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Svet_ta [14]
3 years ago
5

Solve each of the following equations by the trial and error method : A) X- 7= -3 help some one now​

Mathematics
1 answer:
Vaselesa [24]3 years ago
8 0

Answer:

X - 7 = - 3

X = - 3 + 7

X = 4

the 7 turns positive because it was moved to the other side of the symbol "=" so we reverse the sign

- becomes +

and

+ becomes -

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Hmmm  18 because i said it is
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3 years ago
Kwan's parents bought a home for $50,000 in 1997 just as real estate values in the area started to rise quickly. Each year, thei
poizon [28]

A. First let us start with the linear model.

The equation is in the form of y = m x + b

Calculating for the slope m:

m = (309,587 – 50,000) / (2007 – 1997)

m = 25,958.7

 

Subsituting:

y = 25,958.7 x + b

Taking x = 1997, y = 50,000. Solve for b:

50,000 = 25,958.7 (1997) + b

b = -51,789,523.9

 

The complete equation is therefore:

y = 25,958.7 x - 51,789,523.9

 

 

B. The exponential model has the following form:

y = a b^x

where a and b are constants

 

Taking x1= 1997, y1 = 50,000; x2 = 2007, y2 = 309,587

50,000 = a b^1997

309,587 = a b^2007

 

Combining in terms of a:

50,000 / b^1997 = 309,587 / b^2007

b^2007 / b^1997 = 309,587 / 50,000

b^10 = 6.19174

b = 1.2

 

Substituting:

y = a 1.2^x

 

Solving for a:

50,000 = a 1.2^1997

a = 3.75 x 10^-154

 

The complete equation is:

y = 3.75 x 10^-154 * 1.2^x

3 0
3 years ago
Write an expression, using an exponent, that is equivalent to 8×8×8×8
zvonat [6]

Answer:

8 to the power of 4

Step-by-step explanation:

since their are four 8, (8x8x8x8) , you have to put that into an exponent

still need proof?

8x8x8x8=4096

8 to the power of 4 = 4096

so to conclude, 8 to the power of 4 is the same thing as saying 8x8x8x8, it is jsut the exponent version

5 0
3 years ago
If Rick buys a remote control car for $29.00, what is his selling price?
Ivahew [28]

Answer:

31

Step-by-step explanation:

31

4 0
3 years ago
To find the unit rate for $182
tino4ka555 [31]
Hey there <span>angelinarigole!

Question: 
</span><span>To find the unit rate for $182
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14feet

Answer:
</span><span>Divide both 182 and 14 by 14.

182</span>÷14=$13

14÷14=1

Hope this helps!

-Jayden
4 0
3 years ago
Read 2 more answers
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