3 years ago

Please help urgent

Mathematics

1 answer:

Aliun [14]3 years ago

8 0

Answer:

True

Step-by-step explanation:

You might be interested in

Solve the linear system of equations using the linear combination method.<br> 4x-9y=20<br> 2x-6y=16

maxonik [38]

The solution is (-4,4)

Step-by-step explanation:

Given equations are:

$4x-9y = 20\ \ \ \ Eqn1\\2x-6x = 16\ \ \ \ Eqn2$

In linear combination method, we have to make coefficients of any one variable opposites by multiplying with an integer

So multiplying 2nd equation by -2

$-2(2x-6y=16)\\-4x+6y=-32\ \ \ \ Eqn3$

Adding Equation 1 and Equation 3:

$4x-9y-4x+12y = 20-32\\3y = -12$

Dividing both sides by 3

$\frac{3y}{3} = \frac{-12}{3}\\y = -4$

Putting y=-4 in equation 1

$4x-9(-4) = 20\\4x +36= 20\\4x = 20-36\\4x = -16$

Dividing both sides by 4

$\frac{4x}{4} = \frac{-16}{4}\\x = -4$

Hence,

The solution is (-4,4)

Keywords: Linear combination, linear equations

Learn more about linear combination method at:

#LearnwithBrainly

3 0

4 years ago

I’ll mark you brainliest!!!!! Which situation shows a constant rate of change?

Irina-Kira [14]

Answer:

Step-by-step explanation:

If we make a graph comparing the total cost of the milk and the gallons bought, it will be a straight line, which is a constant rate of change.

4 0

3 years ago

Find the quotient. Write the answer in simplest form.

mariarad [96]

Answer:

A) 28/39

Step-by-step explanation:

$\frac{4}{13} divided by \frac{3}{7}=\frac{4}{13}*\frac{7}{3}\\=\frac{28}{39}\\Keep the first number. Flip the second number. Change the operation- division into multiplication.$

8 0

3 years ago

7 less than 5 times a number

Natasha2012 [34]

Answer:

5x-7

Step-by-step explanation:

5 times x (a number) subtract 7

5 0

2 years ago

HELP PLZ ASAP ITS DUE TOMORROW:(((( HELP

iVinArrow [24]

Answer:

em i think the answer would be 44

6 0

3 years ago