1answer.
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
8090 [49]
3 years ago
15

X² + y² = 34x + y =8​

Mathematics
1 answer:
Nataly [62]3 years ago
4 0

Step-by-step explanation:

{x}^{2}  +  {y}^{2}  = 34 \\ x + y = 8 \\ x = 8 - y \\ substitute \: x \: in \\  {x}^{2}  +  {y}^{2}  = 34 \\  {(8 - 4)}^{2}  +  {y}^{2}  = 34 \\  {(8 - 4) }^{2}  =  {y}^{2}  - 16y + 64 \\   {y}^{2}  - 16y + 64 +  {y}^{2}  = 34 \\  {2y}^{2}  - 16y + 64 = 34 \\ {2y}^{2}  - 16y + 64  - 34 = 0 \\  {2y}^{2}  - 16y + 30 = 0 \\ 2 {y}^{2}  - 6y - 10y + 30 = 0 \\ (2 {y}^{2}  - 6y) - (10y + 30) = 0 \\ 2y(y - 3) - 10(y - 3) = 0 \\ (2y - 10)(y - 3) \\ 2y = 10 \\ y  = \frac{10}{2}  \\ y = 5 \\ or \\ y = 3 \\ if \: y = 5 \:  \: x = 3 \\ if \: y = 3 \:  \:  x = 5

You might be interested in
Use rounding to estimate the product.8 × 9.82
aleksley [76]

Answer:

8 * 9.82 ≈ 8 * 10 = 80

Step-by-step explanation:

9.82 ≈ 10

8 * 10 = 80

4 0
3 years ago
Is this relationship linear, exponential, or neither.<br><br> x -12 -6 0 6<br> y 9 12 20 40
Diano4ka-milaya [45]

Answer:

This appears to be exponential based on the plot of these points

Step-by-step explanation:

See image

5 0
2 years ago
What is the mixed decimal 17.45 as a mixed number and reduce to lowest terms
Hunter-Best [27]
17.45  =    17  <u>45</u>
                     100    and you can divide the numerator and denominator by 5

so the final answer is 17 <u> 9
</u>                                     20<u>
</u>
7 0
3 years ago
Which graph shows y=2⌈x⌉−3?
umka2103 [35]

Answer: C

Step-by-step explanation:

5 0
3 years ago
The effect of exposure to high-density automobile traffic either as a bicyclist or pedestrian was compared to minimal or no expo
Ber [7]

The option B is correct option. Thus, the Study design is used is a Case control study.

According to the statement

we have given that the incident cases of MI diagnosed in the emergency rooms of several hospitals is 500 and compared to 1,000 other subjects who visited the same emergency rooms for reasons other than cardiovascular and respiratory diseases.

And we have  to find that the all these type of reports are formed which study method in medical science.

So, For this purpose, we know that the

A case control study is a  study that compares two groups of people: those with the disease or condition under study (cases) and a very similar group of people who do not have the disease or condition (controls).

This study is perfectly match with the given condition.

So,

Case-control study is used in it by the below written way:

The study design relies on hospital-based recruitment of cases (persons with an MI) and controls (other patients in the emergency room who did not have cardiovascular and respiratory diseases which may be associated with air pollution). The exposure under investigation is a time-dependent measure of exposure to high-density automobile traffic in the days preceding the emergency room visit.

So, The option B is a correct option. The Study design is used is a Case control study.

Learn more about Case control study here

brainly.com/question/24087096

Disclaimer: This question was incomplete. Please find the full content below.

Question:

The effect of exposure to high-density automobile traffic either as a bicyclist or pedestrian was compared to minimal or no exposure to automobile traffic. It is hypothesized that direct exposure to automobile traffic has an effect on acute myocardial infarction (MI). This association was studied with 500 incident cases of MI diagnosed in the emergency rooms of several hospitals and compared to 1,000 other subjects who visited the same emergency rooms for reasons other than cardiovascular and respiratory diseases. All subjects were asked to report the amount of time that they spent exposed to high-density traffic over the past month prior to their hospital visit.

What type of study design is this?

A) Cross-sectional

B) Case-control

C) Retrospective cohort

D) Prospective cohort

E) Randomized clinical trial

#SPJ4

5 0
2 years ago
Other questions:
  • Need help with 9-13 please
    12·1 answer
  • Find the x- and y-intercept of the line. <br><br> –3x + 9y = 18
    12·1 answer
  • Organize the following expressions from greatest to least by number of terms: (2 points) I. 6x2 II. 18x2 + 5ab − 6y III. 8a − 5
    13·1 answer
  • If A=1--21-20find the eigenvalues of the matrix A. Your answer should consist of two integers representing the two eigenvalues.
    6·1 answer
  • ILL GIVE BRAINLIEST PLEASE HELP MEEE
    9·2 answers
  • What are the coordinates of Y(-3.5,5) Across the x-axis?
    8·1 answer
  • A plastic bin contains red, yellow, and green key chains. Out of 350 key chains, 10% percent are yellow. Of the remaining key ch
    13·1 answer
  • Jason invests money in an account paying simple interest. He invests $160 and no money is added or removed from the investment.
    12·2 answers
  • Estimate how many times large (6.1) x 10⁷ is than (2.1) x 10⁻⁴ ?
    10·2 answers
  • Simplify<br>answer it<br>b)​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!