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
Inessa [10]
3 years ago
10

Solve using elimination. 10x + y = -19 10x + 3y = -17

Mathematics
2 answers:
RideAnS [48]3 years ago
4 0

Subtract 10x

10x + y = -19

10x + 3y = -17

You would get:

-2y = -2

Two negatives make a positive number! Divide

y = 1

Plug in

10x + (1) = -19

10x = -20

Divide

x = -2

Your solutions are

x = -2

y = 1

vaieri [72.5K]3 years ago
3 0

we want to add the 2 equations to eliminate a variable

see which constants match

the x's both have 10

multiply the first equation by -1

-10x-y=19

add that to the 2nd equation

-10x-1y=19

<u>10x+3y=-17 +</u>

0x+2y=2


so 2y=2 -> y=1

subsitute to find other number

10x+y=-19

10x+1=-19

10x=-20

divide both sides by 10

x=-2

the solution is (x,y)=(-2,1)

You might be interested in
ALGEBRA 2 word PROBLEM HELP ME PLEASE !!!
gizmo_the_mogwai [7]

Answer:

l = 231 ft (nearest ft)

Step-by-step explanation:

sin60 = 200/x

xsin60 = 200

x = 200/sin60

  = 231 ft (rounded to nearest ft)

3 0
3 years ago
Can someone help me on this question? Harry and Tim both made New Years resolutions. Harry made 5 more resolutions than Tim. Tog
solniwko [45]

Answer:7 I think

Step-by-step explanation:

6 0
3 years ago
What does first difference mean?
Sunny_sXe [5.5K]

Answer:

In statistics and econometrics, the first-difference (FD) estimator is an estimator used to address the problem of omitted variables with panel data. It is consistent under the assumptions of the fixed effects model. In certain situations it can be more efficient than the standard fixed effects (or "within") estimator.

First differences are the differences between consecutive y-‐values in tables of values with evenly spaced x-‐values. If the first differences of a relation are constant, the relation is _______________________________ If the first differences of a relation are not constant, the relation is ___________________________

4 0
2 years ago
Read 2 more answers
What is the first step in solving ln(x − 1) = ln6 − lnx for x?
Stels [109]

Answer:

Option C - Simplify the right side using the "difference of two logs is the log of the quotient" property.

Step-by-step explanation:

Given : Expression \ln (x-1)=\ln 6-\ln x

To find : What is the first step in solving  the expression ?

Solution :

Expression \ln (x-1)=\ln 6-\ln x

Step 1 - Simplify the right side using the "difference of two logs is the log of the quotient" property.

i.e. \ln a-\ln b=\ln(\frac{a}{b})

Apply the first step we get,

\ln (x-1)=\ln(\frac{6}{x})

Therefore, Option C is correct.

6 0
3 years ago
Is it positive or negative or none
Marat540 [252]
Positive because it is increasing
8 0
3 years ago
Read 2 more answers
Other questions:
  • He was just up with me the sum of three consecutive numbers is 41 less than five times the largest number find the largest numbe
    5·1 answer
  • Which inequality is represented by this graph?
    13·1 answer
  • Help me with number 4 pls asap
    5·2 answers
  • Only 5-8 It’s Probability
    13·1 answer
  • What is the awnser again!??!???
    15·2 answers
  • Which transformation will result in a figure with the same size and shape and in the same location as PQRSTU?
    10·1 answer
  • How many terms are in the given expression?<br> 52 + Zn - 2f
    6·2 answers
  • Find the 70th term. 16,21,26,31, ...
    8·1 answer
  • Please Help !!! its a math problem What is the range of the quadratic equation whose graph contains the following points?
    9·1 answer
  • Assume the following 5 scores represent a sample: 2, 3, 5, 5, 6. Transform these scores into z-scores. Show all steps
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!