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
dlinn [17]
2 years ago
5

URGENT!!!

Mathematics
1 answer:
notka56 [123]2 years ago
7 0

Answer:

Option (d) is correct.

Step-by-step explanation:

The equations are :

-x-2y=-4  .....(1)

3x+y=12 ....(2)

Equation (1) can be rewritten as follow :

-x = -4+2y

x = 4-2y .....(3)

So, to solve the above systems of equations, we must substitute the value of x from equation (3) in equation (2). Hence, the correct option is (D).

You might be interested in
Light from the sun can travel a million miles in 5.368 second how many seconds is that rounded to the nearest tenth of a second
weqwewe [10]
5.4 rounded to the nearest tenth of a second
3 0
2 years ago
Read 2 more answers
Find the exact length of the curve. x=et+e−t, y=5−2t, 0≤t≤2 For a curve given by parametric equations x=f(t) and y=g(t), arc len
Rama09 [41]

The length of a curve <em>C</em> parameterized by a vector function <em>r</em><em>(t)</em> = <em>x(t)</em> i + <em>y(t)</em> j over an interval <em>a</em> ≤ <em>t</em> ≤ <em>b</em> is

\displaystyle\int_C\mathrm ds = \int_a^b \sqrt{\left(\frac{\mathrm dx}{\mathrm dt}\right)^2+\left(\frac{\mathrm dy}{\mathrm dt}\right)^2} \,\mathrm dt

In this case, we have

<em>x(t)</em> = exp(<em>t</em> ) + exp(-<em>t</em> )   ==>   d<em>x</em>/d<em>t</em> = exp(<em>t</em> ) - exp(-<em>t</em> )

<em>y(t)</em> = 5 - 2<em>t</em>   ==>   d<em>y</em>/d<em>t</em> = -2

and [<em>a</em>, <em>b</em>] = [0, 2]. The length of the curve is then

\displaystyle\int_0^2 \sqrt{\left(e^t-e^{-t}\right)^2+(-2)^2} \,\mathrm dt = \int_0^2 \sqrt{e^{2t}-2+e^{-2t}+4}\,\mathrm dt

=\displaystyle\int_0^2 \sqrt{e^{2t}+2+e^{-2t}} \,\mathrm dt

=\displaystyle\int_0^2\sqrt{\left(e^t+e^{-t}\right)^2} \,\mathrm dt

=\displaystyle\int_0^2\left(e^t+e^{-t}\right)\,\mathrm dt

=\left(e^t-e^{-t}\right)\bigg|_0^2 = \left(e^2-e^{-2}\right)-\left(e^0-e^{-0}\right) = \boxed{e^2-\frac1{e^2}}

5 0
2 years ago
What is the longest side of a right triangle called?
liraira [26]

Answer:

Step-by-step explanation:

hypotenuse

5 0
2 years ago
Read 2 more answers
Surface Area of Cylinders - Item 1175
mylen [45]

The surface area is 47.1 sq in.

Step-by-step explanation:

Given,

The height (h) of the coin (cylinder shaped) = 5 inches

The radius (r) = 1.5 inches

To find the surface area of the coin.

We need to find the lateral surface area of the coin.

Formula

The surface area of the coin of radius r and height h is 2πrh.

Now,

Putting the value of h and r and π=3.14 we get,

Area = 2×3.14×1.5×5 sq inches

= 47.1 sq in

Hence, the surface area is 47.1 sq in.

5 0
2 years ago
PLEASE HELP 20 POINTS AND WILL GIVE BRAINLIEST
topjm [15]

Answer:

25

Step-by-step explanation:

maybe

8 0
2 years ago
Other questions:
  • The graph below shows a dilation. Jacky says that the original image was enlarged, but Juan thinks the original image was reduce
    9·1 answer
  • The lengths of nails produced in a factory are normally distributed with a mean of 5.02 centimeters and a standard deviation of
    7·1 answer
  • How much greater is the volume of the large truck than thr volume of the small truck
    14·1 answer
  • At a convention there are 7 mathematics instructors, 5 computer science instructors, 3 history instructors, and 4 english instru
    7·1 answer
  • How many ads had at least 15, but fewer than 30, words?<br><br><br><br> 1234500372308
    12·1 answer
  • I need help!!! plz use phototmath
    11·1 answer
  • Write 13/5 as a mixed number
    5·1 answer
  • D(n) = \dfrac{5}{16} \left(2\right)^{n - 1}d(n)= 16 5 ​ (2) n−1 d, left parenthesis, n, right parenthesis, equals, start fractio
    11·2 answers
  • If 8 out of 40 people over the age 95 are female, how many are male?​
    13·2 answers
  • The Captain has probability 2/3 of hitting the pirate ship. The pirate only has one good eye, so he hits the Captain's ship with
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!