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
schepotkina [342]
3 years ago
13

Solve the system of equations using linear combination method or substitution method. Show all steps.

Mathematics
1 answer:
Korvikt [17]3 years ago
7 0

Answer:

{x,y} = {19/12,5/6}

Step-by-step explanation:

You might be interested in
I need help with this question
Alex787 [66]

Answer:

<h2>C</h2>

Step-by-step explanation:

using the pythagorian theorem, we know that a^2+b^2=c^2. inputting the numbers into this equation, we get

8^2+23^2=c^2

then, using our big math brains, we get 64+529=c^2

adding together the numbers, we end up with 593

just take the sqyare root of that and bada bing bada boom! you get 24.35, or 24.4, therefore the answer is C

3 0
2 years ago
How do I solve this problem?
Gre4nikov [31]
(6b + 42)(b - 3)
To check the answer, use the method FOIL.

3 0
3 years ago
Can the degree of a monomial ever be a negative? please explain why or why not.
lana [24]
Greetings!

Yes, the degree on a monomial can be negative:

Example:
9x^{-2}

This is equal to:
1/9x^{2}

Hope this helps.
-Benjamin
3 0
3 years ago
A random sample of 20 purchases showed the amounts in the table (in $). The mean is $49.57 and the standard deviation is $20.28.
son4ous [18]

Answer:

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.98}{2} = 0.01

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.01 = 0.99, so z = 2.325

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.325*\frac{20.28}{\sqrt{20}} = 12.17

The lower end of the interval is the mean subtracted by M. So it is 49.57 - 12.17 = $37.40.

The upper end of the interval is the mean added to M. So it is 49.57 + 12.17 = $61.74.

The 98​% confidence interval for the mean purchases of all​ customers is ($37.40, $61.74).

3 0
3 years ago
The graph below shows the quadratic function f, and the table below shows the quadratic function g.
valkas [14]
I think the correct answer is D), I’m sorry if it’s wrong
5 0
3 years ago
Other questions:
  • An ocbpus has 8 legs.
    11·2 answers
  • Plz help me wit this
    12·2 answers
  • Solve for z.<br> a(5 - 2) = bx – 8<br><br> x=
    8·2 answers
  • 6. Select the coldest temperature from the list below. * O -11°F O 7°F O -4°F O 20°F​
    9·1 answer
  • Length in the boundary of any figure is called​
    10·1 answer
  • Which equation describes the line that has a slope of –2 and passes through the point (1,3)?
    8·2 answers
  • Plz help me with this
    9·2 answers
  • Hello hello helppppppppppppp
    8·2 answers
  • WILL GIVE BRAINLIEST How do you factor out the squared term's constant? (completing the square for a parabola)
    15·1 answer
  • A projectile is fired from the ground with an upward speed of 245 m/s. What is the maximum height of the projectile?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!