answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NeX [460]
1 year ago
4

Is (–5, 0.5) a solution of this system? x – 4y = –7, 0.2x + 2y = 0 Substitute (–5, 0.5) into x – 4y = –7 to get . Substitute (–5

, 0.5) into 0.2x + 2y = 0 to get . Simplify the above equations to get
Mathematics
2 answers:
aivan3 [116]1 year ago
8 0

Answer:

Substitute (–5, 0.5) into x – 4y = –7 to get  

✔ –5 – 4(0.5) = –7

.

Substitute (–5, 0.5) into 0.2x + 2y = 0 to get  

✔ 0.2(–5) + 2(0.5) = 0

.

Simplify the above equations to get  

✔ –7 = –7 is true and 0 = 0 is true; a solution.

Step-by-step explanation:

<h2>PLEASE MARK BRAINLIEST!!!!!!!!!!!</h2>
spayn [35]1 year ago
5 0

Answer:

somebody please give me the answer

Step-by-step explanation:

You might be interested in
While driving home for the holidays, you can’t seem to get Little’s Law out of your mind. You note that your average speed of tr
suter [353]

Answer:

1,200 cars per hour

Step-by-step explanation:

Let's suppose the car flow is constant and based on the observations stated in the problem.

If we set and imaginary car counter where your car is, then there are 25 cars in ¼ of a mile (including yours) going at your same speed.

Now compute how long it will take to travel ¼ mile. As your speed is constant 60 mph, we can cross multiply  

60 miles -----------> 1 hour

¼ of a mile --------> x hours

and

60/ (¼) = 1/x ---------> x = 1/240 hours.

This means that in 1/240 hours the 25 cars will be passing the counter.

Now compute how many cars will pass through our counter in 1 hour. Again, cross multiplying

1/240 hours -------> 25 cars

1 hour --------------> x cars

and

1/240 = 25/x -------> x = 25*240 = 1,200 cars.

So, the flow rate of the highway (going in your direction) in cars per hour is 1,200 cars per hour.

7 0
2 years ago
Explain why the graphing calculator cannot be used to solve or approximate solutions to all polynomial equations.
Lelu [443]
Let's put it this way:  If you plot a few non-x-intercept points and then draw a curvy line through them,you will not know if you got the x-intercepts even close to being correct. <span>The only way you can be sure of your x-intercepts is to set the quadratic equal to zero and solve. So its a matter of guessing from the pictures. Basicaly said, the calculator won't give you the exact result.</span>
4 0
2 years ago
Read 2 more answers
A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the ave
OLga [1]

Answer:

Option D. statistical inference        

Step-by-step explanation:

We are given the following situation in the question:

"A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 21 years."

This is a n example of statistical Inference.

  • Statistical inference is the procedure of making inference or estimating parameters of a population with the help of test statistics.
  • In the given situation the university students are the population and the students of a particular class are sample.
  • The professor with the help of sample statistic (mean age of students in class) approximated the mean age of students in the university.
5 0
2 years ago
Total employment for sheet metal workers in 2016 is projected to be 201,000. if this is a 6.3% increase from 2006, approximately
fomenos

Answer:

Option d.

Step-by-step explanation:

Total employment for sheet metal workers in 2016 is projected to be = 201,000

This is a 6.3% increase from 2006.

Let the number of workers in 2006 be n

n + (6.3% of n) = 201,000

n + ( 0.063n) = 201,000

1.063n = 201,000

n = \frac{201,000}{1.063}

n = 189,087. 4882 ≈ 189,000

the total employment in 2006 was approximately 189,000

Option d is the answer.

8 0
2 years ago
It took Amir 2 hours to hike 5 miles. On the first part of the hike, Amir averaged 3 miles per hour. For the second part of the
rjkz [21]
<h2>Answer:</h2>

The equation that will be used to find t is:

                3(2-t)+1.5t=5

<h2>Step-by-step explanation:</h2>

Total distance that is traveled by Amir is: 5 miles.

and the total time taken by him is: 2 hours.

On the first part of the hike, Amir averaged 3 miles per hour.

Let t denote the time he spent hiking during the second i.e. difficult part of the hike.

  • Hence, the time he spent in first part of hike is: 2-t

( Since, the total time was 2 hours)

Also, we know that:

Distance=Speed\times Time

Hence, distance traveled in first part of hike is:

Distance=3\times (2-t)

  • Now, the distance he will travel in second part of hike will be: 5-3(2-t)

Since the total distance traveled by him is 5 miles.

It is given that his speed decreased to 1.5 miles per hour.

Now, we know that:

Time=\dfrac{Distance}{Speed}

Hence, time spent by him in second part of hike is:

t=\dfrac{5-3(2-t)}{1.5}\\\\i.e.\\\\1.5t=5-3(2-t)\\\\i.e.\\\\3(2-t)+1.5t=5

8 0
2 years ago
Read 2 more answers
Other questions:
  • the equation of a curve is xy=12 and the equation of a line l is 2x+y=k where k is a constant .In the case where k=11 find the c
    10·1 answer
  • Please Help! Riley was determined to be on the basketball team. He started practicing for 40 minutes on the first day, and then
    15·2 answers
  • Classify each characteristic according to whether it is true for an amoeba, a clock, or both.
    8·2 answers
  • If s(x) = x – 7 and t(x) = 4x2 – x + 3, which expression is equivalent to (t circle s) (x)?
    7·2 answers
  • In this activity, you will use equations to represent this proportional relationship: Olivia is making bead bracelets for her fr
    9·1 answer
  • The function h(x) = 2.5x + 20 represents your height in inches, h(x), for x years you have been alive. How many inches tall will
    12·1 answer
  • The diagram shows a field.<br>140 m<br>66 m<br>102 m<br>Work out the area of the field.​
    14·1 answer
  • You mix 1-3 teaspoon of baking soda with 3 teaspoon of salt.what is the value of the ratio of baking soda to salt?
    13·1 answer
  • Amy, Rick, and Nisha are investing in three different types of stocks. What type of stock is each person Investing in?
    13·1 answer
  • In a large city, 46% of adults support the local football team building a new stadium. If a poll is taken from a random sample o
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!