Ask question

Ask question

All categories

3 years ago

12

Solve the system by substitution. -2y = x 7x+9y = -45

1 answer:

Soloha48 [4]3 years ago

7 0

Answer:

9

Step-by-step explanation:

substitute the value

You might be interested in

An amount of $41,000 is borrowed for 7 years at 7.5% interest, compounded annually. If the loan is paid in full at the end of th

Maslowich

I=prt
I= 41,000 * 0.075 * 7
41,000 * 0.075 * 7 = 21,525
Answer= 21,525

4 0

3 years ago

Naddika [18.5K]

Answer:

Option A.

Step-by-step explanation:

Definition of Boyle's law: a law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature. There is thus a relationship between volume and pressure of the gas thus option B and C are incorrect.

6 0

3 years ago

Line FG goes through the points (4,9) and (1,3). Which equation represents a line that is perpendicular to FG and passes through

stiks02 [169]

Answer:

$x + 2y= 2$

Step-by-step explanation:

Given

Points:

$F = (4,9)$

$G = (1,3)$

Required

Determine the equation of line that is perpendicular to the given points and that pass through $(2,0)$

First, we need to determine the slope, m of FG

$m = \frac{y_2 - y_1}{x_2 - x_1}$

Where

$F = (4,9)$ --- $(x_1,y_1)$

$G = (1,3)$ --- $(x_2,y_2)$

$m = \frac{3 - 9}{1 - 4}$

$m = \frac{- 6}{- 3}$

$m =2$

The question says the line is perpendicular to FG.

Next, we determine the slope (m2) of the perpendicular line using:

$m_2 = -\frac{1}{m}$

$m_2 = -\frac{1}{2}$

The equation of the line is then calculated as:

$y - y_1 = m_2(x - x_1)$

Where

$m_2 = -\frac{1}{2}$

$(x_1,y_1) = (2,0)$

$y - 0 = -\frac{1}{2}(x - 2)$

$y = -\frac{1}{2}(x - 2)$

$y = -\frac{1}{2}x + 1$

Multiply through by 2

$2y = -x + 2$

Add x to both sides

$x + 2y= -x +x+ 2$

$x + 2y= 2$

Hence, the line of the equation is $x + 2y= 2$

8 0

3 years ago

Read 2 more answers

Which pair are solutions to the equation?

Debora [2.8K]

4xy+8=36
-8 -8
4xy=28
\4 \4
xy=7

3 0

3 years ago

In 1992, Jason bought a gallon of gas for $1.15. Yesterday, he bought a gallon of gas for $2.12. What is the percentage increase

earnstyle [38]

I think it is b hope this helps

4 0

3 years ago