10÷(−2)=?10, divided by, left parenthesis, minus, 2, right parenthesis, equals, question mark

Answer: 9z + 2

Step-by-step explanation: you have to add and subtract everything in the equation.

A person living in a Midwestern city who drinks two liters of tap water containing 150 mg Ca/L would receive approximately 20% of their recommended daily requirement (RDA) of calcium.

The recommended daily requirement of calcium is 1000 mg, and the tap water in the Midwestern city contains approximately 150 mg of calcium per liter. If a person drinks two liters of water in one day, they would consume a total of 300 mg of calcium (150 mg/L * 2 L). To determine the percentage of their RDA, we can divide the amount of calcium obtained from the water (300 mg) by the recommended daily requirement (1000 mg) and multiply by 100.

Mathematically, it would be (300 mg / 1000 mg) * 100 = 0.3 * 100 = 30%. Therefore, a person living in the Midwestern city who drinks two liters of tap water would receive approximately 30% of their RDA of calcium. This means that drinking tap water alone would not fulfill their entire daily calcium requirement, and additional sources of calcium-rich foods or supplements may be necessary to meet their RDA.

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Answer:

Step-by-step explanation:

thats an allien ow may gad

Answer:

V≈471.24

or to the nearest tenth is

471.2

Answer:

471.2

Step-by-step explanation:

Answer:

v = - \(\frac{1}{2}\)

Step-by-step explanation:

Given

v = u + at ← substitute the given values for u, a, t

  = 1 + ( - 3 × \(\frac{1}{2}\) )

   = 1 + (- \(\frac{3}{2}\) )

   = 1 - \(\frac{3}{2}\)

    = \(\frac{2}{2}\) - \(\frac{3}{2}\)

    = - \(\frac{1}{2}\)

Answer:

Step 2 has error and step 4 has error.

Step-by-step explanation:

Here we can see that elimination method is  applied to solve the  system  of equations  for which -2 is multiplied both sides of equation first

-2(x+2y)=-2(10 which is correct

but in step 2

left side is -2x-4y and the right side is -10 which has to be -20 which makes this step wrong and this is the error made by student.

in Step 4 also ,value of the y has to be 5 but student plugged y =1 which is also error by student.

Correct solution is

   -2x-4y= -20

     2x+ 5y= 15

on adding ,we get

y = -5

plugging y =5 in equation x+2y= 10 ,we get x+2(-5) =10 ,we get x = 20

therefore (20,-5) is the  solution

Answer:

step 2

Step-by-step explanation:

The speed of the faster cyclist is 14\ miles/hr.

What is speed?

It is the average distance coverd in unit time. It is also defined as the rate of change of distance with respect to time.

Since the speed of the first cyclist is double than the second cyclist hence, the first cyclist will cover the double distance than the second cyclist. Consider the first cyclist covers 2s distance and first cyclist covers s distance. The sum of these two distances should be 42 miles. Hence,

\(2s+s=42\\3s=42\\s=14\)

Now, distance coverd by the first cyclist is \(2s=2\times 14\\=28 \ $miles\).

Now, both the cyclists meet after 2 hr hence, time taken by the first cyclist is 2 hr.

\(Speed=\frac{Total\ distance}{Total\ time}\\=28\ miles/2 \ hr\\=14\ miles/hr\)

Hence, the speed of the faster cyclist is 14\ miles/hr.

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Answer:

4 W

Step-by-step explanation:

Electrical power, P = I²R where I = current and R = resistance.

Given that I = 0.2 A and R = 100 Ω,

P = I²R

P = (0.2 A)² × 100 Ω

P = 0.04 A² × 100 Ω

P = 4 W

Safety data sheets (SDS) are not only required when there are 10 gallons. This statement is false. SDS, also known as material safety data sheets (MSDS), are required for hazardous substances, regardless of the quantity.

Safety data sheets provide detailed information about the potential hazards, handling, and emergency measures for substances. They are required under various regulations, such as the Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (HCS) in the United States.

The quantity of the substance does not determine the need for an SDS. For example, even if a small amount of a highly hazardous substance is present, an SDS is still necessary for safety reasons.

SDS help workers and emergency personnel understand the risks associated with a substance and how to handle it safely. It is essential to follow proper safety protocols and provide SDS for hazardous substances, regardless of the quantity.

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The cosine function, y = -30·cos(6·π·t/37), where y is the water level indicates is highest at the following four consecutive times;

6 ¹/₆ hours, 18.5 hours, 30⁵/₆ hours and 43 ¹/₆ hours

The cosine function is a trigonometric function, consisting of the cosine of an angle, which in a right triangle is the ratio of the length of the adjacent side to the side facing the angle

The possible equation in the question, obtained from a similar question on the internet is; y = -30·cos(6·π·t/37)

b. The independent variable, θ = 6·π·t/37

Whereby y is the water level, when the water level is the highest, we get;

cos(θ) = -1

The general solution for the above trigonometric equation is; θ = π + 2·π·n

θ = arccos(1) = π + 2·π·n, where n is an integer

Therefore, when n = 0, we get; 6·π·t/37 = π + 2 × π × 0 = π

6·π·t/37 = π

6·t/37 = 1

t = 37/6 = 6 1/6 hours

when n = 1, we get; 6·π·t/37 = π + 2 × π × 1 = 3·π

6·π·t/37 = 3·π

2·t/37 = 1

t = 37/2 = 18.5 hours

when n = 2, we get; 6·π·t/37 =  π + 2 × π × 2 = 5·π

6·π·t/37 = 5·π

t = 185/6 = 30 5/6 hours

when n = 3, we get; 6·π·t/37 = π + 2 × π × 3 = 7·π

6·π·t/37 = 7·π

t = 259/6 = 43 1/6 hours

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The area of circle Z is approximately 32.67 square centimeters, given that chord VX is 9 cm and arc XY measures 40 degrees.

To find the area of circle Z, we need to determine its radius.

Given that chord VX is equal to the radius of the circle, we can use the properties of a circle to find the radius.

In a circle, the perpendicular from the center to a chord bisects the chord. So, if we draw a line segment from the center of circle Z to chord VX, it will bisect VX into two equal parts. Let's call the point of intersection with VX as point M.

Since chord VX is equal to 9 cm, we can determine that MV (half of VX) is equal to 9/2 cm = 4.5 cm.

Next, we are given that arc XY measures 40 degrees. We can use the relationship between the central angle, the radius, and the arc length of a circle to find the radius.

The formula to calculate the arc length is:

Arc length = (Central angle / 360) * 2πr

We know that arc XY measures 40 degrees, so the arc length is given by:

40/360 * 2πr = 4πr/9

Since arc XY is equal to the distance from point X to point Y along the circumference of circle Z, we can equate it to 4πr/9.

4πr/9 = 4.5 cm

Now, we can solve this equation to find the radius of circle Z:

4πr = 4.5 * 9

4πr = 40.5

r = 40.5 / (4π)

r ≈ 3.22 cm (rounded to two decimal places)

Now that we have the radius of circle Z, we can calculate its area using the formula

Area = πr²

Area = π * (3.22 cm)²

Area ≈ 32.67 cm² (rounded to two decimal places)

Therefore, the area of circle Z is approximately 32.67 square centimeters.

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--The given question is incomplete, the complete question is given below "  A chord of a circle is equal to the radius of the circle. if chord vx = 9 cm and arc xy = 40 degrees, what is the area of circle z? "--

The covariance matrix of Y is given by

Cov (Y) =  

      [[1, 1, 0],

       [1, 2, 1],

       [0, 1, 2]]

The joint PDF of Y can be obtained as

fY(y1,y2,y3) = (1/√(2π))^3  * exp ( -1/2 * [y1^2 + y2^2 + y3^2 - 2y1y2 - 4y2y3 - 2y1y3])

The joint PDFs of Yi and Y2, Yi and Y3 and Y2 and Y3 are given by:

fY1Y2(y1,y2) = (1/√(2π))^2 * exp(-1/2 * (y1^2 + y2^2 - 2y1y2))

fY1Y3(y1,y3) = (1/√(2π))^2 * exp(-1/2 * (y1^2 + y3^2 - 2y1y3 - 4y2y3))

fY2Y3(y2,y3) = (1/√(2π))^2 * exp(-1/2 * (y2^2 + y3^2 - 4y2y3))

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Answer:

10 days

Step-by-step explanation:

Per day, he is able to harvest 1/10 = 10% of his crop. How long it takes to harvest 100%?

1 day - 10%

x days - 100%

10x = 100

x = 100/10

x = 10

10 days

Here it is

.,.,.,.,..,.,.,.

P = 90 is the solution for the given equation.

Given: Qd=95−4

PQs=5+P

To find Qd if P=5:

Put P = 5 in the equation

Qd=95−4P

Qd = 95 - 4 x 5

Qd = 75

So, Qd = 75.

To find P if Qs = 20:

Put Qs = 20 in the equation

Qs = 5 + PP

= Qs - 5P

= 20 - 5P

= 15

So, P = 15.

To solve Qd=Qs, substitute Qd and Qs with their respective values.

Qd = Qs

95 - 4P = 5 + P

Subtract P from both sides.

95 - 4P - P = 5

Add 4P to both sides.

95 - P = 5

Subtract 95 from both sides.

- P = - 90

Divide both sides by - 1.

P = 90

Thus, P = 90 is the solution for the given equation.

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Answer:

2/1 or 2

Step-by-step explanation:

so first, you have to count the rise/run. This line rises up 2 and runs to the right 1. To find out the rise/ run, find a place in the graphed line where it is on a plot point. For example: (40, 30). Then just see how much it rises and how much it runs.

Answer:

$ 1805

Step-by-step explanation:

2000 × 95%

= 1900

1900 × 95%

= 1805

Answer:

Below

Step-by-step explanation:

You are given   g     and    cm^3   and want to find density   (g/cm^3)

        28 g / 7 cm^3  = 4  g/cm^3

Answer:

4g/\(cm^{3}\)

Step-by-step explanation:

Answer:

The answer is below

Step-by-step explanation:

Tony is opening a pizza restaurant and needs to determine the amounts of ingredients he will use in his pizzas. He wants the amount of dough for a medium pizza to be 3/2 times the amount of dough for a small pizza. And, he wants the amount of dough for a large pizza to be 5/2 times the amount of dough for a small pizza. Also, the amount of dough used for one large pizza should to be equal to the amount of dough used for one medium and one small pizza. So, he needs to determine how much dough to use for a small pizza. Use this information to complete the following tasks.

Answer:

Let the amount of dough needed for a small pizza be S, the amount of dough needed for a medium pizza be M and the dough needed for a large pizza be L.

The amount of dough for a medium pizza to be 3/2 times the amount of dough for a small pizza, therefore:

M = (3/2)S

The amount of dough for a large pizza to be 5/2 times the amount of dough for a small pizza. Therefore

L = (5/2)S

the amount of dough used for one large pizza should to be equal to the amount of dough used for one medium and one small pizza. That is:

L = M + S

(5/2)S = (3/2)S + S

5S = 5S

The equation cannot be solved.

But if he wants the amount of dough for a large pizza to be 5/2 kg.

L = M + S

(5/2) = (3/2)S + S

S = 1 kg

The trigonometric function is given as

Apply the half angle identity to find the value of tan 75 ,

Here,

Now rationalize the function.

Again simplify the trigonometric function,

Hence the answer is 3.732.

Answer:

No

Step-by-step explanation:

The graph should be a line with negative slope, but the given graph is of a line with positive slope

Answer:   Z²+ 9Z + 8

Step-by-step explanation:

You take the two z's and times them to get Z² then you do the Z times 1 to get  1Z then you do the Z times 8  to get 8Z then you take the 8 times 1 and get 8 so then you add the like terms. You add 1Z and 8Z and you get 9Z.  The you put it in standard form to get Z²+9Z+8

Answer:

  22

Step-by-step explanation:

Let x represent the smaller integer. Then x+1 is the larger. Their sum is ...

  x +(x+1) = 45

  2x = 44 . . . . . subtract 1

  x = 22 . . . . . divide by 2

The smaller of the two integers is 22.

True. in an assignment a(:) = b, the number of elements in a and b must be the same.

In MATLAB, the assignment statement a(:) = b is used to assign the elements of b to the elements of a in a column-wise fashion. For this to work, the number of elements in a and b must be the same. If the number of elements in b is less than that of a, then the remaining elements of a will retain their previous values. If the number of elements in b is greater than that of a, then an error will occur.

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The required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
Let 'a' be the cost per gallon of fuel in the year 2000, and 'b' be the inflation rate per year. If the rate of inflation is constant then
After 7 year inflation = 7b
Cost of fuel in 2007 = a + 7b

Now,
according to the question
Change in cost of fuel
= cost in 2007 - cost in 2000
= a + 7b - a
= 7b

Thus, the required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.

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The supplementary angle means the sum of angles will be 180°. Hence the supplementary angle (or supplement) to a 55º angle is 125°.

When adding two or more angles, the result is 180°, and such pairs of angles are called linear pairs. The word 'linear' means 'straight', and 180° is also referred to as a straight angle. That is why a linear pair is always 180°.

Given angle is 55°.

To find the supplementary angle or supplement of 55º we must subtract 55º from 180°.

That is Supplement = 180 - 55 = 125°.

This is because supplementary angle means sum of two angles results in 180°.

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Answer:

The model on the top right.

Answer:

your answer would be the top right one

Step-by-step explanation:

I don't really know how to explain how I got my answer in words sorry.

Hope this helps! Have a great day ahead. Tell me if im wrong :) Stay Safe <3

To find the first five terms of the sequence defined by the recurrence relation n, for n1, 2, 3,..., where a1, we can use the given formula to generate the terms one by one.

The first five terms of the sequence defined by the recurrence relation n, for n1, 2, 3,..., where a1, are:

a1 = 1, a2 = 2, a3 = 3, a4 = 4, a5 = 5.

So, the first term of the sequence, a1, is simply given as a1 = 1, as per the recurrence relation.

To find the second term, we use the formula n, which means plugging in

n = 2: a2 = 2.

To find the third term, we use the formula again, but this time with

n = 3: a3 = 3.

We continue in this way, using the formula with n = 4 and n = 5 to find the fourth and fifth terms of the sequence, respectively:

a4 = 4

a5 = 5

Therefore, the first five terms of the sequence defined by the recurrence relation n, for n1, 2, 3,..., where a1, are:

a1 = 1, a2 = 2, a3 = 3, a4 = 4, a5 = 5.

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