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
inna [77]
3 years ago
5

7x+2y=19 7x+8y=13 Please solve it by Simultaneous method

Mathematics
1 answer:
elixir [45]3 years ago
4 0

Answer:

y=-1

x=3

Step-by-step explanation:

7x+2y=19-----(1)

7x+8y=13------(2)

(1)-(2)

(7x+2y)-(7x+8y)=19-13

7x+2y-7x-8y=6

+2y-8y=6

-6y=6

y=-1

by substitute in (1)

7x+2*(-1)=19

7x-2=19

7x=19+2

7x=21

x=21/3

x=3

You might be interested in
What is the slope of a line that contains the points (5, -3) and (7, 3)? *
Allisa [31]

Slope formula: y2-y1/x-x1

We can use the given points to solve.

3-(-3)/7-5

6/2

3

Best of Luck!

4 0
3 years ago
Five friends had lunch together. Their lunch bill included these amounts: $8.79, $5.15, $11.73, $2.49, and $9.05. Estimate the t
WARRIOR [948]

Answer:

40

Step-by-step explanation:

all those numbers added equals 37.21

front end estimation is where you round to the first number on the left just ignore the decimal point in this case. so the answer would be 40

7 0
3 years ago
X=a-2by^2<br><br> Make “y” as a subject
Alex Ar [27]

Answer:

Let’s assume a,b,x real. Then all we require of y is y2 is real, so y

can be real or purely imaginary, but not an arbitrary complex number.

The hard question in these is always, do we need ±

? Here the answer is yes. It’s basically asking is there one solution or two, and in this problem we have two.

Solve for y

: x=a−2by2

Step-by-step explanation:

3 0
3 years ago
Solve the proportion: 3/2 = 4/p + 9
AlladinOne [14]

The answer is p = -8/15


Proportion can simply be defined as equating two ratios

The proportion of 3/2 = 4/p +9 can be calculated as follows

3/2 - 9/1 = 4/p

-15/2 = 4/p


cross multiply both sides together to find the value of p

-15×p= 4×2

-15p= 8

p= -8/15

Hence the answer is p= -8/15



Please see the link below for more information
brainly.com/question/12124740?referrer=searchResults


#SPJ1

8 0
2 years ago
The sum of 423 and 65 is
Akimi4 [234]

Answer:

488

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • Someone plz help me with this
    8·1 answer
  • the area of a triangle is 124 square units. what would it's new area be if its base was half as long and its height was three ti
    14·1 answer
  • A pair of jeans costs $89. A jean jacket costs twice as much. What is the total cost of a jean jacket and 4 pairs of jeans?
    15·1 answer
  • A square playground has an area of 169 square yards. There is a fence along one side of the playground. How long is the fence? T
    14·2 answers
  • Find the equation of a line that passes through the point (4,15) and is perpendicular to the equation below.
    8·1 answer
  • K=4d d=5 find k determine the value of the indicated variable
    10·2 answers
  • 3 x 10 + 2 x 1 + 6 x 1|100 + 4 x 1|1,000 is the expanded form of which decimal?​
    10·1 answer
  • The diameter of a circle is 12 1/3 inches.
    9·2 answers
  • Find the distance between A(5, -2) B(3, -6)
    14·1 answer
  • Find the perimeter of the following shape, rounded to the nearest tenth: coordinate plane with quadrilateral ABCD at A 0 comma 0
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!