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
VashaNatasha [74]
2 years ago
15

Solve the following system of equations using matrices: 4x + 5y = 40 X-y=1

Mathematics
1 answer:
Sergeeva-Olga [200]2 years ago
4 0
I think i’m not sure but i think the answer is (5,4) x=5 and y=4
You might be interested in
An education researcher claims that 58​% of college students work​ year-round. In a random sample of 400 college​ students, 232
Hatshy [7]

Answer:

The proportion of college students who work​ year-round is 58%.

Step-by-step explanation:

The claim made by the education researcher is that 58​% of college students work​ year-round.

A random sample of 400 college​ students, 232 say they work​ year-round.

To test the researcher's claim use a one-proportion <em>z</em>-test.

The hypothesis can be defined as follows:

<em>H</em>₀: The proportion of college students who work​ year-round is 58%, i.e. <em>p</em> = 0.58.

<em>Hₐ</em>: The proportion of college students who work​ year-round is 58%, i.e. <em>p</em> ≠ 0.58. C

Compute the sample proportion as follows:

 \hat p=\frac{232}{400}=0.58

Compute the test statistic value as follows:

 z=\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n}}}=\frac{0.58-0.58}{\sqrt{\frac{0.58(1-0.58)}{400}}}=0

The test statistic value is 0.

Decision rule:

If the p-value of the test is less than the significance level then the null hypothesis will be rejected.

Compute the p-value for the two-tailed test as follows:

 p-value=2\times P(z

*Use a z-table for the probability.

The p-value of the test is 1.

The p-value of the test is very large when compared to the significance level.

The null hypothesis will not be rejected.

Thus, it can be concluded that the proportion of college students who work​ year-round is 58%.

6 0
3 years ago
The crew on a fishing boat caught 4 fish that weighed a total of 1,092 pound. The tarpon weighed twice as much as the amberjack
Savatey [412]

ddddd

Let T be the weight of Tarpon

Let A be the weight of amberjack

Let W be the weight of white marlin

Let TU be the weight of Tuna

The crew on a fishing boat caught 4 fish that weighed a total of 1,092 pound.

Total weight = 1092

T + A + W + TU = 1092

The tarpon weighed twice as much as the amberjack

T= 2 A

  the white marlin weighed twice as much as the tarpon.

W = 2 T

We know T is 2A  so W = 2(2A) = 4 A, W = 4A

The weight of the tuna was 5 times the weight of the Amber jack.

TU = 5A

T = 2A  , W = 4A , TU = 5A

Replace it in our equation

T + A + W + TU = 1092

2A + A + 4A + 5A = 1092

12A = 1092

Divide both sides by 12

A = 91

the weight of amberjack = 91 pounds

the weight of white marlin = 4A = 4(91) = 364 pounds

the weight of Tarpon = 2A = 2(91) = 182 pounds

the weight of Tuna= 5A = 5(91)=455 pounds

7 0
3 years ago
Define democracy?Write any four key elements of democracy. Easy answer required.
umka21 [38]
Democracy: a system of government by the whole population or eligible members of state, typically through elected representatives

elements:
- equality
- accountability
- rule of law
- transparency
6 0
3 years ago
50 points and brainlist!
Lady bird [3.3K]

Answer:

D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which of the following is the equation of a line parallel to the line y = -x + 1, passing through the point (4,1)?
vodomira [7]
The equation is y=-x+5
4 0
3 years ago
Read 2 more answers
Other questions:
  • A box of oatmeal must contain 16 oz. The machine that fills the oatmeal boxes is set so that, on the average, a box contains 16.
    10·1 answer
  • Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gen
    5·1 answer
  • What is the value of y?
    15·1 answer
  • What is the solution -10 = 2a - 4
    11·2 answers
  • Frank wants to earn as many points as possible in one turn in a game. Two number cubes whose
    15·1 answer
  • 9) State the coordinates of the endpoints of a<br> line segment that intersects the y-axis.
    5·1 answer
  • It is not B so plz help me
    6·2 answers
  • Pls decipher the code. Will give brainliest for correct answer tyyyyy
    15·1 answer
  • SOEINE HELP ME ASAPPP PLZ
    10·1 answer
  • If angle DEG is 8x + 14 and angle GEF is 8x - 7, the measure of angle DEG is ___ degrees.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!