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
liq [111]
3 years ago
13

Y = 5x - 13 4x + 3y = 18

Mathematics
1 answer:
hram777 [196]3 years ago
3 0
<span>replace Y = 5x - 13
into
4x + 3y = 18

</span>

4x + 3 (5x - 13) = 18
4x + 15 - 39 = 18
4x -24 = 18
4x = 18 +24
4x = 42
x = 42/4
x = 10.5

Y = 5(10.5) - 13
=  52.5 - 13
= 39.5

answer: x = 10.5 and y = 39.5
You might be interested in
Geometry One side of a rectangle is 5 inches long. Another side of the rectangle is 7 inches long. What are the lengths of the o
hoa [83]
5 and 7 since  rectangles must have a pair of each sides
4 0
3 years ago
Question Help Scores of an IQ test have a​ bell-shaped distribution with a mean of 100100 and a standard deviation of 1010. Use
3241004551 [841]

Answer:

a) 95% percentage of people has an IQ score between 80 and 120.

b) 68% percentage of people has an IQ score between 90 and 110.    

c) 2.5% percentage of people has an IQ score greater than 120.          

Step-by-step explanation:

The empirical formula states that:

  • The empirical rule is known as the three-sigma rule or 68-95-99.7 rule.
  • It is a rule which states that for a normal distribution, almost all data falls within three standard deviations of the mean.
  • 68% of data falls within the first standard deviation that is \mu \pm \sigma
  • 95% of data falls within the second standard deviation that is \mu \pm 2\sigma
  • 99.7% of data falls within the third standard deviation that is \mu \pm 3\sigma

a)  percentage of people has an IQ score between 80 and 120

(80, 120) can be written as:

(80, 120) = (100-2(10), 100 + 2(10))\\= (\mu \pm 2\sigma)

Thus, it is the interval within two standard deviation from the mean.

Thus, by empirical formula, 95% percentage of people has an IQ score between 80 and 120.

b) percentage of people has an IQ score between 90 and 110

(90, 110) can be written as:

(90, 110) = (100-1(10), 100 + 1(10))\\= (\mu \pm 1\sigma)

Thus, it is the interval within one standard deviation from the mean.

Thus, by empirical formula, 68% percentage of people has an IQ score between 90 and 110.

c) P(score greater than 120)

= 1 - percentage of score less than 80 - percentage of score between 80 and 120

= 1 - (95\% + 2.5\%) = 2.5\%

From empirical formula,

2.5% percentage of people has an IQ score greater than 120.

6 0
3 years ago
What decimal number is equal to 3/18
almond37 [142]
The answer for this would be 0.167
3 0
3 years ago
Read 2 more answers
To prove that the triangles are similar by the SAS similarity theorem, it needs to be shown that
vesna_86 [32]

Answer:

The triangle has two sides that are equivalent and the angle where the two meet are also equivalent.

In other words, two sides and the angle between them are congruent.

Hope this helps, if it does please give me brainliest, it will help me a lot :)

Have a good day

3 0
3 years ago
What is mean, median, mode,and range.
Alex17521 [72]
Mean is the same as the average
median is the middle number
mode is the number that is used most often
range is the highest number minus the lowest number

example : 
2,3,3,5,7

u find the mean by adding up all the numbers, then dividing by how many numbers there are. (2 + 3 + 3 + 5 + 7) / 5 = 20/5 = 4 (the mean)

the median would be the middle number, and that would be 3

the mode would be the number that appears the most..that would be 3 because it appears twice.

the range is the highest - lowest : 7 - 2 = 5 (the range)...bur dont get this confused by the interquartile range..it is not the same as the range.
3 0
3 years ago
Other questions:
  • 2. You have a set of three similar gift boxes. Each box is a rectangular prism. The large box has 15-cm base edges. The medium b
    11·1 answer
  • Wells college in New York was once an all-girls college. I'm 2005, the college began to allow boys to enroll. By 2012, the ratio
    9·1 answer
  • 3. Which point lies inside the circle with equation (x - 2)2 + (y + 3)2 = 4?
    9·2 answers
  • Which best describes the relationship between the line that passes through the points (–6, 5) and (–2, 7) and the line that pass
    7·1 answer
  • Verify the claim that, in terms of gigaelectronvolts, the mass of an mass of an electron is 0.000511
    6·1 answer
  • 105 is a perfect square. Question 1 options: True False
    13·1 answer
  • Can ya help me with the answer please and thank you so much
    8·1 answer
  • If x is 8687 then what y in the equation x+y=9787
    14·2 answers
  • PLEASE I WILL GIVE BRAINLIEST
    6·1 answer
  • I need help pls asap I cant figure it out
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!