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2 years ago

Solve the equation in two different ways. Choose one method of solving in detail 5x+7(x+1) = 5x - 21

Mathematics

1 answer:

frozen [14]2 years ago

6 0

Answer:

METHOD 1:

5x+7(x+1)=5x-21

5x+7x+7=5x-21

12x+7=5x-21

12x-5x=-21-7

7x=-28

x=28/7

x=4

METHOD 2:

5x+7(x+1)=5x-21

5x+7(x+1)=5x-21-5x

7(x+1)=-21

7x+7=-21

7x=-28

x=4

Step-by-step explanation:

METHOD 1:

5x+7(x+1)=5x-21

5x+7x+7=5x-21

12x+7=5x-21

12x-5x=-21-7

7x=-28

x=28/7

x=4

METHOD 2:

5x+7(x+1)=5x-21

5x+7(x+1)=5x-21-5x

7(x+1)=-21

7x+7=-21

7x=-28

x=4

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2 years ago

If the test is worth 50 and you score 84% how many questions did you get wrong? Write the proportion?

quester [9]

You got 8 questions wrong.

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2 years ago

Read 2 more answers

A small business assumes that the demand function for one of its new products can be modeled by p = Cekx. When p = $40, x = 1000

Maru [420]

Answer:

C= 82.1116

k=-0.0007192

Step-by-step explanation:

$p=Ce^{kx}\\40=Ce^{k1000}\\30=Ce^{k1400}\\$

Applying logarithmic properties yields in the following linear system:

$ln(40) = ln(C) + 1000k\\ln(30) = ln(C) + 1400k$

Solving for k:

$ln(40) = ln(C) + 1000k\\ln(30) = ln(C) + 1400k\\400 k = ln(30)-ln(40)\\k=-0.0007192$

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2 years ago

Is 2/5 equal to 0.4 please help me

igor_vitrenko [27]

1/5 is 2% or 0.2, therefor 2/5 is 4% or 0.4

8 0

2 years ago

Solve for t<br><br> - 7/4 = 2/5 (t)<br><br> t=

Lena [83]

-7/4:-1.75
2/5:0.4
-1.75=0.4t
-1.75/0.4=t
-4.375=t

Hope I helped you well, have a victorious day!

4 0

2 years ago