3 years ago

Solve for x and y. 3x+8y=20. 5x+3y=23

Mathematics

2 answers:

GrogVix [38]3 years ago

6 0

Answer:

x=4 and y=1

Step-by-step explanation:

Equation 1) 3x+8y=20

Equation 2) 5x+3y=23

Equation 1) 5(3x+8y=20 )

Equation 2) 3(5x+3y=23)

15x+40y=100

15x+9y=69

(Take away 40y from 9y and 100 from 69)

31y = 31

y=1

Substitute y=1 into equation 1)

3x+8=20

(Take away 8 from both sides)

3x=12

(Divide by 3)

x=4

Virty [35]3 years ago

4 0

Answer:

Equation 1:

x= -8/3y + 20/3

y= -3/8x + 5/2

Equation 2:

x= -3/5y + 23/5

y= -5/3x + 23/3

Step-by-step explanation:

SEE BELOW FOR STEPS

You might be interested in

What is a rational number?

slamgirl [31]

Any number that can be rewritten as a simple fraction is a rational number. This means that natural numbers, whole numbers and integers, like 5, are all part of the set of rational numbers as well because they can be written as fractions, as are mixed numbers like 1 ½.

8 0

3 years ago

A downtown building is 880 feet tall. Ana makes a scale model of the building at 1:440 of its actual size how tall is the model?

Olenka [21]

Answer:

2 feet

Step-by-step explanation:

880/440 = 2

7 0

3 years ago

How to i expand this ? x3 (3x - 5)

Nikitich [7]

Use the distributive formula

a(b - c) = ab - ac

$x^3(3x - 5) = \boxed{\bf{3x^4 - 5x^3}}$

5 0

3 years ago

A-15=4a-3<br> if u dont want spam then dont answer

balu736 [363]

Answer:

they deleted my answer :(

Step-by-step explanation:

7 0

3 years ago

PLEASE NO LINKS OR SITES!!!! JUST ANSWERS. THANK YOU!

ladessa [460]

Answer:

7 pizzas, EDGE 2020? Lol

5 0

3 years ago