10 minutes to answer Write an expression equivalent to 4 - (-7) help

1 answer:

4 0

11 because -7 subtracted by 4 add kore to the 7 so think of it this way -7 is a bad guy and 4 is a bad guy to because its a subtraction so if both bad guys combine you get 11 because a negative with negative makes a positive so its 11

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How many solutions does the equation (x-7)^2-27=37 have?

atroni [7]

Answer:

If we are solving for x it has<u> two answers</u> <u> 15,-1</u>

EXPLANATION:

first i take the root of both sides and then solve from there :

Step 1: Simplify both sides of the equation.

x2−14x+22=37

Step 2: Subtract 37 from both sides.

x2−14x+22−37=37−37

x2−14x−15=0

Step 3: Factor left side of equation.

(x+1)(x−15)=0

Step 4: Set factors equal to 0.

x+1=0 or x−15=0

x=−1 or x=15

HOPE THIS HELPS

x=−1 or x=15

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Identify the properties used in step 1 and step 2 to solve the equation shown 2x+6=22 then discuss why those properties were use

Jet001 [13]

Answer:

In step 1 subtraction property is used and in step 2 division property is used.

Explanation:

We have the equation 2x + 6 = 22

Step 1

The subtraction property of equality tells us that subtracting the same number to each side of an equation gives us an equivalent equation

So subtracting 6 from both sides

2x + 6 - 6 = 22 - 6

2x = 16

Step 2

The division property of equality tells us that you can divide each side of an equation with the same nonzero number to produce an equivalent equation

So dividing each side by 2.

$\frac{2x}{2} =\frac{16}{2} \\ \\ x=8$