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Aneli [31]
3 years ago
6

3x + 2y = 9

Mathematics
1 answer:
Mrrafil [7]3 years ago
3 0
You would plug it in, so where there is a y in the first equation you will plug in the second equation, so it would become 3x+2(x-3)=9 and then solve. First you would distribute and get 3x+2x-6=9, then combine like terms and get 5x-6=9, then add 6 to both sides and get 5x=15, then divide both sides by 5 and get x=3



The answer is x=3
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What is a postulate?
zloy xaker [14]

Answer:

A statement, also known as an axiom, which is taken to be true without proof. Postulates are the basic structure from which lemmas and theorems are derived.

Step-by-step explanation:

The Addition Postulate: If you have one apple and Sally has one apple, when you both add the same quantity to your existing number of apples, you'll still have the same number of apples. Using algebra, the postulate states:

If x = y, then x + 4 = y + 4

The Subtraction Postulate: If you have ten apples and Sally has ten apples, when you both subtract the same quantity of apples from your existing number of apples, you'll still have the same number of apples.

If x = y, then x - 3 = y - 3

Without being repetitive, these same principles apply to both multiplication and division.

The Multiplication Postulate: If x = y, then x * 3 = y * 3

The Division Postulate: If x = y, then x / 7 = y / 7

5 0
3 years ago
Read 2 more answers
ANSWER FAST PLS ILL MARK AS BRAINLIST write an expression that is equivalent to 3/4a + 2,3 - 1/2a -1/3 + 1/2a
maksim [4K]
6/8a+4,6-2/4a. I think that this is the answer.
3 0
3 years ago
Read 2 more answers
F(x) = (5x + 3)(x - 2)(x+2)
nlexa [21]

Answer: 15x^2+6x-20

Step-by-step explanation:

use symbolab.com for calculator and further steps

d/dx (5x+3)5

((x-2)(x+2))=2x

5(x-2)(x+2)+2x(5x+3)

15x^2=6x-20

8 0
3 years ago
(x1,y1) is (-4,-2) and (x2,y2) is (2,4)
olga nikolaevna [1]

Answer:

y = x+2

Step-by-step explanation:

(x1,y1) is (-4,-2) and (x2,y2) is (2,4)

Slope intercept form is y = mx+b

m = slope

b = add on

Slope = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Substitute numbers

Slope = \frac{4-(-2)}{2-(-4)}

Two negatives = one positive

Simplify

Slope = \frac{4+2}{2+4}=\frac{6}{6}=1

The slope is 1

We can substitute y, x, and the slope

4 = 2*1 + b

4 = 2+b

b = 2

Slope intercept form is y = mx+b

Answer is y = x+2

Hope this helps :)

6 0
3 years ago
Help .. A. 600, 0 B. 50, 350 C. 0, 500
Len [333]

Answer:

C.0, 500

Step-by-step explanation:

6 0
3 years ago
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