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
Vaselesa [24]
3 years ago
5

Solving Systems of Equations by substitution-5x-8y=172x-7y=-17

Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0
\left\{\begin{array}{ccc}-5x-8y=17\\2x-7y=-17\end{array}\right\\\left\{\begin{array}{ccc}-5x=8y+17&/\cdot(-2)\\2x-7y=-17&/\cdot5\end{array}\right\\\\\left\{\begin{array}{ccc}10x=-16y-34\\10x-35y=-85\end{array}\right\\\\substitute:\\\\-16y-34-35y=-85\\-51y=-85+34\\-51y=-51\ \ \ \ /:(-51)\\y=1\\\\10x=-16\cdot1-34\\10x=-50\ \ \ \ /:10\\x=-5\\\\Solution:x=-5\ and\ y=1
masya89 [10]3 years ago
5 0
-5x=17+8y \\ x= - \frac{17+8y}{5} \\ 2x-7y=-17 \\ 2* \frac{17+8y}{5} -7y=-17 \\ \frac{34+16y}{5} -7y=-17 \ we \ bring \ to \ the \ same \ denominator \ \\34+16y-35y=-85 \\ -19y=-85-34 \\ 19y=119 \\ y= \frac{119}{19} \\ x= -\frac{ 17+ 8* \frac{119}{19} }{5} \\ x= - \frac{ 17 + \frac{952}{19} }{5} \\ x= - \frac{ \frac{323+952}{19}}{5} \\ x= -\frac{ \frac{1275}{19} }{5} \\ x= -\frac{1275}{19} * \frac{1}{5} \\ x= -\frac{255}{19}
You might be interested in
Volume of prisms mathswatch answers
Svetradugi [14.3K]

Answer:

Volume of recangular prisms is l*w*h, triangular prism is (l*w*h)/3

Step-by-step explanation:

8 0
3 years ago
67 1/2% of what number of people is 135 people
Tanzania [10]

Answer:

go to omnicalculator.com they have all sorts of calculators including one called a percent changer calculator

Step-by-step explanation:

4 0
3 years ago
I need help with this question!!!
Nuetrik [128]

Answer: B. positive 6

Step-by-step explanation: Addomg the positive number to a negative number would turn it to a positive eventually. So u covert your factions to decimals to better see the resemblance. And 1 1/2 is the same as 1.5, and 2 1/10 is the same as 2.1 but it’s easier to deal with decimals. So then just add the positive to the negative sense 1 1/2 is closer to zero. I hope this helps I’m not the best at explaining things

7 0
3 years ago
What is the factorization of the polynomial below?<br> 5x2 - 35x + 60
natita [175]

Answer:

5(x-3)(x-4)

Step-by-step explanation:

5x^2-35x+60

Start by factoring out a 5:

5(x^2-7x+12)

We need to find two integers that have a product of 12, and a sum of -7:

(-3)(-4)=12

-3-4=-7

We can split -7x into -3x and -4x

5(x^2-3x-4x+12)

Factor each half separately:

5[x(x-3)-4(x-3)]

Since x and -4 are both being multiplied by x-3, we can combine them:

5(x-3)(x-4)

7 0
2 years ago
Inequality n &lt; -5<br> HELPPP ASAPPP
ale4655 [162]

Answer:

please give me a brainless 0

Inequality :

α1+(n−1)a−(⌊n÷m⌋×(a−b))≥x

The following is as far as I get:

α1+(n−1)a−(⌊n÷m⌋×(a−b))≥x

(n−1)a−(⌊n÷m⌋×(a−b))≥x−α1

n−1−(⌊n÷m⌋×(a−b))≥x−α1a

n−(⌊n÷m⌋×(a−b))≥x−α1a + 1

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Write the equation y = 0.445x + 14.7 as function P.
    8·1 answer
  • What are 2 numbers that round to 264.5 when rounded to the nearest tenth
    14·2 answers
  • Which is the vertex of x2 + 10x= - 17?<br> (-5.-8)<br> (5.8)<br> (-5.8)<br> (5.-8)
    13·1 answer
  • Why are people at new madrid bend youth center so hurtful
    13·1 answer
  • What is the value of y
    10·1 answer
  • Homework help ASAP
    6·1 answer
  • What do you mean by trigonometry​
    12·1 answer
  • NEED HELP THIS IS MY LAST QUESTION (WRONG ANSWERS GET BLOCKED)
    5·1 answer
  • A rule in a relation in which each input is paired with, or assigned to, exactly one output.
    14·1 answer
  • 7 time 45 please i need help this for the class
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!