Answer:
13 glue sticks cost $25.22.
Step-by-step explanation:
4 blue sticks cost $7.76, this means that one glue stick costs
$7.76/4 = $1.94.
Let be the cost of the glue sticks, and
be the number of glue sticks; then
We can use this equation to find the cost of 13 glue sticks; we just put into our equation and it gives:
So 13 glue sticks cost $25.22.
Answer:
27°,63°
Step-by-step explanation:
Let the two angles be a and b.
They are complementary, meaning they add up to 90. Thus:
And we are told their difference is 36. Therefore:
Solve for the system of equations. Add b to both sides in the second equation:
Substitute this into the first:
Combine like terms;
Subtract 36:
Divide by 2:
So, b is 27 degrees.
Use the second equation again:
Now that we know b is 27, substitute:
Add 27 to both sides:
So, a is 63 degrees.
And we're done :)