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Lera25 [3.4K]
3 years ago
10

Solve for x. write both solutions. separated by a comma 7x^2+8x+1=0

Mathematics
2 answers:
oksano4ka [1.4K]3 years ago
8 0

Answer:

look at the pic

Step-by-step explanation:

Simple trinomal

Glad to help!!!

eduard3 years ago
3 0

Answer:

x = 1/7, -1

Step-by-step explanation:

Solving by using the quadratic formula

7x^2 + 8x + 1 = 0

a = 7, b = 8, c = 1

x = (-b ± √b^2-4ac)/2a

x = (-8  ± √8^2-4·7·1)/2·7

x = (-8 ± √64-28)/14

x = (-8 ± √36)/14

x = (-8 ± 6)/14

If added:

x = (-2)/14

x = 1/7

If subtracted:

x = (-14)/14

x = -1

So the answers are x = 1/7 or x = -1

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A toy company has determined that the revenue generated by a particular toy is modeled by the following equation:
Artemon [7]
R(x) = 11x - 0.025x^2
Revenue is maximum when dr(x)/dx = 0
dr(x)/dx = 11 - 0.05x = 0
0.05x = 11
x = 11/0.05 = 220
The revenue will be maximum when 220000 toys are produced.

r(220) = 11(220) - 0.025(220)^2 = 2,420 - 1,210 = 1,210
Therefore, maximum revenue = $1210000
8 0
3 years ago
Please help due in 15 minutes!!!!!
gizmo_the_mogwai [7]

Answer:

44ft

Step-by-step explanation:

The formula for circumference is 2 * π * radius and in this case we want to use 3.14 for π and so we do 2 x 3.14 x 7 because the radius is half of the diameter (14) and once you do that you end up getting 43.96 and once you round you get 44ft so you are correct.

4 0
3 years ago
Carl ran 27 miles last week. This is 3 times farther than Anna ran. Which equation can be used to find how many miles Anna ran?
nikklg [1K]
27×3=81 pope this helps!!!!!!: )
8 0
3 years ago
Read 2 more answers
A particular electronic component is produced at two plants for an electronics manufacturer. Plant A produces 70% of the compone
Vesna [10]

Answer:

If a component received by the manufacturer is defective, the probability that it was produced at plant A is 0.5385 = 53.85%.

Step-by-step explanation:

We use the Bayes Theorem to solve this question.

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Defective component

Event B: Produced at plant A.

Plant A produces 70% of the components used

This means that P(B) = 0.7

Among the components produced at plant A, the proportion of defective components is 1%.

This means that P(A|B) = 0.01

Probability of a defective component:

1% of 70%(defective at plant A)

2% of 100 - 70 = 30%(defective at plant B). So

P(A) = 0.01*0.7 + 0.02*0.3 = 0.013

If a component received by the manufacturer is defective, the probability that it was produced at plant A is

P(B|A) = \frac{0.7*0.01}{0.013} = 0.5385

If a component received by the manufacturer is defective, the probability that it was produced at plant A is 0.5385 = 53.85%.

4 0
3 years ago
What is the GPA for 88.69% 87.15% 75.35% 67.78% 63.14% 51.44%?<br> i just want to know.
lorasvet [3.4K]

The GPA for the following on the scale of 4 GPA are; 88.69% -3.3, 87.15% - 3.3, 75.35% - 2.0 , 67.78% - 1.3, 63.14% - 1.0, 51.44% - 0.0

<h3>What is GPA?</h3>

The Term GPA is a combined GPA or grade point average of all grades you have earned in a semester or term.

The Cumulative GPA is the overall GPA or grade point average of all cumulative GPA's that are earned in all semesters and all the courses in an academic term.

The GPA is total of averaged per semester; while the cumulative GPA is the total of all grades for all semesters That is; the difference between GPA and cumulative GPA.

The GPA for the following on the scale of 4 GPA are;

88.69% -3.3

87.15% - 3.3

75.35% - 2.0

67.78% - 1.3

63.14% - 1.0

51.44% - 0.0

Learn more about the GPA here;

brainly.com/question/1238928

#SPJ1

7 0
2 years ago
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