
Hope this helps! Have a nice day ^^
Answer:
160x 5 be a good time to cover the floor of a room stream NY and phone me
We were told that the distance 
is directly proportional to the time 
.
We write this mathematically as,
We can now introduce our constant of variation and write the equation for the direct equation as;
where 
is the constant of variation or constant of proportionality.
We substitute 
and 
, in to the equation of variation to obtain the constant of proportionality.
That is;
This implies that,
This simplifies to give us,
Now our equation of proportion becomes,
When T=20
Writing this as a mixed number we obtain,
This can also be rewritten as
correct to one decimal places.
Therefore the care covers 
miles in 
minutes.
Step-by-step explanation:
(12)(2) = 24 Find 2 numbers whose product is 24 and whose sum is 11 (8 and 3 work)
Rewrite 11x as 8x+3x and factor by grouping:
12x2 + 8x + 3x + 2 = 0
4x(3x+2) + 1(3x+2) = 0
(3x+2)(4x+1) = 0
x = -2/3 or x = -1/4
