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
soldier1979 [14.2K]
3 years ago
10

Solve by elimination:4x+7y =8-8x -14y= 5

Mathematics
2 answers:
Anna [14]3 years ago
6 0
\left \{ {\big{4x+7y =8} \atop\big {-8x -14y= 5}} \right.    \\\\  \left \{ {\big{4x+7y =8\ /\cdot2} \atop\big {-8x -14y= 5\ \ }} \right.    \\\\ \left \{ {\big{8x+14y =16} \atop\big {-8x -14y= 5 }} \right.    \\----------\\0=21\\no\ solution
photoshop1234 [79]3 years ago
3 0
\begin{cases}4x+7y =8 \ \ /\cdot 2 \\ -8x -14y= 5 \end{cases}\\ \\\begin{cases}8x+14y =16 \ \ \\ -8x -14y= 5 \end{cases}\\ + \---------\\0 \neq 21 \\ \\ Answer : \ the \ system \ has \ no \ solution


You might be interested in
18. When y = x?, which of the following expressions is<br> equivalent to -y ?
vitfil [10]

Answer:

-y=-x

The problem:

y=x then -y=?

Step-by-step explanation:

If y=x, then -y=-x.

Just like if u=9, then -u=-9.

Or, if -m=8, then m=-8.

5 0
3 years ago
Vanessa has scored 45, 32, and 37 on her three math quizzes. She will take one more quiz and she wants a quiz average of at leas
zhenek [66]

45 + 32 + 37 = 114

114÷3 = 38

4 total quizzes,


 for a 40 average on 4 quizzes she needs 40*4 = 160 total points




for 3 quizzes she has 45 +32 +37 = 114 points


160-114 = 46, she needs at least a 46 on the 4th quiz


6 0
4 years ago
Read 2 more answers
Help pls.preparing for my term exam
aniked [119]

Answer:

2

Step-by-step explanation:

she will have 2 arangments of one rose and two daisies.

5 0
3 years ago
Read 2 more answers
Cameron made a scale drawing of a house. The scale of the drawing was 1 inch = 1 foot.
Rashid [163]
sushi’s wow wow i she sos s
7 0
3 years ago
Prove usin's Mathematical induction 2^n ≤(n+1)!, for n≥0​
Westkost [7]

Answer:

Step-by-step explanation:

2^0 is less than or equal to 1!, because 1<= 1

if 2^n <= (n+1)!, we wish to show that 2^(n+1) <= (n+2)!, since

(n+2)! = (n+1)! * (n+2), and (n+1)!>= 2^n, then we want to prove that n+2<=2, which is always true for n>=0

8 0
2 years ago
Other questions:
  • *PLEASE ANSWER[MULTIPLE CHOICE] FOR BRIANLIEST* (08.01 MC)
    5·1 answer
  • Is this answer ok, please help?
    6·1 answer
  • Algebra 2 help? Will give brainliest
    6·1 answer
  • What is the inverse of the function f(x) = 2x + 1?
    9·1 answer
  • Which student expression is equal to 8×5
    15·1 answer
  • Once a commercial plane reaches the desired altitude,
    15·1 answer
  • What is the volume of this cone?
    6·1 answer
  • Please anyone help me on this
    9·1 answer
  • A -cd for a = 9, b = -3, c = -2 , d= 7
    14·1 answer
  • The length of perpendicular drawn from the opposite vertex to any side is a) altitude b) median c) perpendicular d) angle bisect
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!