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Korvikt [17]
2 years ago
9

Solve for d. 2d+3=7d+18

Mathematics
2 answers:
Vladimir [108]2 years ago
6 0
Answer: -3.

Explanation:
2(-3)+3=7(-3)+18
-6+3=-21+18
-3=-3
algol [13]2 years ago
5 0

Answer: d = -3

Step-by-step explanation:

2d+3=7d+18

-5d=15

d=-3

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Cerrena [4.2K]

Answer:

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3 years ago
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An aircraft factory manufactures airplane engines. The unit cost C (the cost in dollars to make each airplane engine) depends on
butalik [34]

Answer:

90 engines must be made to minimize the unit cost.

Step-by-step explanation:

Vertex of a quadratic function:

Suppose we have a quadratic function in the following format:

f(x) = ax^{2} + bx + c

It's vertex is the point (x_{v}, y_{v})

In which

x_{v} = -\frac{b}{2a}

y_{v} = -\frac{\Delta}{4a}

Where

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This means that a = 1, b = -180, c = 20482

How many engines must be made to minimize the unit cost?

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x_{v} = -\frac{b}{2a} = -\frac{-180}{2(1)} = 90

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3 0
3 years ago
400÷6= show how you get 66r6
Aleksandr [31]

Answer:

 0 6 6

   6 ⟌ 4 0 0

     - 0    

       4 0  

     - 3 6  

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     -   3 6

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Step-by-step explanation:

8 0
3 years ago
Need Help ASAP!!
egoroff_w [7]
Bxh

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3 years ago
The Smith family was one of the first to come to the U.S. They had 8 children. Assuming that the probability of a child being a
OLEGan [10]

Answer: Hello some part of your question is missing below is the missing part

Missing question:  Find the probability that the Smith family had at least 6 girls?

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Step-by-step explanation:

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P( boy ) ( q ) = 1 - 0.5 = 0.5

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( using Binomial probability Calculator )

8 0
3 years ago
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