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
vlabodo [156]
3 years ago
6

Use the substitution method to solve each linear system. 4x - 3y = -13,-2x + y = 4

Mathematics
1 answer:
Contact [7]3 years ago
8 0

Answer:

The solutions to the system of equations are:

x=\frac{1}{2},\:y=5

Step-by-step explanation:

Given the system of the equations

\begin{bmatrix}4x-3y=-13\\ -2x+y=4\end{bmatrix}

Isolate x for for 4x-3y=-13

4x-3y=-13

4x=-13+3y

Divide both sides by 4

x=\frac{-13+3y}{4}

substitute y=5

x=\frac{-13+3\cdot \:5}{4}

x=\frac{1}{2}

The solutions to the system of equations are:

x=\frac{1}{2},\:y=5

You might be interested in
Can someone please help me with this maths question
GrogVix [38]
1. .11111 (continued)
2. .015625
3. .015625
6 0
4 years ago
Read 2 more answers
Sarah earned $175 babysitting for her neighbors. If she saved 40% of her money how much did she save?
S_A_V [24]

Answer:

70 dollars

Step-by-step explanation:

40% of 175 is 70

6 0
3 years ago
Read 2 more answers
PLEASEEEEEEEEEE HELPPPPPPPPPPPPp<br> It is in the picture.
In-s [12.5K]

Answer: D

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Please help need answer asp
N76 [4]
I'm pretty sure the answer is 12.
4 0
3 years ago
8. For many computer tablets, the owner can set a 4-digit pass code to lock the device.
Anton [14]

Answer:

a. There 5040 different pass codes if the digits cannot be repeated

b. The probability that the pass code is 1234 is ≈ 0.0002

c.  The probability that two people both have a pass code of 1234 is 4×10^{-8}

Step-by-step explanation:

a. How many different 4-digit pass codes are possible if the digits cannot be repeated?

There are

  • 10 possibilities for the first digit
  • 9 possibilities for the second digit
  • 8 possibilities for the third digit
  • 7 possibilities for the fourth digit

Thus there are  10×9×8×7=5040 different pass codes

b. If the digits of a pass code are chosen at random and without replacement from the digits, what is the probability that the pass code is 1234

The probability that the first digit is 1 is \frac{1}{10}

The probability that the second digit is 2 is \frac{1}{9}

The probability that the second digit is 3 is \frac{1}{8}

The probability that the fourth digit is 4 is \frac{1}{7}

Thus  the probability that the pass code is 1234 is \frac{1}{10} * \frac{1}{9} *\frac{1}{8} *\frac{1}{7} =\frac{1}{5040} ≈ 0.0002

c. The probability that two people, who both chose a pass code by selecting digits at random and without replacement, both have a pass code of 1234?

The probability that the pass code of the one person is 1234 is 0.0002

The probability that the pass code of the other person is 1234 is 0.0002

Thus, the probability that two people have both pass code of 1234 is

0.0002×0.0002 = 4×10^{-8}

3 0
4 years ago
Other questions:
  • HEELPPP PLLEEAAASSEEE Literal equations and formulas
    7·1 answer
  • Connor earned three dollars every 1.5 hours. How many dollars would Connor earn after working three hours and six hours
    6·2 answers
  • What is the area of this circle that is 98cm in diameter
    7·1 answer
  • Problem Page Maya purchased a prepaid phone card for $30 . Long distance calls cost 18 cents a minute using this card. Maya used
    7·1 answer
  • Find the exact circumference of the circle.
    11·1 answer
  • Can u please help my friend with this she really needs it
    5·1 answer
  • Guys, I need help ASAP!!
    7·2 answers
  • Please help me ! I’ll give brainliest
    7·1 answer
  • 1. (Chapter 1) How does Mama react when Miss Crocker tell her about Cassie and Little Man’s behavior in class? How can you expla
    11·1 answer
  • It is used to represent the product
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!