Question 7 (1 point)
7x – 1 = 4x + 5
X=
PLEASE HELP IM GONNA FAIL

Answer:

There will be less than 1 gram of the radioactive substance remaining by the elapsing of 118 days

Step-by-step explanation:

The given parameters are;

The half life of the radioactive substance = 45 days

The mass of the substance initially present = 6.2 grams

The expression for evaluating the half life is given as follows;

[tex]N(t) = N_0 \left (\dfrac{1}{2} \right )^{\dfrac{t}{t_{1/2}}[/tex]

Where;

N(t) = The amount of the substance left after a given time period = 1 gram

N₀ = The initial amount of the radioactive substance = 6.2 grams

[tex]t_{1/2}[/tex] = The half life of the radioactive substance = 45 days

Substituting the values gives;

[tex]1 = 6.2 \left (\dfrac{1}{2} \right )^{\dfrac{t}{45}[/tex]

[tex]\dfrac{1}{6.2} = \left (\dfrac{1}{2} \right )^{\dfrac{t}{45}[/tex]

[tex]ln\left (\dfrac{1}{6.2} \right ) = {\dfrac{t}{45} \times ln \left (\dfrac{1}{2} \right )[/tex]

[tex]t = 45 \times \dfrac{ln\left (\dfrac{1}{6.2} \right ) }{ln \left (\dfrac{1}{2} \right )} \approx 118.45 \ days[/tex]

The time that it takes for the mass of the radioactive substance to remain 1 g ≈ 118.45 days

Therefore, there will be less than 1 gram of the radioactive substance remaining by the elapsing of 118 days.

Answer:

positive

Step-by-step explanation:

because don't have the "-"

Answer:

positive

Step-by-step explanation:

0.912+134.1= 135.012

Answer:

16/12  or 4/3

Math

$417.50 should be the correct answer you just multiply  the $7.25 to 30 and then add the $200.

Answer:

$417.50

Step-by-step explanation:

To calculate the total cost you will need to use this equation: 200 + 7.25n. n represents the number of people renting the course. 200 is the initial cost and then you add it with the cost of 30 people.

okay so it says Sophia's friend has saved $118 so she already knows she has $118 and then the next step is to figure out about Part B so she does not know how many songs you can afford to buy so the expression in Part B whatever the expression is if you figured out the answer to Part B and there's a number what you want to do what you would want to divide that number into 118 to see how how many equal groups you can make and you don't want to go overboard 18 so what you would want to do it if you would want to do if you figure out the number to expression be in the boring part B they don't want to take that and keep making a go go to that until you reach 118 and then you would get your total

Answer:

b

Step-by-step explanation:

Answer: the 1st one; Andre

Step-by-step explanation: I just took the test

Answer:

I think Linear but i am not sure

Step-by-step explanation:

A linear function is a function with standard form y = mx + b, where m is the slope and b is the y-intercept, and whose graph looks like a straight line. There are other functions whose graph is not a straight line. These functions are known as nonlinear functions and they come in many different forms.

Answer:

Dan paid $80 for his luggage

Step-by-step explanation:

$400

-$320

= $80

Jake wants to go to a lil uzi vert concert. A lil uzi vert concert ticket cost $320. The backstage pass is only $400, so Jake pays for that instead. He later figured out that he wanted to lose 50 pounds before the concert in 6 months and for every time he goes to the gym he has to pay $10 he only goes to the gym 8 times and his bank account has $500 on it. How much money did he have left over after going to the gym 8 times? - PS don't worry about this question its just a fake scenario i made for the second part of your question hope this helps!!!

Answer:

Step-by-step explanation:

Let adult tickets be a and children tickets be c.

System of equations as per given:

Substituting c in the second equation

Then, finding c:

Answer:

Answer:

20 cakes

Step-by-step explanation:

Given

28 cakes in 7 days

Required

Determine the number of cakes in 5 days

Represent the required with x. The question illustrates proportionality.

First, we need to represent the given and required as a ratio

[tex]28 : 7 = x : 5[/tex]

Convert ratios to fraction

[tex]\frac{28}{7} = \frac{x}{5}[/tex]

[tex]4 = \frac{x}{5}[/tex]

Solve for x

[tex]x = 4 * 5[/tex]

[tex]x = 20[/tex]

Answer:

I think y=3

Step-by-step explanation:

Answer:

Step-by-step explanation:

Y=3

Answer:

B

Step-by-step explanation:

B

The two of the possible solutions to the equation sin(5x - π) = (√2)/2 are,

⇒ (π/4, 7π/4).

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Here, The given equation is;

sin(5x - π) = (√2)/2

Now, We can write 2 as √2 × √2

So, We get;

sin(5x - π) = √2/√2*√2

sin(5x - π) = 1/√2

Taking sin⁻¹ on both side,

sin⁻¹ (sin(5x - π)) = sin⁻¹ (1/√2)

5x - π = sin⁻¹ (1/√2)

Hence, From the trigonometry table we know that sin⁻¹ (1/√2) = π/4

Thus,

5x - π = π/4

5x = π + π/4

5x = 5/4π

Divide by 5 on both side, we get

x = π/4

Now, since x < 2π, then it means it is in the fourth quadrant. Thus;

x = 7π/4

So, the two of the possible solutions to the equation sin(5x - π) = (√2)/2 is (π/4, 7π/4).

To learn more about trigonometry table link is here

brainly.com/question/20596286

#SPJ3

Answer:

x = 43 1/3 degrees

Step-by-step explanation:

sum of interior angles in a triangle = 180 degrees

30 + (3x - 9) + 29 = 180

30 + 29 + (3x - 9) = 180

59 + (3x - 9) = 180

(3x - 9) = 180 - 59

(3x - 9) = 121

3x = 121 + 9

3x = 130

x = 43 1/3

Answer:

30%

Step-by-step explanation:

I apologize if I am incorrect

Answer:

70%

Step-by-step explanation:

set up an equation for the word problem that looks like this: 50x = 35

and solve by dividing both sides by 35

50x ÷ 50 = x

35 ÷ 50 = .7

.7 = 70%

x = 70%

Answer:

x = -6

Step-by-step explanation:

you want to solve the aswer so you wanna solve for whats in the parenthesis so your new equation should look like this:

8x + 48 = 3

you want to subtract 48 from both sides  your new equation should look like this:

8x = -45

now you want to get x by itself and your new equation should be:

x = -6

Answer:

A, B, D, F, J

Step-by-step explanation:

Answer:

Step-by-step explanation:

1. place food away from the ranch

2. Throw stuff at it

3. Save your animals!

Answer:     if it is killing your animals id say shoot it but there scared of people so just like walk around where you see it the most

Step-by-step explanation:

i hope this helps my grandpa has cows and he normally just keeps a gun with him

Answer:

c. 7 candies and 9 nuts

Step-by-step explanation:

c.. 7 and 9

Answer:

c

Step-by-step explanation:

because 9x10 is acually 21 because because 9 goes into  twenty 2 times. and 2 times 5 is ten and ten times 2 is twenty and the extra one from the 9 add it to twenty any you get twenty one periott

Answer:

The system of equations is

 and  

Fred's age is 36 years old and Nathan's age is 9 years old

Step-by-step explanation:

Let

f -----> Fred's age

n ----> Nathan's age

we know that

-----> equation A

----> equation B

equate the equations and solve for n

Find the value of f

therefore

Fred's age is 36 years old and Nathan's age is 9 years old

Answer:

100

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

it is the first and least number/factor of 18 and 128

Answer:

11.02

Step-by-step explanation:

Remember to multiply the markdown and origin price and then sub what you get from the original price to get an answer. Goodluck

Answer:

$11.02

Step-by-step explanation:

1. Take the original price and multiply it by 33%.

16.45 * 0.33 = 5.4285

2. Round 5.4285 to two decimal places

5.43

3. Take your discount and subtract it from the original price.

$16.45 - $5.43 = $11.02

If you need to paint your house, you estimate how much paint you will need. Like 4 gallons or whatever.

Answer: 500 adults tickets were sold

Step-by-step explanation: So you can do 563 subtract 63 to get the answer of 500

Answer:

i think it's 1

Step-by-step explanation:

Answer: I think it is 4

Step-by-step explanation: