Chauncey is studying a 250-mg sample of a radioasubstance has a half-life of 5 days. Write an equatsubstance, s, is left after n days?aS =b= 250 (3)s = 250 (3)s = 250 (0.5)s = 250 (0.5)$5nd

Answer:

is not correct because the lcm will be 16 and u will get 21/16

done

The opposite angles of a parallelogram are equal, therefore:

Opposite sides of a parallelogram are parallel and equal so:

∠TSQ and ∠RQS are alternate interior angles, therefore:

First answer:

Second Answer:

The coordinates of the Y'' after reflection of poligon X'Y'Z' over the x axis: (-2, -4)

Let's assum that each person drives 120 miles per week.

Then for person A we have:

for person B we have:

finally, for person C:

Then, if person A changes to person B's car, we have that the save is:

if person B buys person C's car, then the save is:

therefore, the savings on gas will be different for both of them and person C is incorrect.

2)Since person A saved 2 gallons, then the new car for Person C must save 2 gallons for each mile traveled.

Then we have the following equation:

where 'x' represents the number of gallons consumed in 120 miles. then, solving for x we have:

therefore, person C will need to buy a car that uses 1 gallon for eah 120 miles traveled

we have the inequality

5y – 2x ≤ 9

Remember that

If an ordered pair is a solution to the inequality, then the ordered pair must satisfy the inequality

so

Verify each ordered pair

1) (–3, 1/5)

substitute in the given inequality

5(1/5) – 2(-3)x ≤ 9

1+6 ≤ 9

7 ≤ 9 -----> is true

that means ----> the ordered pair is a solution

2) (5, –17.6)

5(-17.6) – 2(5) ≤ 9

-88-10 ≤ 9 ------> is true

that means ----> the ordered pair is a solution

3) (0, 2)

5(2) – 2(0) ≤ 9

10 ≤ 9 -----> is not true

The ordered pair is not a solution

therefore

The answer is

ANSWER

EXPLANATION

We have that line AB is translated in a plane to form line A'B'.

When a line/figure is translated, its shape and size do not change, which means that the distance between corresponding points on the pre-image and image must remain the same.

In other words, the distance between A and A' must be equal to the distance between B and B'.

Therefore, the correct answer is:

We have that the 40 chocolate bars that Nathaniel had is the 100%. Then, to find out how many chocolate bars he ate, we have to multiply 40 by 75%:

therefore, Nathaniel ate 30 chocolate bars,

Triangle ABC with coordinates A (3, 4), B (7,7), and C (8, 1) is translated 6 units left and 7 units down.

we have that

the rule of the translation is

(x,y) -------> (x-6, y-7)

Applying the rule to the coordinates of triangle ABC

A(3,4) ------> A'(3-6,4-7)

A'(-3,-3)

B(7,7) ------> B'(7-6, 7-7)

B'(1,0)

C(8,1) --------> C'(8-6,1-7)

C'(2,-6)

Explanation

We are given the following:

We are required to determine the value of cos 16° from the diagram given.

We know that according to the trigonometry ratio rules:

So, we have:

Hence, the answer is:

The circumference of a circle is given by the formula

however we also knos that the diameter can be written as

meaning that the formula for the circumference can also be written as

then the circumference for the given information is:

In order to find the geographic mean between each of this pair of numbers, first we would have to define what is the geographic mean.

The geographic mean is the average of a set of numbers.

Therefore, the geographic mean for A. 28 and 14 would be:

Geographic mean (28,14)= (28*14)^0.5

=(392)^0.5=19.798990

The geographic mean for B. 7 and 36 would be:

Geographic mean (7,36)=(7*36)^0.5

=(252)^0.5=15.874508

So, Geographic mean for (28,14) would be 19.798990 and for (7,36) would be 15.874508

We know that the rate of change is a rate that describes how one quantity changes in relation to another quantity. If x is the independent variable and y is the dependent variable, then

where (X1,Y1) and (X2,Y2) are points of our model.

So, in this case we have that:

So, the correct answer is: the rate of change for the sales tax is $0.08 per dollar.

Answer:

Step-by-step explanation: it is that

26 gallons

1) We can write this information setting up a proportion

miles gallons

120 10

312 x

2) Assuming the pace hasn't changed, then we can consider that as proportional:

120x = 312 * 10

120x= 3120

x = 3120/120

x =26

3) So 26 gallons are going to be needed for those 312 miles.

While completing the race, Ned spent 63 min walking if the ratio of time walking to jogging was 9:1, how many minutes did he spend completing the race?

Let

x-----> time spent walking

y -----> tiime spent jogging

we have

x/y=9/1

x=9y -----> equation A

we have

x=63 min

substitute in the equation A

63=9y

solve for y

y=7 minutes

therefore

teh answer is

The given data set is 21,31,26,24,28,26.

Arranging the data set in the ascending order,

21,24,26,26,28,31.

The data set contains 6 numbers,

The median can be determined by taking the average of 3rd and 4th term of the data set,

Thus, the required median is 26.

The range can be determined by taking the difference between the highest and the lowest value of the data set,

Thus, the range of the data set is 10.

The interquartile range of the data set can be determined by taking the difference of quartile 1 and quartile 3.

Thus, the required interquartile range is 4.

Note that 10 dimes = $1

Also 4 quarters = $1

That means, 100 dimes equals $10

Also, 44 quarters =

Answer:

595

Explanation:

The given expression is:

First, we can rewrite 35! , so the expression is equal to:

Finally, we can simplify to get:

Therefore, the expression is equal to 595

A quotient is the result of the division of two numbers. The given numbers are 23.7 and 0.8. Thus,

Quotient = 23.7/0.8

Quotient = 29.625

Answer:

x = 33

Step-by-step explanation:

Creating an equation

The angles shown are corresponding angles

Corresponding angles are angles that occupy the same position and are on the same side of the transversal. For a better sense of this, kindly review the attached image.

Corresponding angles are congruent ( equal to each other )

This means that 124 = 4x - 8

Solving for x

124 = 4x - 8

==> add 8 to both sides

132 = 4x

==> divide both sides by 4

33 = x

If the plane is parallel to the base, then the cross section has the same shape of the base: a penthagon.

Input data

Points

(2, 8)

(20, 18)

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

First, let's find what m is, the slope of the line...

The equation of the line that passes through the points. For this case we can use the linear model given:

predict the hourly pay rate for a cashier with 14

(a) y = 0.55x+6.8

(b) 14.5 dollars per hour

The form of the linear equation is

m is the slope

b is the y-intercept

The given equation is

Compare it with the form above to find m and b

Since the coefficient of x is -2, then

m = -2

Since m is the slope of the line, then

The slope of the line is -2

The answer is B

Answer:

x = -2

Step-by-step explanation:

Divide both sides by the coefficient of x, which is -6

= -6x/-6 = 12/-6

x = -2

Answer:

C. 39 feet

Step-by-step explanation:

[tex]{ \tt{h(t) = - 16 {t}^{2} + 48t + 3 }}[/tex]

- Let us find the limits of the function

[tex] { \tt{ \frac{d \{h(t) \}}{dt} = - 32t + 48 }} \\ [/tex]

- So, let us differentiate for the second time;

[tex]{ \tt{ \frac{d {}^{2} \{h(t) \} }{dt {}^{2} } = - 32}} \\ [/tex]

- So, at maximum height; d{h(t)}/dt is 0;

[tex]{ \tt{ - 32t + 48 = 0}} \\ { \tt{ - 32t = - 48}} \\ { \tt{t = 1.5 \: seconds}}[/tex]

- Therefore; maximum height is;

[tex]{ \tt{h(t) = - {16t}^{2} + 48t + 3}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ { \tt{h(1.5) = - 16(1.5) {}^{2} + 48(1.5) + 3}} \\ { \tt{h(1.5) = - 36 + 72 + 3}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ { \tt{h(1.5) = 39 \: feet}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]

We will have the following:

We first determine the missing side of the triangle:

Now, we determine the expressions:

Looking at the triangles, we see that they have two congruent sides, and the angles between them are congruent too.

Then, the two triangles are related by side-angle-side (SAS), so the triangles are congruent (SAS theorem).

We will have:

The fraction is approximately 11.

• What are you being asked to find? define your variables

We are being asked to find the number of goats and ducks that there might be in the farmhouse.

• What are you given?

•

From the information given by the question, we know that there are as many as 12 animals and that they have as many as 34 legs.

• Create & solve a system

from the given information we can write two expressions, one for the total number of animals, which equals 12, and another for the number of legs, let's call x to the number of goats and y to the number of ducks.

We know that there are a total of 12 animals, this is the number of goats plus the number of ducks, then we can write the expression:

goats + ducks = 12

x + y = 12

0.

And we know that there are 34 legs since a duck has 2 legs and a goat has 4, the number of legs of all the ducks would be the number of ducks times 2 and the number of legs of all the goats is 4 times the number of goats, then we can express the equation:

goat's legs + duck's legs = 34

4x + 2y = 34

Then, the system of equations that we have to solve is:

1. x + y = 12

2. 4x + 2y = 34

Now let's solve the system of equations, by following these steps:

Solve for y from the first equation:

x+y=12

x-x+y=12-x

y=12-x

Replace the expression y=12-x into the second equation and find the value of x.

4x + 2y = 34

4x+2(12-x)=34

4x+2*12-2x=34

4x+24-2x=34

2x+24=34

2x+24-24=34-24

2x=10

2x/2=10/2

x=5

Now that we know that x equals 5, let's replace it into the expression y=12-x, to find the value of y:

y=12-x

y=12-5=7

Then, x equals 5 and y equals 7

• Explain your solution

•

In the farmhouse could there be a total of 5 ducks and 7 goats