3 years ago

10) Solve using any method 10x+2y=42 5x+y=20

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

5 0

The answer is no solution! Using substitution, you come to 20 = -21, which is a false statement.

KIM [24]3 years ago

3 0

Answer:

no solutions

Step-by-step explanation:

10x+2y=42

5x+y=20

Multiply the second equation by -2 to use elimination

-2(5x+y)=20*-2

-10x -2y = -40

Add this to the first equation

10x+2y=42

-10x -2y = -40

--------------------------

0 = 2

This is never true. This means there are no solutions

You might be interested in

What is the value of 24x -60

Aleksandr [31]

Answer:

-1440

Step-by-step explanation:

24x -60 = -1440

3 0

2 years ago

A chocolate chip cookie recipe requires one and three quarters cups of flour to one cup of chocolate chips. If four and two thir

nikitadnepr [17]

1 cup of chocolate chips for every 1and 3/4 cup of flour

so divide 4 and 2/3 x 1 and 3/4

turn them both into fractions

4 2/3 = 14/3

1 3/4 = 7/4

14/3 / 7/4 = 14/3 x 4/7 = 56/21 = 2 and 2/3 cups of chocolate chips are needed

8 0

3 years ago

Alex has a collection of sports cards. There are 10 cards in the collection, and 1/5 of them are hockey cards. Alex decides to d

Alborosie

If 1/5 of the cards are hockey cards, there are 2 hockey cards. if he wants to double that amount, he would multiply it by 2, so 2•2=4. The fraction of hockey cards is now is 2/5.

4 0

2 years ago

Find the partial fraction of the following ???<br>x/(1-x)³

Alja [10]

$\frac{x}{ {1}^{3} - 3x + {3x} - {x}^{3} }$

7 0

3 years ago

During a certain period of time, about 70 northern sea otters had an annual growth of 18%. Use an exponential function to find t

Alenkinab [10]

Answer:

135.71 sea otters

Step-by-step explanation:

y = 70(1.18)^4

y = 70 x 1.9387

y = 135.71

6 0

2 years ago