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kifflom [539]
2 years ago
13

Solve the system of equations 3x + y = 3 and 7x + 2y = 1.

Mathematics
1 answer:
vodka [1.7K]2 years ago
4 0

Answer:

  (x, y) = (-5, 18)

Step-by-step explanation:

You have done the first two steps.

<h3>3.</h3>

  7x +2(3 -3x) = 1 . . . . . equation with y substituted

  7x +6 -6x = 1 . . . . . . . eliminate parentheses using the distributive property

  x = -5 . . . . . . . . . . . . . subtract 6 from both sides, collect terms

<h3>4.</h3>

  y = 3 -3(-5) . . . . . . . . use the substitution equation to find y

  y = 18

The solution is (x, y) = (-5, 18).

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Factor completely 4x4 − 24x3 + 36x2.
ipn [44]

The previous answer from another person got deleted, so I'm here to put it back in my own words.

(Edit: The answer is A)

First of all, you can take 4 out of each, so simplify everything by 4.

4(x^4 - 6x^3 + 9x^2)

Next, you can see that you're able to take out x^2

4x^2(x^2 - 6x + 9)

You can see that both x^2 and 9 are perfect squares, meaning you can crunch them together like this

(x+3)^2 or (x-3)^2

Of course, only one would work, and as fate has it, (x-3)^ produces x^2 - 6x + 9

This would turn the now factored equation into :

4x^2(x-3)^2 or 4x^2(x-3)(x-3), this means the answer is A

6 0
3 years ago
The sum of three consecutive even numbers 86. Select all the equations below that represent this situation.
Elena-2011 [213]
Answer:
A = X+X+2+X+4=3X+6 =(X+1)+(X+2)+(X+3)
B = 3X+6 =(X+1)+(X+2)+(X+3)
C = not (3X+3)
D = not (3X+3)
3 0
2 years ago
I need help solving this: Solve: 6 = 2m + 14
masha68 [24]
Take the like terms on one side:

2m=6-14

2m = 8

m= 8/2

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7 0
2 years ago
Read 2 more answers
During the month of febuary fabulous feet shoe mart sold 48 pairs of red loafers. After an ad campaign to boost sales they sold
frutty [35]
The percent of increase in sales.
(60-48)/48)*100=25%
7 0
3 years ago
Check For Understanding
adelina 88 [10]

Answer:

Distance between A ----> B : 2 cm

B ---> C: 3 cm : 600 meters

A----> C: 4 cm

3:600 meters scaled

So its 200 meters per every 1 cm!

From A to B : 400 meters

From B to C : 600 meters

Frok C to A: 800 meters

Therefore we sum 400+600+800= 1800 meters

8 0
3 years ago
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