Which expression uses the associative property to make it easier to evaluate 14(1/7 2/5)?
A. 14(2/5.1/7)
B. 7(1/14.2/5)
C. (14.5/2)1/7
D. (14.1/7)2/5

Answer:1 cup of chocolate chips for every 1and 3/4 cup of flour

so divide 4 and 2/3 x 1 and 3/4

turn them both into fractions

4 2/3 = 14/3

1 3/4 = 7/4

14/3 / 7/4 = 14/3 x 4/7 = 56/21 = 2 and 2/3 cups of chocolate chips are needed

Step-by-step explanation:

Answer:

Step-by-step explanation:

15+5x=20x

   -5x  -5x  => Subtract 5x from each side

You get

15 = 15x

Divide both sides by 15

1=x

The coordinate of the midpoint of the line segment is (-1.5, -5.5)

The coordinate of the midpoint of a line is the half x values and y values. Thus:

Xm = (X1 + X2)/2 and Ym = (Y1 + Y2)/2

where m is the midpoint

Given:  (−1, −1) and (−2,−10)

X1 = -1, Y1 = -1 and X2 = -2, Y2 = -10

Xm = (-1 +(-2))/2  = -1-2/2 = -3/2 = -1.5

Ym = (-10 + (-1)) = -10-1/2 = -11/2 = - 5.5

Therefore, the coordinates of the midpoint are x = -1.5 and y = -5.5 or (-1.5, -5.5)

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Answer:

B

Step-by-step explanation:

The measure of angle seven is 70 since 180 - 110 = 70. The measure of angle three is equal to the measure of angle seven using the Corresponding Angles Theorem

The amount of solar radiation available is 415.4 W/m² and the albedo was higher during the last glacial maximum than it is today because there was more ice and snow on the planet.

Radiation refers to the emission and transmission of energy through space or a material medium in the form of electromagnetic waves or energetic particles. Radiation can take many forms, including light, X-rays, and radio waves, and can be either ionizing (having enough energy to remove electrons from atoms and molecules) or non-ionizing (having insufficient energy to cause ionization). Radiation is a fundamental aspect of physics and plays a crucial role in many natural processes, such as nuclear reactions and the warming of the Earth by the sun.

a) The amount of solar radiation available to warm the average square meter on Earth during the last glacial maximum can be found by multiplying the solar constant by the average albedo:

En = 1363 W/m² * 0.305 = 415.4 W/m²

b) The albedo was higher during the last glacial maximum than it is today because there was more ice and snow on the planet. Ice and snow are very reflective and therefore have a high albedo, which means that they reflect more of the incoming solar radiation back into space, making the planet cooler. During the last glacial maximum, there was more ice and snow, which led to a higher average albedo and a cooler planet.

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Answer:

97

Step-by-step explanation:

Number of adult tickets = a.

Number of student tickets = s.

"A total of 388 tickets were sold"

a + s = 388

"the number of student tickets sold was three times the number of adult tickets sold"

s = 3a

a + s = 388

s = 3a

Substitute s in the first equation with 3a.

a + 3a = 388

4a = 388

a = 97

Answer: 97 tickets

Answer: 23.76 sq yds

Step-by-step explanation:

0.5*9.9*4.7=23.76

Area of triangle: 0.5*b*h

Answer:

10

Step-by-step explanation:

Because there is one more 0 in 100,000 than there is in 10,000, you can just put that extra 0 after a 1. I hope this helps you.

Answer:

x = 163.5

x = 1.2

Step-by-step explanation:

Recall: SOH CAH TOA

For the first triangle:

Reference angle = 73°

Opposite = x

Adjacent = 50

Apply TOA:

Tan 73° = Opp/Adj

Tan 73° = x/50

50*Tan 73° = x

163.542631 = x

x = 163.5 (nearest tenth)

For the first triangle:

Reference angle = 4°

Opposite = x

Adjacent = 17

Apply TOA:

Tan 4° = Opp/Adj

Tan 4° = x/17

17*Tan 4° = x

1.1887558 = x

x = 1.2 (nearest tenth)

Answer:

3.34.

Step-by-step explanation:

4.2 * 0.2 + 2.5

= 0.84 + 2.5

= 3.34.

Answer:

3.34

Step-by-step explanation:

the product is 4.2×0.2=0.84

add is 2.5 + 0.84=3.34

Answer:

(5 + 16)=7 + (4 x 7)

Step by step - explanation:

Solve:

Add the numbers

(5 + 16)= 21.

(4 x 7) = 28 + 7 = 35.

So the result is 21 = 35.

Hope that helps. x

Answer:

Step-by-step explanation:

(5+16)=7+(4.7)

(21)=7+(4.7)

21=7+(4.7)

21=7+(28)

21=7+28

21=35

Answer: 21=35

Answer:

12x + 3y + 9

Step-by-step explanation:

Im not sure if you can add constants to variables so here is my simplified expression.

To make the fractions equivalent, we need to find the missing numerators that would make them equal. Let's fill in the missing numerators:

1/2 and __/8

To make the fractions equivalent, we can multiply both the numerator and denominator of the first fraction by 4:

1/2 and 4/8

Now, the fractions are equivalent.

---

4/12 and __/60

To make the fractions equivalent, we can multiply both the numerator and denominator of the first fraction by 5:

4/12 and 20/60

Now, the fractions are equivalent.

---

2/3 and __/12

To make the fractions equivalent, we can multiply both the numerator and denominator of the first fraction by 4:

2/3 and 8/12

Now, the fractions are equivalent.

---

4/4 and __/8

To make the fractions equivalent, we can multiply both the numerator and denominator of the first fraction by 2:

4/4 and 8/8

Now, the fractions are equivalent.

When finding the area of a rectangle, it is correct to use the formula "length x width" or "width x length."

These two expressions are interchangeable because the multiplication operation is commutative, meaning the order of multiplication does not affect the result.

The reason why "length x width" or "width x length" is used to calculate the area of a rectangle is based on the definition of area. The area of a rectangle represents the amount of two-dimensional space enclosed within its boundaries.

The length of a rectangle refers to the longer side or dimension, while the width refers to the shorter side or dimension. By multiplying the length and width together, we are essentially determining the product of the two dimensions, which represents the total area of the rectangle.

For example, if we have a rectangle with a length of 6 units and a width of 4 units, the area can be calculated as follows:

Area = Length x Width = 6 units x 4 units = 24 square units

In summary, it is correct to use "length x width" or "width x length" to find the area of a rectangle because the order of multiplication does not affect the result, and the product of the dimensions represents the total enclosed space within the rectangle.

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5t-3=3t+9

5t-3-3t=3t+9-3t

2t-3=9

2t-3+3=9+3

2t=12

2t/2 =12/2

t=6

Answer:

I am not sure of the answer if it is 4

4

Answer:

the number of chicken sandwiches = 9

Step-by-step explanation:

let x be the number of chicken sandwiches 

    y be the number of tuna sandwiches

We have to solve this system:

\(\begin{cases}x+y=15&\\ 2.3x+2.4y=35.1&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-x&\\ 2.3x+ 2.4(15-x)=35.1&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-x&\\ 2.3x+ 36 -2.4x=35.1&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-x&\\ -0.1x + 36=35.1&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-x&\\ -0.1x=-0.9&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-x&\\ x = 9&\end{cases}\)

\(\Longleftrightarrow \begin{cases}y=15-9=6&\\ x = 9&\end{cases}\)

In order to get the total amount $91,000 at the end of the 7 year, the interest rate is 2.2% on compound interest basis.

Compound Interest:

The general form to calculate the compound interest is written as,

A = P(1 + r/n)ⁿˣ

where

A = Accrued amount (principal + interest)

P = Principal amount

r = Annual nominal interest rate as a decimal

n = number of compounding periods per unit of time

x = time in decimal years

Given,

Naomi is going to invest $78,000 and leave it in an account for 7 years. Assuming the interest is compounded daily.

Here we need to find the  nearest hundredth of a percent, would be required in order for Naomi to end up with $91,000.

Here we have to solve for rate r as a decimal

\(r = n[(A/P)^{1/nt} - 1]\)

r = 365 × [(91,000.00/78,000.00)1/(365)(7) - 1]

r = 0.022022202

Then convert r to R as a percentage

R = r * 100

R = 0.022022202 * 100

R = 2.202%/year

Therefore, the interest rate required to get a total amount of $91,000.00 from compound interest on a principal of $78,000.00 compounded 365 times per year over 7 years is 2.202% per year.

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By fraction method, 55/16 pounds of rice Belle purchased.

In math, what is a fraction?

Part of a whole is a fraction. In mathematics, the number is represented as a quotient, where the numerator and denominator are divided. Both are integers in a simple fraction.

                                 Whether it is in the numerator or denominator, a complex fraction contains a fraction. The numerator and denominator of a correct fraction are opposite each other.

  = 2 3/4 * 5/4

   = 5/4 * 2 + 5/4 *  3/4

   = 5/2 + 5/4 * 3/4

  = 5/2 + 15/ 4 * 4

  = 5/2 + 15/16

  common denominator and write the numerators above common denominator   =   5 *8/16 + 15/16

         = 40/16 + 15/16

         = 40 + 15/16

          = 55/16

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Answer:

you have to give is more than that

Step-by-step explanation:

mb 27

Answer:

the length of BE is 27 units

Step-by-step explanation:

The Growth functions are:

\(N = 2000(1.12)^{t}\)

\(N = N_{0} e^{kt}\) where k > 0

The Decay Functions are:

\(A = A_{0}(0.95)^{t}\)

\(N = N_{0} e^{kt}\) where k < 0

\(A = Pe^{-rt}\)

\(A = A_{0}(1 - \frac{r}{n})^{nt}\)

Exponential growth and decay function:

Exponential growth refers to when the quantity is increasing over time, while exponential decay refers to when the quantity is decreasing over time.

The general form of growth functions is:

y = \(ab^{kt}\)

where: a ≠ 0 and b ≠ 0

The conditions for the functions are:

1) When b > 1, k > 0, it represents exponential growth function

2) When 0 < b < 1, k > 0, it represents exponential decay function

3) When b > 1, k < 0, it represents exponential decay function

Thus:

Growth functions are:

\(N = 2000(1.12)^{t}\)

\(N = N_{0} e^{kt}\) where k > 0

Decay Functions are:

\(A = A_{0}(0.95)^{t}\)

\(N = N_{0} e^{kt}\) where k < 0

\(A = Pe^{-rt}\)

\(A = A_{0}(1 - \frac{r}{n})^{nt}\)

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The percentage improvement in reliability when test length is doubled is 15%

R(n) = 0.25n / (0.75 + 0.25n)

substitute n = 1 into the equation :

R(n) = 0.25n / (0.75 + 0.25n)

R(1) = 0.25(1) / (0.75 + 0.25(1))

R(1) = 0.25 / 1

R(1) = 0.25

when test length is doubled , n = 2

substitute n = 1 into the equation :

R(n) = 0.25n / (0.75 + 0.25n)

R(2) = 0.25(2) / (0.75 + 0.25(2))

R(2) = 0.5 / 1.25

R(2) = 0.4

Percentage improvement can be calculated thus ;

R(2)-R(1)/R(1) × 100%

(0.4-0.25)/0.25 × 100%

0.15 × 100%

=15%

Therefore, percentage improvement in reliability is 15%

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Answer:

hey pls help me I urgently need help

The point charges placed 0.500 m apart are 10.4 nC and 43.9 nC. Then, the electric field halfway between these charges will be -4824 N/C.

The physical field that surrounds particles with an electrical charge is called an electric field. All other charged particles in the field are affected by it, either being attracted to it or being repelled by it.

The electric field because of a point charge q is written as \(E=\frac{kq}{r^2}\)

Positive point charges cause the electric field to point away from the point, whereas negative point charges cause the electric field to point in the direction of the point. Then, the electric field of the midpoint p in the diagram is written as,

\(\begin{aligned}E_p&=\mathrm{\frac{k(10.4\;nC)}{(0.25\;m)^2}-\frac{k(43.9\;nC)}{(0.25\;m)^2}}\\&=\mathrm{\frac{k(10.4-43.9)\times10^{-9}\;C}{(0.25\;m)^2}}\\&=-\mathrm{\frac{9\times 10^9\;Nm^2/C^2\times 33.5\times10^{-9}\;C}{(0.25\;m)^2}}\\&=-\mathrm{4824\;N/C}\end{aligned}\)

The required answer is -4824 N/C.

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Length of scarf before unraveling = 4.75 + 0.75 = 5.5.

Equation: Length before unraveling = 4.75 + 0.75

Sadie is knitting a striped scarf for her grandfather for his birthday, but discovers a mistake and has to unravel 0.75 of the scarf. After unraveling, the remaining part of the scarf is 4.75 long. To calculate the length of the scarf before it was unraveled, we can use an equation. The equation we will use is Length before unraveling = 4.75 + 0.75. We can interpret this equation as the length before unraveling being equal to the length after unraveling plus the amount unraveled. Therefore, the length of the scarf before unraveling is 4.75 + 0.75, which is equal to 5.5. This equation is useful for finding the original length of the scarf, as it takes into account the amount that was unraveled. Therefore, the original length of the scarf is 5.5.

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Answer:

125 cm

Step-by-step explanation:

If you separate the shape, you get an area of 50, 50, and 25. you then add these together to get 125

The equations of the three altitudes of triangle ABC include the following:

A triangle can be defined as a two-dimensional geometric shape that comprises three (3) sides, three (3) vertices and three (3) angles only.

A slope is also referred to as gradient and it's typically used to describe both the ratio, direction and steepness of the function of a straight line.

Mathematically, the slope of a straight line can be calculated by using this formula;

\(Slope, m = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope, m = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}\)

Also, the point-slope form of a straight line is given by this equation:

y - y₁ = m(x - x₁)

Assuming the following parameters for triangle ABC:

For the equation of altitude AM, we have:

Slope of BC = (2 - 8)/(4 - 0)

Slope of BC = -6/4

Slope of BC = -3/2

Slope of AM = -1/slope of BC

Slope of AM = -1/(-3/2)

Slope of AM = 2/3.

The equation of altitude AM is given by:

y - y₁ = m(x - x₁)

y - 0 = 2/3(x - (-2))

3y = 2(x + 2)

3y = 2x + 4

3y - 2y - 4 = 0.

For the equation of altitude BN, we have:

Slope of CA = (2 - 0)/(4 - (-2))

Slope of CA = 2/6

Slope of CA = 1/3

Slope of BN = -1/slope of CA

Slope of BN = -1/(1/3)

Slope of BN = -3.

The equation of altitude BN is given by:

y - y₁ = m(x - x₁)

y - 8 = -3(x - 0)

y - 8 = -3x

y + 3x - 8 = 0.

For the equation of altitude CL, we have:

Slope of AB = (8 - 0)/(0 - (-2))

Slope of AB = 8/2

Slope of AB = 4

Slope of CL = -1/slope of AB

Slope of CL = -1/4

The equation of altitude CL is given by:

y - y₁ = m(x - x₁)

y - 2 = -1/4(x - 4)

4y - 2= -(x - 4)

4y - 2= -x + 4

4y + x - 2 - 4 = 0.

4y + x - 6 = 0.

In conclusion, we can infer and logically deduce that the equations of the three altitudes of triangle ABC include the following:

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Answer:

360 yards in 2 hours

Step-by-step explanation:

6 yards in 2 minutes = 3 yards in 1 minute

2 hours = 120 minutes

3*120

360 yards