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Nataly_w [17]
3 years ago
15

Danielle’s text messaging plan costs 7$ for the first 700 messages and 30 cents for each additional text message. If she owes 18

.40$ for text messaging in the month of October, how many text messages did she send that month?
Mathematics
1 answer:
Artemon [7]3 years ago
7 0

Answer:

738 messages

Step-by-step explanation:

Use the given information to set up an equation. 7 is constant and 0.3 per message, with a total of 18.40.

0.3x + 7 = 18.4

Now solve for x

0.3x = 11.4

x = 38

She sent 38 messages over the standard 700, meaning she sent a total of 738 messages in the month of October

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An aircraft factory manufactures airplane engines. The unit cost (the cost in dollars to make each airplane engine) depends on t
Juliette [100K]

Answer:

Minimum unit cost = 5,858

Step-by-step explanation:

Given the function : C(x)=x^2−520x+73458

To find the minimum unit cost :

Take the derivative of C(x) with respect to x

dC/dx = 2x - 520

Set = 0

2x - 520

2x = 520

x = 260

To minimize unit cost, 260 engines must be produced

Hence, minimum unit cost will be :

C(x)=x^2−520x+73458

Put x = 260

C(260) = 260^2−520(260) + 73458

= 5,858

7 0
3 years ago
Solve. 7/9 = b/b - 10
kifflom [539]

Answer:

No Solution

Step-by-step explanation:

There are no values of  b

that make the equation true.

No solution

8 0
3 years ago
There are 75 milligrams of cholesterol in a 3.5 ounce serving of lobster. How much cholesterol is in 6ounces of lobster
Maru [420]

Hence, the amount of cholesterol in 6 ounces of lobster will be 128.58 milligrams

Step-by-step explanation:

Given

Cholesterol in 3.5 ounces = 75 mg

Cholesterol in 6 ounces =x= ?

This can be worked out by using proportions

It can be written as:

\frac{75}{3.5}=\frac{x}{6}\\21.43=\frac{x}{6}\\Multiplying\ both\ sides\ by\ 6\\21.43*6=x\\x=128.58\ mg

Hence, the amount of cholesterol in 6 ounces of lobster will be 128.58 milligrams

Keywords: Proportions, Conversion

Learn more about proportions at:

  • brainly.com/question/4163549
  • brainly.com/question/4168505

#LearnwithBrainly

8 0
3 years ago
Pls, it’s for a test , ;< . I Wanna actually Get a good grade. PLS HELP you will get 20 points
kow [346]
Answer: B. y=9
Explanation: divide both sides of the equation by three
y3/3 = y
27/3=9
y=9
hope this helps:)
7 0
3 years ago
Read 2 more answers
What percent of 88 is 132
Anit [1.1K]
\begin{array}{ccc}88&-&100\%\\132&-&p\%\end{array}\ \ \ \ |cross\ multiply\\\\\\88p=100\cdot132\ \ \ \ |divide\ both\ sides\ by\ 88\\\\p=\frac{13200}{88}\\\\\boxed{\boxed{p=150\ (\%)}}\leftarrow answer
8 0
3 years ago
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