If 3x-1=11,what is the value of x^2+x

Answers

Answer 1
Answer: We can set the 2nd equation to y that way we have something to solve for
\left \{ {{3x-1=11} \atop {x^2+x=y}} \right.
First we solve our first equation by moving the one to the other side
3x=12
Then we divide by 3 on each side
x=4
So now we can plug 4 into the x's of the 2nd equation
4^2+4=y\n 16+4=y\n 20=y

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Which is bigger: 3/8 or 0.38. Can you tell me how to work it out?please!
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A train leaves the station with a 7/8 load of coal. The train drops off 2/16 and 3/12. What is left in the train?

Answers

Answer:

4/8 is left on the train

Step-by-step explanation:

Hope this helps :D brainliest?

Which of the following is not a rigid motion transformation?

Answers

The one which is not a rigid motion transformation is D. Stretch.

What is Geometric Transformation?

Transformation of geometrical figures or points is the manipulation of a given figure to some other way.

Different types of transformations are Rotation, Reflection, Glide reflection, Translation and Dilation.

Rigid motion transformation is the transformation which is formed when a point or a shape is transformed such that the size or the shape of the original object does not change.

In rotation, translation and reflection, there is no change in the size or the shape.

But in dilation, the size becomes smaller or larger based on it is enlargement or stretch.

So stretch is not a rigid motion transformation.

Hence option D is the correct answer.

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Answer:

D. Stretch

Step-by-step explanation:

All the others keep the same dimensions

What's bigger 25,000
years or 0.1 million years

Answers

0.1 million years is equal to 100,000 years.
25,000 is smaller than 100,000 years.
0.1 million years its bigger then 25,000 years

Has anybody done this problem before on Carnegie learning Mathia I’ve been stuck on this problem and I need to turn in this assignment

Answers

Answer:

Conclusion: ◇WAU ≅ ◇JAU

Reason: ASA theorem

Step-by-step explanation:

A personal trainer designs exercise plans based on a combination of strength-training and aerobic exercise. A beginner plan has 15 minutes per session of strength-training and 20 minutes per session of aerobic exercise for a total of 90 minutes of exercise in a week. An advanced plan has 20 minutes per session of strength-training and 30 minutes of aerobic exercise for a total of 130 minutes of exercise in a week.Which statement describes when the plans are based on the same number of aerobic exercise sessions?

Each plan utilizes a combination of 2 strength-training sessions and 2 aerobic exercise sessions per week.
Each plan utilizes a combination of 2 strength-training sessions and 3 aerobic exercise sessions per week.
Each plan utilizes a combination of 3 strength-training sessions and 2 aerobic exercise sessions per week.
Each plan utilizes a combination of 3 strength-training sessions and 3 aerobic exercise sessions per week.

Answers

Let y be the number of strength-training exercises per week.
Let x be the number of aerobic exercises per week.
For the beginner plan:
15y + 20x = 90 ..........(1)
For the advanced plan:
20y + 30x = 130 ........(2)
Multiply both sides of (1) by 3 to get:
45y + 60x = 270 ........(3)
Multiply both sides of (2) by2 to get:
40y + 60x = 260 .......(4)
Subtracting (4) from (3) we get:
5y = 10
y = 2
Plugging in the value of 2 for y in equation and solving, we find x = 3.
Therefore the correct statement is:
"Each plan utilizes a combination of 2 strength-training sessions and 3 aerobic exercise sessions per week." 


Each plan utilizes a combination of 2 strength-training sessions and 3 aerobic exercise sessions per week.

How to Solve Algebra Word Problems?

Let y be the number of strength-training exercises per week.

Let x be the number of aerobic exercises per week.

For the beginner plan, the equation would be gotten as;

15y + 20x = 90  ------(eq 1)

The equation to represent the advanced plan would be;

20y + 30x = 130   -------(eq 2)

Multiply both sides of eq 1 by 4 to get:

60y + 80x = 360 ------(eq 3)

Multiply both sides of eq 2 by 3 to get:

60y + 90x = 390   ------(eq 4)

Subtract  eq(3) from eq(4) we get:

10x = 30

Thus; x = 3

Then; 15y + 20(3) = 90

15y = 30

y = 2

Thus, the correct statement is:

"Each plan utilizes a combination of 2 strength-training sessions and 3 aerobic exercise sessions per week."

Read more about Algebra Word Problems at; brainly.com/question/4344214

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When you complete a job, but use more time and effort than is truly necessary, how have you worked?a. Effectively, but not efficiently
b. Neither effectively nor efficiently
c. Efficiently, but not effectively
d. Both effectively and efficiently

Answers

a. effectively, but not efficiently
You completed the job, which means it was effective, however since it took so much time and effort, it could have possibly been done more efficiently.