1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fittoniya [83]
2 years ago
14

PLEASE HELP I DO NOT UNDERSTAND!

Mathematics
2 answers:
andrew-mc [135]2 years ago
8 0

Answer:

1.) x = -3 2.) x = 4/3 3.) x = 698/77 or 9.1

Step-by-step explanation:

1.) 4 + 2x = -2

2x = -2 - 4

2x = -6

x = -3

2.) -1 (3x - 12) = 9x - 4

-(3x - 12) = 9x - 4

-3x + 12 = 9x - 4

-3x - 9x = -4 - 12

-12x = -16

x = 4/3

3.) x - 4 = 13 (6x - 54)

x - 4 = 78x - 702

x - 78x = -702 + 4

-77x = -698

x = 698/77 or 9.1

alexgriva [62]2 years ago
3 0

Answer:

1. x = -3

2. x = 4/3

3. x = 698/77

Step-by-step explanation:

4+2x=-2

-4       -4

2x= -6

/2     /2

x=-3

You have to get x alone on one side. Search up on yt "How to solve for x on two sides."

You might be interested in
Find the line of reflection if the image of (-5,-2) is each of the following?
just olya [345]

Answer:

the reflection would be (5,2)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Is this table proportional or non-proportional <br> X 8,16,24,32 <br> Y 2,4,6,8
Temka [501]
The table is Proportional
6 0
3 years ago
Round 954 to the nearest hundred
Alla [95]

Answer:

Step-by-step explanation:

1000

8 0
3 years ago
Read 2 more answers
The​ half-life of a certain tranquilizer in the bloodstream is 22 hours. How long will it take for the drug to decay to 90​% of
nasty-shy [4]

Answer:

It will take approximately 3.34 hours for the drug to decay to 90% of the original dosage

Step-by-step explanation:

As suggested, we use the formula for exponential decay:

A(t)=A_0\,e^{-k\,t}

From the given information, the half life of the drug in blood id 22 hours, so that means that it takes that number of hours to go from the initial value A_0, to a final value equal to A_0/2. Using this information we can find the decay rate "k" by solving for this parameter in the formula, and using the natural log function to bring the exponent down:

A(t)=A_0\,e^{-k\,t}\\\frac{A_0}{2} =A_0\,e^{-k\,*22}\\\frac{A_0}{A_0*2} =e^{-k\,*22}\\\frac{1}{2} =e^{-k\,*22}\\ln(\frac{1}{2})=-k\,*22\\ k=-\frac{ln(\frac{1}{2})}{22} \\k=0.0315

Now we use this value for the decay rate "k" to calculate how long it would take to decay to 90% of the original dose;

A(t)=A_0\,e^{-0.0315\,t}\\0.9*A_0} =A_0\,e^{-0.0315\,t}\\\frac{0.9*A_0}{A_0} =e^{-0.0315\,t}\\0.9 =e^{-0.0315\,t}\\ln(0.9)=-0.0315\,t\\ t=-\frac{ln(0.9)}{0.0315} \\t=3.3447\,hours

7 0
3 years ago
Y’all i need help on the last one
stira [4]

Answer:

Step-by-step explanation:

Kindly share the exact question

5 0
2 years ago
Read 2 more answers
Other questions:
  • If there is 32 pumpkin's and 5 need to be divided then what do u have​
    14·2 answers
  • Macky drank 6 bottles of water over 8 tennis practices. How much water did Macky drink each practice if she drank the same amoun
    9·1 answer
  • Which is equivalent to after it has been simplified completely? Assume n ≠ 0.<br> PICTURE BELOW
    9·2 answers
  • If two segments that intersect are perpendicular , what kind of angle do they form
    9·2 answers
  • Can someone please help me with question c? Would be really appreciated :)<br> (Picture is attached)
    10·2 answers
  • What is 1 2/3-(-5 2/3)?<br> PLEASE answer <br> 10 POINTS
    5·1 answer
  • On the same axes sketch andlabel graphs of lines with equations i ) y=8 ii​
    13·1 answer
  • Which data set has the smallest IQR
    5·1 answer
  • The temperature outside is 4F. The temperature drops 6F.
    10·1 answer
  • I NEED AN ANSWER ASAP\
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!