The cost of 85 shirts is 400+7.5*85=1037.5
The average per shirt is 1037.5/85=12.206
Answer:
No
Step-by-step explanation:
If we use the Pythagorean theorem, we can find if it is a right triangle. To do that, set up an equation.

If the triangle is a right triangle, c would equal 11
Solve.

Then find the square root of 100.
The square root of 100 is 10, not 11.
So this is not a right triangle.
I hope this helps!
Do 180 and subtract 171 so 9
Answer:
Cant see the top of the diagram
Step-by-step explanation:
But the wavelength is the how close ur waves are.
<u>Answer:</u>
<h2>2 and 5</h2>
<u>Steps:</u>
a. xy = 10
b. x+y = 7
x+y = 7
y = 7 - x
xy = 10
x(7 - x) = 10 (substitution of y)
7x - x² = 10
-x² + 7x - 10 = 0
here we have a quadratic equation that we will solve by using the quadratic formula
a = -1 | b = 7 | c = -10
x = (-7±√((-7)²-4×(-1)×(-10)))/2×(-1)
x = (-7±√(49-40))/-2
x = (-7±√9)/-2
x = (-7±3)/-2
x = -4/-2 , -10/-2
x = 2 , 5
<u>check:</u>
2×5 = 10
2+5 = 7