3x+2y=38 x=3y-2 substitution

Answers

Answer 1

Answer:

Step-by-step explanation:

Replace the sec equation on the first one... Find the value of y first.. And then name the value of y as the third equation.. Replace the third equation on the sec one to get the value of x

Related Questions

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What is the answer to 5/8 . 2/7 and what does the dot stand for the dot is actually a little higher

Answers

First, the dot stands for the "product". You have to multiply.

5/8* 2/7
= [5/ (2*4)]* (2/7)
= 5/4* 1/7 (because 2 and 2 cancel out)
= (5*1)/ (4*7)
= 5/28

The final answer is 5/28~

The dot stands for multiplication

Find the arithmetic combination of f(x) =x+2, g(x)=x-2

Answers

Answer:

The arithmetic combinations of given functions are (f + g)(x) = 2x, (f - g)(x) = 4, (f $*$ g)(x) = $\mathrm{x}^(2)-4$ , $\left((f)/(g)\right)(\mathrm{x})=(x+2)/(x-2)$

Solution:

Given, two functions are f(x) = x + 2 and g(x) = x – 2

We need to find the arithmetic combinations of given two functions.

Arithmetic functions of f(x) and g(x) are (f + g)(x), (f – g)(x), (f $*$ g)(x), $\left((f)/(g)\right)(\mathrm{x})$

Now, (f + g)(x) = f(x) + g(x)

= x + 2 +x – 2

= 2x

Therefore (f + g)(x) = 2x

similarly,

(f - g)(x) = f(x) - g(x)

= x + 2 –(x – 2)

= x + 2 –x + 2

= 4

Therefore (f - g)(x) = 4

similarly,

(f $*$ g)(x) = f(x) $*$ g(x)

= (x + 2) $*$ (x – 2)

= x $*$ (x – 2) + 2 $*$ (x -2)

$=x^(2)-2 x+2 x-4$

$=x^(2)-4$

Therefore (f $*$ g)(x) = $x^(2)-4$

now,

$\left((f)/(g)\right)(\mathrm{x})=(f(x))/(g(x))$

$=(x+2)/(x-2)$

$((f)/(g))(x)$ = $(x+2)/(x-2)$

Hence arithmetic combinations of given functions are (f + g)(x) = 2x, (f - g)(x) = 4, (f $*$ g)(x) = $\mathrm{x}^(2)-4$ , $\left((f)/(g)\right)(\mathrm{x})=(x+2)/(x-2)$

Factor completely.6x²+ 3x - 63

A. 3(2x + 7)(x - 3)
B. (3x + 9)(2x - 7)
C. (6x + 21)(x - 3)
D. 3(2x²+ x - 21)

Answers

If you wanted to work this question forwards instead of backwards, this is how you would do it:

First, factor out a 3, since all of the coefficients are divisible by it.

$6x^2+3x-63 \n 3(2x^2+x-21)$

You want to split the middle into two numbers that multiply to equal the product of the value of x² and the constant and add to equal the value of x.
Now, look at the coefficients here. We're looking for two numbers that mutliply to get -42 (2 times -21) and add to make 1.

Think of factors of 42. 7 times 6 is 42. 7 minus 6 is 1...your numbers are 7 and -6. Now all we have to do is split the middle and factor.

$3(2x^2+7x-6x-21)\n3(x(2x+7)-3(2x+7))\n\boxed{3(2x+7)(x-3)}$

it would be A. work the equation backwards. 3(2x+7)(x-3) * represents multiply
3*2x=6x
3*7=21 leaves you with (6x+21)(x-3)
follow FOIL: first outer inner last
F:6x*x=6x²
O:6x*-3=-18x
I:21*x=21x
L:21*-3=-63
6x² -18x+21x=3x -63
you would get 6x²+3x-63 so A is the answer

PLz help right answers only will give brainliest!!!!

Answers

Answer:

-48

Step-by-step explanation:

First You put The question in Order

HOPE THIS HELP

STAY SAFE:)

The answer for this question is D

3. The first car of the train, right behind the engine, contains 10 boxes. In each of the followingcars there are twice as many boxes as in the car in front of it.
How many boxes are there in the fifth car?
(A) 100
(B) 120
(C) 140
(D) 160
(E) 180

Answers

Answer:

10×2=20 second car

20×2=40 third car

40×2=80 fourth car

80×2=160 fifth car

Annabelle uses 15 cups of orange juice when she makes fruit punch. Each pitcher of punch contains 15/4 cups of orange juice. How many pitchers of punch does she make?

Answers

The answer is 4, be very careful it might be tricky, because you might not want to put in the guest so it's 4.

Answer:

See diagram below:

Step-by-step explanation:

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