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Ksenya-84 [330]
3 years ago
8

Ricing & Sales Math Quiz

Mathematics
1 answer:
marta [7]3 years ago
8 0

Answer:

b) $52.33

Step-by-step explanation:

(For bid 3 I think you meant $55)

50+52+55 = 157

157/3 = 52.33(.33 repeating)

Which rounds to $52.33

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Sketch the situation if necessary and use related rates to solve. Two airplanes are flying in the air at the same height. Airpla
Alexeev081 [22]

Answer:

  -390 mph

Step-by-step explanation:

Let a and b represent, respectively, the distances of A and B from the airport. The distance d between the planes is then given by the Pythagorean theorem as ...

  d² = a² + b²

Differentiating with respect to time, we have ...

  2d·d' = 2a·a' +2b·b'

Solving for d', we get ...

  d' = (a/d)a' +(b/d)b'

The value of d at the time of interest is ...

  d = √(a² +b²) = √(30² +40²) = √2500 = 50

Then the rate of change of separation is ...

  d' = (30/50)(-250 mph) +(40/50)(-300 mph) = (-150 -240) mph

  d' = -390 mph

The distance between planes is decreasing at 390 miles per hour.

4 0
3 years ago
Solve this equation
marishachu [46]

Answer:

k=-11

Step-by-step explanation:

Rewrite the Equation.

\frac{k+3}{2} =-4

Multiply both sides of the Equation by 2.

2*\frac{k+3}{2}=2*-4

Simplify both sides of the Equation.

k+3=-8

Move all terms not containing k to the right side of the Equation.  

k=-11

5 0
2 years ago
Tapiwa raked 5% more leaves than Adam raked. Together, they raked 697 liters of leaves. How many liters of leaves did Adam rake?
EleoNora [17]
Assume that the number of leaves raked by Adam is x.
Tapiwa raked 5% more leaves than Adam, this means that:
Leaves raked by Tapiwa = x + 0.05x = 1.05x liters
We are given that the total number of raked leaves is 697 liters.
This means that:
Total raked = raked by Adam + raked by Tapiwa
697 = x + 1.05x
697 = 2.05x
x = 697 / 2.05 
x = 340
Based on the above calculations:
Adam raked 340 liters of leaves
Tapiwa raked 1.05(340) = 357 liters of leaves
7 0
3 years ago
the length of each side of a square is 3 in. more than the length of each side of a smaller square. the sum of the areas is 45 i
Marat540 [252]

Answer:

2025 is the answer

Step-by-step explanation:

3 0
2 years ago
Me need help its hard
KatRina [158]

Answer:

2. Cost of six books

3. Cost of one book

Step-by-step explanation:

I don't know about the rest though.

7 0
3 years ago
Read 2 more answers
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