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
Paladinen [302]
3 years ago
6

A student is trying to solve the set of two equations given below:

Mathematics
1 answer:
klemol [59]3 years ago
7 0
If you would like to eliminate the z-term, you can do this using the following steps:

x + z = 6       /*(-2)
3x + 2z = 1
_____________
-2x -2z = -12
<span>3x + 2z = 1
</span><span>_____________
</span>-2x + 3x = -12 + 1
x = -11

The correct result would be <span>x + z = 6       /*(-2).</span>
You might be interested in
By the literal surface of the triangular prism 90 in2 110 in2 120 in2 130 in2
Sergio039 [100]

Answer:

3

Step-by-step explanation:

Your answer is 3

8 0
2 years ago
Read 2 more answers
Ten engineering schools in the United States were surveyed. The sample contained 250 electrical engineers, 80 being women; 175 c
steposvetlana [31]

Answer:

There is a significant difference between the two proportions.

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for difference between population proportions is:

CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}

Compute the sample proportions as follows:

\hat p_{1}=\frac{80}{250}=0.32\\\\\hat p_{2}=\frac{40}{175}=0.23

The critical value of <em>z</em> for 90% confidence interval is:

z_{0.10/2}=z_{0.05}=1.645

Compute a 90% confidence interval for the difference between the proportions of women in these two fields of engineering as follows:

CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}

     =(0.32-0.23)\pm 1.645\times\sqrt{\frac{0.32(1-0.32)}{250}+\frac{0.23(1-0.23)}{175}}\\\\=0.09\pm 0.0714\\\\=(0.0186, 0.1614)\\\\\approx (0.02, 0.16)

There will be no difference between the two proportions if the 90% confidence interval consists of 0.

But the 90% confidence interval does not consists of 0.

Thus, there is a significant difference between the two proportions.

4 0
3 years ago
find the volume of the smallest right circular cylinder that will hold a sphere whose radius is 4 meters. find the volune of the
Sonja [21]
\bf \textit{volume of a sphere}\\\\&#10;V=\cfrac{4\pi r^3}{3}\quad &#10;\begin{cases}&#10;r=radius\\&#10;------\\&#10;r=4&#10;\end{cases}\implies V=\cfrac{4\pi 4^3}{3}\implies V=\cfrac{256\pi }{3}\\\\&#10;-------------------------------\\\\&#10;\cfrac{sphere}{cylinder}\qquad \cfrac{2}{3}\impliedby ratio~thus\implies \cfrac{2}{3}=\cfrac{\stackrel{sphere}{v}}{\stackrel{cylinder}{v}}&#10;\implies &#10;\cfrac{2}{3}=\cfrac{\frac{256\pi }{3}}{v}&#10;\\\\\\&#10;v=\cfrac{3\cdot \frac{256\pi }{3}}{2}\implies v=\cfrac{256\pi }{2}\implies v=128\pi
8 0
3 years ago
Place on,number line
Alex
A goes between -1 and -1/2
8 0
3 years ago
Read 2 more answers
LCM of 16, 28, and 56
Sindrei [870]

Answer:

2

Step-by-step explanation:

2x8=16, 2x14=28, and 2x28=56

6 0
3 years ago
Other questions:
  • Antonio finds a pair of skis that cost $350 before tax. Sales tax is 6%. What is the total cost Antonio will have to pay for the
    10·1 answer
  • What should be done to both sides of the equation in order to solve -5m=-40
    8·2 answers
  • Which one is the answer ?
    7·1 answer
  • Which of the following equations is equivalent to 3x + 4y =15
    6·1 answer
  • A rectangular prism has a base that is 5 cm by 7 cm and a height of 12 cm. if all dimensions are doubled, what happens to the vo
    5·2 answers
  • ((8 ÷ 2 ( 3 + 3 ))) ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ Answer: ♫・*:.。. .。.:*・ Hewwo frwind! ♫・*:.。. .。.:* I know the answer i
    5·1 answer
  • What’s the correct mathematical expression for 2 groups of z
    11·1 answer
  • A department store buys 100 shirts at a cost of $2,400 and sells them at a selling price of $30 each.
    6·2 answers
  • Trying again. Can someone please help me asap? Please, thank you.
    14·1 answer
  • If y=3x+4 we’re changed to y=5x+4 how would the graph of the new function compare with the first one
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!