All categories

3 years ago

How do i solve 5x-9y=-17 and 5x+3y=19 in elimation

1 answer:

8 0

A) 5x -9y = -17
B) 5x +3y = 19
If we multiply equation A by -1

A) -5x +9y = 17 then add it to B)
B) 5x +3y = 19
12y = 36
y = 3
we have eliminated the "x" term.

You might be interested in

4.18 repeating as a fraction

olga_2 [115]

Answer: it’s 148 also i don’t know if you mean 4.18 as a fraction?

Step-by-step explanation:

6 0

2 years ago

If 15 litres of paint covers an area of 250 m2, what area (in m2) will 20 litres of paint cover?

Korvikt [17]

Answer: 333.33m²

Step-by-step explanation:

Since we are informed that 15 litres of paint covers an area of 250 m2, the the area that 1 liter of paint will cover will be:

= 250m²/15

= 16.666667m²

Therefore, the area that 20 litres of paint will cover will be:

= 16.666667m² × 20

= 333.33m²

8 0

2 years ago

Find the exact value of c

Rainbow [258]

Answer:

depends on the question

8 0

3 years ago

Give a recursive definition of each of these sets of ordered pairs of positive integers. [Hint: Plot the points in the set in th

konstantin123 [22]

Answer:

(2,1), (1,2) is your base step

if (a,b) is in the set (a+1,b+1) will be in the set

if (a,b) is in the set (a+2,b) will be in the set

if (a,b) is in the set (a,b+2) will be in the set.

Step-by-step explanation:

Think about how to solve this problem in general. How can you assure that the sum a+b is odd ?

Think about this, what happens when you sum two even numbers ? The result is even or odd ?

2+6 = 8 (even )

10+12 = 22 (even)

And what happens when you sum two odd numbers ? The result will be even or odd ? Look

3+7 = 10 (even)

5+11 = 16 (even)

Therefore to assure that a+b is odd, one of them has to be odd and one of them has to be even, that is why

(2,1), (1,2) is your base step

if (a,b) is in the set (a+1,b+1) will be in the set

if (a,b) is in the set (a+2,b) will be in the set

if (a,b) is in the set (a,b+2) will be in the set.

3 0

3 years ago

Need help solving systems of equations with 3 variables

DochEvi [55]

Once you start working problems like these, it pays to get an appropriate calculator.
.. (x, y, z) ≈ (248.01, 43.63, 88.34) . . . . rounded to 2 decimal places

_____
The attempt to convert these to fractions with denominators less than 9999 failed.

5 0

3 years ago