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4 years ago

The solution of the equation 5-2x=-4x-7 is?

2 answers:

5 0

Change the subtraction to add 2x plus -4x
5=-4x (+2x)-7

5=-2x-7

since the x's are now on one side and we can't do anything with 5, on the other side you change -7 to add to the other side.

5 (+7)= -2x

12= -2x

divide -2 by 12.

-6 = x

Nana76 [90]4 years ago

3 0

-2x+4x=-7-5
2x=-12
X=-12/2
X=-6

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Vincent is calculating values for a direct variation which has a constant of variation of k=13.

vagabundo [1.1K]

Answer:

(9, 6) is incorrect

Step-by-step explanation:

It seem the constant of variation is k = 1/3.

<u>The equation is:</u>

y = kx or
y = 1/3x

<u>Let's verify the values in the table:</u>

1 = 3*1/3 ⇒ 1 = 1, correct
2 = 6*1/3 ⇒ 2 = 2, correct
6 = 9*1/3 ⇒ 6 = 3, incorrect
4 = 12*1/3 ⇒ 4 = 4, correct

4 0

3 years ago

Read 2 more answers

3/4 x - 1/2 - 4 = 12

hram777 [196]

Answer: x=22

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

Step 2: Add 9/2 to both sides.

Step 3: Multiply both sides by 4/3.

8 0

4 years ago

find the slope and y intercept for the following equation by writing it in the form y=mx+b -8x+y=5 someone help please

vichka [17]

Answer:

slope = 8, y- intercept = 5

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + b ( m is the slope and b the y- intercept )

Given

- 8x + y = 5 ( add 8x to both sides )

y = 8x + 5 ← in slope- intercept form

with slope m = 8 and y- intercept c = 5

8 0

3 years ago

Read 2 more answers

Como resolver y=1-2.5

oksian1 [2.3K]

I don't really speak Spanish but I'll guess that says

How do I solve y = 1 - 2.5

Unless I'm missing something, there's not even any algebra here.

The way we subtract a bigger number from a smaller number is first we subtract the smaller number from the bigger number the regular way, then we prepend a minus sign.

y = 1 - 2.5 = -(2.5 - 1) = -1.5

7 0

4 years ago

The access code for a cars security system consist of four digits the first digit cannot be 1 and the last digit must be odd how

Katena32 [7]

So we have 10 numbers 0 - 9
0 1 2 3 4 5 6 7 8 9
The first digit cannot be 1
therefore there are 9 possibilities
0 2 3 4 5 6 7 8 9

digits 2 and 3 can be numbers 0 through 9
therefore there are 10 possibilities for digits 2 and 3
digits 2 and 3 are a total of 2 digits
and the last digit must be odd so there are 5 possibilities -> 1 3 5 7 9
so
$9 * 10^2 * 5 => 9 * 100 * 5 => 45* 100 = 45,000$
codes available

6 0

3 years ago