What is the best first step for solving the given system using substitution while avoiding fractions? =9x+4x=10 -9x+3y=3

solve for x in the first equation.
solve for y in the first equation.
solve for x in the second equation.
solve for y in the second equation.

  Solve for y in the second equation

Step-by-step explanation:

We assume your system is ...

Dividing the second equation by 3 gives ...

  -3x +y = 1

so an expression for y without fractions can be found by solving for y, that is, by adding 3x:

  y = 3x +1

Comment on alternate solution

We'd be tempted to solve the first equation for -9x and substitute for that.

  -9x = 10 -4y

  (10 -4y) +3y = 3 . . . . . substitute for -9x

  -y = -7 . . . . . . . . . . . . . simplify, subtract 10

  y = 7 . . . . . . . . . . . . . . multiply by -1

Solve for y in the second equation

D is correct

Step-by-step explanation:

Given: 9x+4y=10 and -9x+3y=3 system of equation.

We are given system of equation in x and y form of straight line.

We need to solve for x and y without using fraction.

We will choose those equation  has common factor.

If we pick first equation coefficients are 9,4 and 10.

Here, no any common factor.

Now we pick second equation.

-9x+3y=3

Common factors of coefficients are 3

If we divide each term by 3 we will get coefficient of y be 1 and rest are not in fraction.

So, we will pick second equation and solve for y.

-9x + 3y = 3

Divide by 3 both sides to each term

-3x + y = 1

Add 3x both sides

y = 3x + 1

So, we get y = 3x + 1 . In this equation none is fraction term.

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice