Ask question

Ask question

All categories

3 years ago

11

Solve 3x+2y=4 4x+3y=7 algebraically

1 answer:

Leona [35]3 years ago

8 0

Step 1. Multiply first equation with -3 and the second one with 2. You'll get:
$\left \{ {{-9x-6y=-12} \atop {8x+6y=14}} \right.$

Step 2. Add both equations together. You'll get:
$-x=2$ , which gives x = -2

Step 3. Replace x = -2 in the first equation and calculate y.
$3(-2)+2y=4\\
y=\frac{4+6}{2}=5$

The solution is: x=-2, y=5

You might be interested in

anonymous anonymous 5 years ago At your favorite taco place you can choose flour or corn tortilla mild salsa medium salsa spicy

gavmur [86]

Ok, I love doing these because they're very simple.
F=flour C=corn
m=mild d=medium s=spicy p=pico
c=cheddar j=monterey jack

Fmc
Fmj
Fdc
Fdj
Fsc
Fsj
Fpc
Fpj
8 Flour, which means 8 corn. So that means there are 16 different tacos.

8 0

3 years ago

The first term of a geometric sequence is 10,000 and the common ratio is 0.4. What

Misha Larkins [42]

$a = 10000$

$r = 0.4 = 4/10 = 2/5$

$a_9 = ar^8 = 10000 × 2^8/5^8$

$a_9 = 10000 × 256/(25 × 25 × 25 × 25)$

$a_9 = 6.5536$

7 0

2 years ago

GEOMETRY HELP PLS! 50 POINTS!!

icang [17]

Answer:

the answer is c

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

What is the solution to this equation x -9=5

lukranit [14]

Answer:

x = 14

Step-by-step explanation:

x- 9 = 5

Note the equal sign, what you do to one side, you do to the other. Isolate the variable, x. Add 9 to both sides of the equation:

x - 9 (+9) = 5 (+9)

x = 5 + 9

x = 14

x = 14 is your answer.

~

7 0

3 years ago

Which formula gives the x-coordinates of the maximum values for y = cos(x)?

solong [7]

We have been given a function $y=\cos(x)$ . We are asked to find the formula which gives the x-coordinates of the maximum values for given function.

We know that cosine function oscillates between $-1$ and 1 that is minimum value of cosine is $-1$ and maximum value is $1$ .

We also know that $\cos(0)=1$ and after period of cosine is $2\pi$ . This means after every $2\pi$ , we will get to $1$ .

So maximum of cosine is $2\pi n$ , where n is an integer.

Therefore, our required formula is $2\pi n$ , where, $n=0,\pm 1,\pm 2,\pm3,...$

7 0

3 years ago