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
Dmitrij [34]
3 years ago
12

Solve the given system of equations utilizing either the substitution or addition method.

Mathematics
1 answer:
Nataly [62]3 years ago
4 0

Answer:

Value of x=4 and y=-13/3

Step-by-step explanation:

We need to solve the systems of equations

5x+3y=7 \ and \ \frac{3}{2}x-\frac{3}{4}y =9\frac{1}{4}

Solving using substitution method:

Let:

5x+3y=7---eq(1) \\ \frac{3}{2}x-\frac{3}{4}y =9\frac{1}{4}---eq(2)

Find value of x from eq(1) and put in eq(2)

5x+3y=7\\5x=7-3y\\x=\frac{7-3y}{5}

Put value of x in eq(2)

\frac{3}{2}(\frac{7-3y}{5}) -\frac{3}{4}y =\frac{37}{4}\\\frac{21-9y}{10} -\frac{3}{4}y =\frac{37}{4}\\Taking \ LCM\\\frac{21*2-9y*2-3y*5}{20}  =\frac{37}{4}\\\frac{42-18y-15y}{20}  =\frac{37}{4}\\42-33y=\frac{37}{4}*20\\42-33y=185\\-33y=185-42\\-33y=143\\y=\frac{143}{-33}\\y=-\frac{13}{3}

Now, finding value of x by putting value of y in eq(1)

x=\frac{7-3y}{5}\\x= \frac{7-3(-\frac{13}{3}) }{5}\\x=\frac{7+13}{5}\\x=\frac{20}{5}\\x=4

So, Value of x=4 and y=-13/3

You might be interested in
Please help me out here! I’ll give you brainliest if you give me the correct answer :)
antoniya [11.8K]

Answer:

Step-by-step explanation:

5 minutes, 8 minutes, 6 minutes

3 0
3 years ago
Multiply the following<br>1)34/7×3<br>2)3/8×7<br>3)3/4×7​
Gelneren [198K]

Answer:

1) 102/21

2) 21/51

3) 21/24

Step-by-step explanation:

7 0
3 years ago
4) HELP ASAP is about cylinders and stuff and I have to wash dishes and stuff so please help me and if you can show work that wo
Nutka1998 [239]

Answer:

<h2>C. 533.8 ft. squared</h2>

Step-by-step explanation:

Depending on the Pi that you use, the answer should be fairly close, for this I used the full Pi in the equation and got about 534.07 and answer C is closest to that answer so C is the best option.

Hope this helps! Have a good day/night!

5 0
3 years ago
Read 2 more answers
How do you solve this y= 6x - 3 y= -3 i need to graph so if you can show how to graph it also
nalin [4]

Answer:

:)

Step-by-step explanation:

y=6x-3

y=-3

-3=6x-3

-3=6x-3

+3     +3

=6x

3 0
3 years ago
Read 2 more answers
The mass of earth is 5.9 x 10^24. The mass of Pluto is 13,000,000,000,000,000,000,000 kg. Compared to Pluto, how much greater is
nadya68 [22]
5.9 × 10^24 = 5,900,000,000,000,000,000,000,000 minus
13,000,000,000,000,000,000,000 equals
5,887,000,000,000,000,000,000,000 kg
which is the amount greater that Earth's mass is. you could write this problem as
5.9 × 10^24 - 13 × 10^21 = 5.887 × 10^21
7 0
3 years ago
Other questions:
  • What is the greatest common factor of these? 27y^7x^8w^4 and 18y^3w^6
    6·1 answer
  • Kinda stuck please help would appreciate it :)
    11·2 answers
  • At the start of a race, a runner’s velocity changes from 0 to 4.0 m/s. It takes him 2 seconds to speed up. His acceleration is _
    7·2 answers
  • Your company has just taken out a 1-year installment loan for $72,500 at a nominal rate of 20.0% but with equal end-of-month pay
    14·1 answer
  • I need help? someone please explain to me
    10·1 answer
  • What is the area of a triangle that has a base of 15 yards and a height of 11 yards?
    6·1 answer
  • What is the domain function y=^4sqrtx-1
    5·1 answer
  • Find the volume of the cylinder
    8·1 answer
  • Find the sum of the first 10 terms of the following geometric sequences: 3,6,12,24,48
    10·1 answer
  • Which pair of equations generates graphs with the same vertex?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!