Answer:
Answer: 8.00 for a bag of popcorn, drink: 4:00.
Step-by-step explanation:
Set up a system of equations, solve 6d+7b=80
2d+6b=56. Solve for b and d.
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Either I've made a miscalculation... or none of these are correct...
1.7 in it's simplest form is 17/10.
So... neither A, B, C, or D is correct.
Answer:
-4x - 3 = -8
Step-by-step explanation:
On our left, we have -x in 4 places = 4(-x) = -4x
And on the left, we also have -1 in 3 places = 3(-1) = -3
Altogether in our left, we have: -4x +(-3)
That is: -4x - 3
On our right, we have -1 in 8 places, which is 8(-1) = -8
Therefore, the equation that represents the model would be:
-4x - 3 = -8
Answer:
90
Step-by-step explanation:
If z varies inversely as w^2 then:
z=k/(w^2)
z=10 when w=6:
10=k/36---> k=360
z=k/2^2
z=360/4=90
Answer:
<h2>
70cm/s</h2>
Step-by-step explanation:
Area of a square with side of length L is expressed as A = L². The rate at which the area is increasing will be expressed as dA/dt.
dA/dt = dA/dL * dL/dt where
dL/dt is the rate at which each side of the square is increasing.
Since dA/dL = 2L, dA/dt = 2L dL/dt
Given dL/dt = 5cm/s and the Area of the square = 49 cm²
49 = L²
L = √49
L = 7cm
dA/dt = 2(7) * 5
dA/dt = 14*5
dA/dt = 70cm/s
The rate at which the area of the square is increasing is 70cm/s
