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Roman55 [17]
3 years ago
11

Explain in words how you would get the answer to this equation 9x-7=-7=0

Mathematics
1 answer:
goblinko [34]3 years ago
4 0

Answer:

See below

Step-by-step explanation:

9x-7=0

We want to isolate the variable, or in other words, get x alone.

The first step is to add 7 to each side to get the constant on one side and the variable on the other

9x-7+7 = 0+7

9x =7

The since we are multiplying x by 9, we need to do the opposite to isolate it.  We will divide by 9.  What we do to one side, we do to the other.  Divide both sides by 9

9x/9 = 7/9

x =9

We have successfully isolated the variable and solved for x.

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Cindy is buying a new car and wants to learn how the value of her car will change over time. Insurance actuaries predict the fut
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Answer:

C=10000(0.852)^t

Step-by-step explanation:

Let the exponential function be,

C=a(b)^t

Here, C = cost of the car

t = Duration or period in years

From the given table,

Two points representing cost of the car and time are (10000, 0) and (8520, 1),

For (10000, 0),

10000=a(b)^0

a = 10000

For (8520, 1)

8520 = 10000(b)^1

b=\frac{8520}{10000}

b = 0.8520

Therefore, exponential equation will be,

C=10000(0.852)^t

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3 years ago
What is the area?<br> 4 m<br> 7 m<br> 8 m
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Answer:

224

Step-by-step explanation:

Multiply all the numbers

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(4x-5)^3 - (x^2 + 4x+1)(4x-3)=?
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Answer:

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Step-by-step explanation:

8 0
3 years ago
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A ___ is an algebraic relationship in which one quantity ___ on another.
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Answer:

inequality

Step-by-step explanation:

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Answer ? And explain how to solve please
statuscvo [17]
Let's solve your equation step-by-step.
39−2(x−8)=56
Step 1: Simplify both sides of the equation.
39−2(x−8)=56
39+(−2)(x)+(−2)(−8)=56(Distribute)
39+−2x+16=56
(−2x)+(39+16)=56(Combine Like Terms)
−2x+55=56
−2x+55=56
Step 2: Subtract 55 from both sides.
−2x+55−55=56−55
−2x=1
Step 3: Divide both sides by -2.
−2x
−2
=
1
−2
x=
−1
2
5 0
3 years ago
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