a tumor is injected with 0.2 grams of iodine-125, which has a decay rate of 1.15% per day. write an exponential model representing the number of grams f of iodine-125 remaining in the tumor after t days.

The value of the expression is 5x  + 3.14

The expression is given as

(3x + 2.05) + (-x + 1.09) + (2x) + (x)

Open the brackets

So, we have the following equation

(3x + 2.05) + (-x + 1.09) + (2x) + (x) = 3x + 2.05 - x + 1.09 + 2x + x

Collect the like terms

So, we have the following equation

(3x + 2.05) + (-x + 1.09) + (2x) + (x) = 3x - x + 2x + x  + 2.05 + 1.09

Evaluate the like terms

So, we have the following equation

(3x + 2.05) + (-x + 1.09) + (2x) + (x) = 5x  + 3.14

Hence, the value of the expression given as (3x + 2.05) + (-x + 1.09) + (2x) + (x) is 5x  + 3.14

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Possible question

What is (3x + 2.05) + (-x + 1.09) + (2x) + (x)

Answer:

209km/h

Step-by-step explanation:

4hrs 15mins was the time.

4hrs x 50km/h = 200km/h

15 percent of 60: how many minutes is in an hour, is 9.

Hence, The answer would be 209km/h.

Answer:

total earnings at 6th hour: 111

hourly wage (slope): 18.5

Step-by-step explanation:

A linear function has a linear relationship, which essentially states as x increases by one, the y-value increases by some constant amount yielding a straight line.

The slope, or how much the y-value changes as x changes by 1 is generally written as: [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

We can choose any two points and this should yield the slope of the function, but it's a lot easier to choose y-values that are only separated by an x-value of one.

Let's say: [tex](x_1, y_1)=(4,\ 74)\text{ and }(x_2,y_2)=(5,\ 92.50)[/tex]

If we plug the values into the slope formula we just get: [tex]\frac{92.50-74}{5-4}=\frac{92.50-74}{1}=92.50-74[/tex]

And this makes sense, since by definition of a slope, it's just the change in y over change in x. This is equivalent to how much the y-value changes as x increases by one, so if we select two values with a difference of one in their x-values, the slope just turns out to be the difference between the two numbers.

Simplifying our expression we get: [tex]92.50-74=18.5[/tex]

This slope in this context represents how earnings increases as the hour increases, or in other words the hourly wage.

To calculate the earnings of the 6th hour we can just use the definition of a slope. From the x-value 5 to the x-value 6, the y-value should simply increase 18.5

So adding 18.5 to the y-value at x=5 we get: [tex]92.5+18.5=111[/tex]

Answer: pretty sure its B

hope this helps :)

Answer:

System of linear inequalities is x - y + 1 < 0 and x + 2y +6 < 0

Step-by-step explanation:

Given:

To Find:

Formula used:

According to question, we have

Inequality for dotted line :

(y-1) > (0-1)/(-1-0) * (x-0)

y - 1 > x

x - y + 1 < 0...(1)

Inequality for solid line:

(y-(-3)) < (0-(-3))/(-6-0) * (x-0)

y + 3 < -x/2

x + 2y +6 < 0...(2)

Using (1) and (2), we get

System of linear inequalities is x - y + 1 < 0 and x + 2y +6 < 0.

The polynomial function, x² + 7 is prime

What is a polynomial?

A polynomial is an expression in mathematics that consists of indeterminates (also known as variables) and coefficients and includes only the operations of addition, subtraction, multiplication, and positive-integer powers of variables. x² + 4x + 7 is an example of a polynomial with a single indeterminate x. In three variables, consider x³ + 2xyz² - yz + 1.

The polynomial function, x² + 7 is prime.

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Answer:

85x10.5%=8.925

Step-by-step explanation:

A graph of the linear equation (3x + 2y = 6) in standard form is shown in the image attached below.

A graph can be defined as a type of chart that's commonly used to graphically represent data on both the horizontal and vertical lines of a cartesian coordinate, which are the x-axis and y-axis.

In Mathematics, the graph of any proportional relationship such as a linear equation is characterized by a straight line as shown in the image attached below.

Next, we would rewrite the linear equation in standard form as follows:

3x + 2y = 6

2y = 3x + 6

Dividing all through by 2, we have:

2y/2 = 3x/2 + 6/2

y = 3x/2 + 3

In conclusion, a graph which represents the linear equation (y = 3x/2 + 3) shows a proportional relationship between the value of x and y.

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Answer:

divide it in half it would be 339.878

Step-by-step explanation:

radius is half of a diameter

Hello

By definition:

 ⇒ the diameter of a circle is twice the length of the radius of the circle

Thus if the diameter is 679.756:

   [tex]\text{radius} = \dfrac{679.756}{2} = 339.878[/tex]

Hope that helps!

At a speed of 10 mph below the freeway traffic one should enter the expressway.

The speed of an object, also known as v in kinematics, is a scalar quantity that depends on the magnitude of the change in that object's position over time or the magnitude of the change in that object's position per unit of time.

Now of the given options since the respective speeds on various expressways are different it is tangible than to enter an expressway one must use less speed than the speed of the traffic on the expressway.

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Answer:

Step-by-step explanation:

The correct statement is all negative number are to the left of zero on a number line.

When you look at a number line you will see negative numbers, 0, then positive numbers ( -# ------- 0 -------- +#), you an see the negative numbers are on the left.

Answer:

a = $125.36, b = $729.35, c = $49.53, d =$500, f =$3.50, p =$1,450, and w =

$60

Step-by-step explanation:

Answer:

r>9

Step-by-step explanation:

3r-13+13>14+13

3r>27

3r/3>27/3

r>9

Answer:

r > 9

Step-by-step explanation:

Hello!

Treat inequality as an equal sign. The only rule is that when you divide or multiply by a negative number, flip the sign.

The solution is true for any value of r greater than 9.

Answer: A straight line can be drawn through all the points, and the line passes through the origin.

Step-by-step explanation:

Using relations in a right triangle and the Pythagorean Theorem, it is found that the missing side lengths are as follows:

There are three relations in a right triangle, given as follows:

For this problem, we have that:

tan(A) = b/a.

Hence:

5/12 = 6/a

Applying cross multiplication, the side a is found as follows:

5a = 72

a = 72/5

a = 14.4.

The Pythagorean Theorem relates the length of the legs [tex]l_1[/tex] and [tex]l_2[/tex] of a right triangle with the length of the hypotenuse h, stating that the hypotenuse squared is the sum of the legs squared, according to the following equation:

[tex]h^2 = l_1^2 + l_2^2[/tex]

Hence the hypotenuse c is given as follows:

c² = 5² + 14.4²

c = sqrt(5² + 14.4²)

c = 15.24.

For the triangle, we have that:

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Answer:

-11, -3

Step-by-step explanation:

[tex]n^2 + 14n+33=0 \\ \\ (n+11)(n+3)=0 \\ \\ n=-11, -3[/tex]

Using the numeric value of functions, it is found that the pole vaulter will run 50 feet farther in 2 seconds.

To find the numeric value of a function, we replace each instance of the variable by the desired value.

The formula for the velocity is given as;

v=8√h

where h is the height.

we have the height is of h = 9.8,

hence:

v = 8√(9.8) = 25 feet per second.

The holder was running at the rate of 25 feet per second.

Then, within two seconds, the distance is given as;

d = 25 x 2 = 50 feet.

Hence, The pole vaulter will run 50 feet farther in 2 seconds.

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We need to know about fraction to solve this problem. The amount Reshma spent on comic books is Rs 165 and the amount that is left with her is Rs 495.

We can solve this problem by calculating what 1/4th of 660 will be. In this question we know that Reshma spends 1/4th of her pocket money on comic books out of Rs 660. We can think of 660 being divided in 4 parts equally and that Reshma spends one part of it. The amount that will be left with Reshma is the rest three parts.

Reshma spends= 1/4x660=165

Amount left= 660-165=495

Therefore the amount Reshma spends on comic books is Rs 165 and the amount that is left with her is Rs 495.

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Answer:

x = 2, 4

Step-by-step explanation:

[tex](2x-4)^2=2x(x-2)+48 \\ \\ 4x^2 - 16x+16=2x^2-4x+48 \\ \\ 2x^2-12x-32=0 \\ \\ x^2-6x-8=0 \\ \\ (x-2)(x-4)=0 \\ \\ x=2, 4[/tex]

Answer:

t=n*c where t=total cost

Step-by-step explanation:

Answer:

Perpendicular lines: Are lines that intersect at right angles (90°)

Parallel lines: Are lines which have no point of intersection.

Step-by-step explanation:

[tex]{}[/tex]

The statement which is the most reasonable conclusion about the selling prices based on the graph is that: E. the value of maximum minus third quartile is less than the value of first quartile minus minimum.

A box and whisker plot is also referred to as boxplot and it can be defined as a type of graph that can be used to graphically represent the five-number summary of a data set with respect to locality, skewness, and spread. Also, the five-number summary include the following:

In Mathematics, the value of maximum minus third quartile (Max - Q₃) is generally less than value of first quartile minus minimum (Q₁ - Min). Mathematically, this can be represented by this expression:

Data value = (Max - Q₃) < (Q₁ - Min)

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Answer:

0.0131086142

Step-by-step explanation:

I just put in the calculator.

Answer:

480 cm³

Step-by-step explanation:

volume = width × heigh × length

volume = 10 cm × 8 cm × 6 cm

volume = 480 cm³

Hope it Help~

a) f is strictly increasing function then f is one to one

b) f: R-> R such that f(x) = x^n where n is even is not one to one

suppose that f is strictly increasing function

we have to prove that f is one to one

let us assume f(x1) = f(x2)

we have to prove x1=x2

since f is strictly increasing function

then x2>x1 and x1> x2

this implies that x1=x2

and Hence f is one to one function

b) f:R->R such that f(x) = x^ n where n is even is not one to one

because f(1)= f( -1)

but -1 is not equal to 1 therefore f is not one to one function

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When written as a biconditional statement, the definition becomes D. A state is Alaska if and only if it is the biggest state in the United States of America.

When writing a biconditional statement, you are to combine the statement in question, with the converse of the same equation and then join them by using the words, "if and only if."

This kind of statement lets it be known that if the first statement is correct, then the second definition or statement is correct as well. The biconditional definition here is that a state can only be Alaska if and only if that state is the largest in the country.

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y = (x - 1)² - 10 is the vertex form of the equation y = x² - 2x - 9.

Given, y = x² - 2x - 9

The equation is already in standard form : y = ax² + bx + c

where a=1, b=-2 and c=-9 according to the equation y = x² - 2x - 9.

The vertex form of parabola is: y = a (x - h)² + k

The "a" in y = ax² + bx + c equation  and the "a" in equation y = a (x - h)² + k are the same attributes of a parabola, therefore, substitute 1 for "a" in equation y = a (x - h)² + k: y = (x - h)² + k.

"h" is the x coordinate of the axis of the vertex: h = [tex]\frac{-b}{2a}[/tex]

Substitute in the values: h = - ( -2 ) ÷ 2(1)

∴ h = 1

Then, Substitute the value of h into the y = (x - h)² + k.

y = (x - 1)² + k.

Using the coordinates x and y from the above equations,

k = 1² - 2(1) - 9

k = 10

Now, Substitute the value of k into the equation y = (x - 1)² + k.

y = (x - 1)² - 10.

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Let

y ----> total charge in a month

x ----> number of minutes

so

Plan A

y=0.21x+11

Plan B

y=0.10x+20

Equate both equations

0.21x+11=0.10x+20

solve for x

0.21x-0.10x=20-11

0.11x=9

x=9/0.11

x=81.82 minutes

Convert to hours and minutes

81.82 minutes=60+21.82=1 hour 22 min

therefore

The complete expression that fills the blank is -5^2 = 0 - 5^2

These are any statements that use variables, operators and coefficients as its representation

The expression is given as

-5^2 = __-5^2

Represent the blank with x

So, we have the following expression

-5^2 = x - 5^2

Add 5^2 to both sides of the equation

So, we have

x = 5^2 - 5^2

Evaluate the difference

x = 0

This implies that -5^2 = __-5^2 gives -5^2 = 0 - 5^2

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