Answer two questions about Systems A and B:
A
​4x+16y=12
x+2y=−9

B
​4x+16y=12
x+4y=3
​
1) How can we get System B from System A?
Choose 1 answer:

(Choice A, Checked, Correct)
CORRECT (SELECTED)
Replace one equation with a multiple of the other equation

The factor of the polynomial f(x) = x⁴ - 4x³ + 3x² + 4x -4 are x = -1, x = 1 and x = 2.

An equation is an expression that shows the relationship between two or more numbers and variables.

Given the function  f(x) = x⁴ - 4x³ + 3x² + 4x -4. The factor of the polynomial f(x) = x⁴ - 4x³ + 3x² + 4x -4 are x = -1, x = 1 and x = 2.

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Answer:

288

Step-by-step explanation:

[tex]26 * 8+(2^{6} +2^{4} )\\\\208+(64+16)\\208+80[/tex]

Answer:

288

Step-by-step explanation:

PEMDAS

Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Parentheses and Exponents:

(26) x 8+(64+16)          (28) x 8+(80)

Multiplication:

26 x 8 + 80       208+80

Addition:

208+80= 288

Answer:

913

Step-by-step explanation:

cylinder:

radius=5.6 height=7

first lets find the volume of the cylinder the formula for the volume of a cylinder is pi times radius squared times height. so after plugging in the height and radius you get 689.64242

cone:

radius=5.6 height=6.8

now the volume of the cone, the formula for the volume of a cone is pi times radius squared times height/3. so after plugging in the height and radius of the cone you get 223.31278

so 689.64242 + 223.31278= 912.9552 and that rounded to the nearest tenth is 913

The amount of money that is saved by purchasing the projector at Office and beyond is $144.

The first step is to determine the price of the projector at The Office spot.

Discounted price : (1 - 0.20) x $1200

0.80 x $1200 = $960

The second step is to determine the price of the projector at the Office and Beyond.

Discounted price : (1 - 0.15) x $960 = $816

Difference in price : 960 - 816 = $144

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Answer:

x = 0.76556443         x = -3.26556443

Step-by-step explanation:

You can use the quadratic formula to find the roots.

There are 7,800 different passwords.

Here we need to count the number of options for each of the digits of the password.

The first character has 26 options (26 letters in the alphabet).

The second character has 10 options (ditis from 0 to 9), and also does the third character

The fourth character has 3 options (%,*, or #)

The total number of different passwords that can be generated is given by the product between the numbers of options, so we have:

C = 26*10*10*3 = 7,800

There are 7,800 different passwords.

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The product of 12, x, and y written in an algebraic expression is 12xy.

Algebraic expressions are mathematical expressions containing variables, coefficients, and their arithmetic operators such as addition, subtraction, multiplication, and division.

An algebraic expression can be used to interpret and solve mathematical word problems.

From the information given:

The algebraic expression can be translated as 12x × y = 12 xy.

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The algebraic expression that can be translated as product of 12, x and y is 12 xy.

Expressions are used to interpret mathematical problems

From the question given we are to translate the product of 12, x and y.

The product of 12 and x is 12x

The product of 12x and y is 12xy, hence the algebraic expression that can be translated as product of 12, x and y is 12 xy.

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Answer:

a. 17

b. 30

c. 5

Step-by-step explanation:

English (E) = 28 - 15 (10+8-3) = 13

Amharic (A) = 30 - 10 (8+5-3) = 20

Afan Oromo (AO) = 42 - 12(10+5-3) = 30

E+AO = 10

E + A = 8

A + AO = 5

A + AO + E = 3

a. 13 people spoke just English+ 20 people who just spoke Amharic + 30 people who just spoke Afan Oromo+ The multilingual people (10+8+5-3=20) which is 83, so that means that 17 learned no language.

b. 42 People learned Afan Oromo, but only 30 of them learned that language separately. 10 People learned it along with English, and 5 learned it with Amharic. However, 3 of those people were the same, so 12 people of those 42 spoke multiple languages. Therefore, only 30 people spoke just Afan Oromo.

c. This one is kinda just a trick question, they want you to overthink it because of the 3 who learned all, but it's just 5 like it says in the question.

The forecast for week 13 is 9.7%

a) MAD without the forecast = 43.71

MAD with the forecast = 45.59

b) MAPE = 0.097

MAPE= 9.7%

642 602 656 747 663 618 731 726 679 737 664 740

Mean Absolute deviation is given as

MAD = [Σ|x - μ|]/N

We first calculate the mean

Mean = Σx/N

Mean = (642+602+656+747+663+618+731+726+679+737+664+740)/12

Mean = (8205/12)

Mean= 683.75

absolute deviations from the mean

|642-683.75| + |602-683.75| + |656-683.75| + |747-683.75| + |663-683.75| + |618-683.75| + |731-683.75| + |726-683.75| + |679-683.75| + |737-683.75| + |664-683.75| + |740-683.75|

Absolute deviations from the mean

41.75+81.75+27.75+63.25+20.75+65.75+47.25+42.25+4.75+53.25+19.75+56.25= 524.5.

MAD = [Σ|x - μ|]/N

MAD = (524.5/12)

MAD = 43.71

If we include the forecast for the 13th week

642 602 656 747 663 618 731 726 679 737 664 740 747

Mean = (8205+747)/13

Mean = 688.62

absolute deviations from the mean

|642-688.62| + |602-688.62| + |656-688.62| + |747-688.62| + |663-688.62| + |618-688.62| + |731-688.62| + |726-688.62| + |679-688.62| + |737-688.62| + |664-688.62| + |740-688.62| + |747-688.62|

Absolute deviations from the mean

=46.62+86.62+32.62+58.38+25.62+70.62+42.38+37.38+9.62+48.38+24.62+51.38+58.38

= 592.62

MAD = (592.62/13)

MAD = 45.59.

b) MAPE is used to check forecast errors

MAPE = (1/N) Σ [|x-f|/x]

where N = Sample size = 12

x = each variable

f = the forecasted value = 747

x = 642, 602, 656, 747, 663, 618, 731, 726, 679, 737, 664, 740

Σ[|xf|/x]=0.164+0.241+0.139+0+0.112+0.209+0.022+0.029+0.100+0.014+0.125+0.009

Σ [|x-f|/x] = 1.164

MAPE = (1.164/12)

MAPE = 0.097

MAPE=9.7%

The forecast for week 13 is 9.7%.

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The reason that would support that is ∠B ≅ ∠B , the reflective property of equality.

Similar triangles are triangles that have their corresponding angles equal and the ratio of their corresponding lengths also equal.

Analysis:

triangle BDE and BAC share the same angle B

which means ∠DBE = ∠ABC.

The reflective property of equality says a number is always equal to itself. Therefore, ∠B ≅ ∠B

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The future value is $10,354.72.

The total interest earned is $754.72.

When an amount is compounded quarterly, it means that both the amount deposited and interest already earned increases in value every quarter.

The future value = quarterly deposit x annuity factor

Annuity factor = {[(1+r)^n] - 1} / r

Where:

Annuity factor = [1.01^16) - 1 ] / 0.01 = 17.26

17.26 x 600 = $10,354.72

Total interest earned = future value - total amount deposited

Total amount deposited  = $600 X 4 X 4 = 9600

$10,354.72 - 9600 = $754.72

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The volume of the sawdust pile is 11,039.06 ft³.

The shape of the sawdust pile would be a cone. The diameter is always proportional to its height.

Diameter = k x height

where k is equivalent to the rate of increase of the diameter with respect to the increase in height.

25= k20

k = 25 / 20

k = 1.25

Diameter when height is 30 ft = 1.25x 30 = 35.50 feet

Volume of the sawdust = [tex]\frac{1}{3}[/tex]πr²h

Where:

[tex]\frac{1}{3}[/tex] x 3.14 x 18.75² x 30 = 11,039.06 ft³

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A function assigns the values. The number 20 describes the cost that Bobby needs to pay for each extra ounce of letters.

A function assigns the value of each element of one set to the other specific element of another set.

In the given function y = 30 + 20(x - 1), the number 20 describes the cost that Bobby needs to pay for each extra ounce of letters.

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The expression which gives the area of triangle QRS is [tex]\frac{1}{2} (9)(15)sin(20^{o} )[/tex].

We need to find the area of triangle QRS.

The area of a triangle can be expressed using the lengths of two sides and the sine of the included angle. Area of Δ = ½ ab sin C.

Now, the area of the triangle QRS[tex]=\frac{1}{2} (9)(15)sin(20^{o} )[/tex]

Therefore, the expression which gives the area of triangle QRS is [tex]\frac{1}{2} (9)(15)sin(20^{o} )[/tex].

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In statistics, a Chi-squared test may be used to determine holiday choice and gender and α (alpha) is the response variable.

A statistical technique called the chi-square test is used to compare actual outcomes with predictions.

The goal of this test is to establish if a discrepancy between actual and predicted data is the result of chance or a correlation between the variables you are researching.

Whether there is a statistically significant association between categorical variables is determined by the Chi-square test of independence.

This issue is addressed by a hypothesis test. The chi-square test of association is another name for this assessment.

Hence,in stats would a test looking at gender & holiday preference yes you can do  a Chi-squared test and α(alpha) is the response variable.

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x is powering both numbers so it can be outside the parenthesis.

We have given that 3^x.

An expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.

The first one isn't an answer because 3^x is exponential while x^3 is a cubic function.

If you draw them you will see that they are very different.

B is correct because we can divide both numerator and denominator by 6 and we get 3^x.

C is not correct because x is not powering 3 so we cannot divide both by 6D is correct because 3^(x-1) is the same as

and when multiplied by 3 we get 3^x

3^x*3^(-1) = 3^x/3

E is not correct.

will understand after the explanation in DF is correct.

x is powering both numbers so it can be outside the parenthesis.

The question is incomplete the complete question is,

Which expressions are equivalent to the one below? Check all that apply.

3^x

A. x^3

B.(18/6)^x

C.18^x/3

D.3(3^(x-1))

E.3(3^(x+1))

F.18^x/6^x

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The value of Z at the 5% level is not significant if the sample of size 400 has mean is 6.0.

It is defined as the measure of data disbursement, It gives an idea about how much is the data spread out.

[tex]\rm \sigma = \sqrt{\dfrac{ \sum (x_i-X)}{n}[/tex]

σ is the standard deviation

xi is each value from the data set

X is the mean of the data set

n is the number of observations in the data set.

The standard error of the estimated mean:

[tex]\rm = \dfrac{2.5}{\sqrt{400}}[/tex]

= 0.1125

x = 6.0–6.2 = 0.2

[tex]\rm Z = \dfrac{0.2}{0.1125}[/tex]

Z = 1.778

This is not significant at the 5% level.

This would have been significant at the 5% level if the same sample means had been found using a sample size of merely 500.

Thus, the value of Z at the 5% level is not significant if the sample of size 400 has mean is 6.0.

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The value of f(g(7)) is 20

The functions are given as:

f(x) = x^2 + x

g(x) = x - 3

Start by calculating g(7)

g(7) = 7 - 3

Evaluate

g(7) = 4

So, we have:

f(g(7)) = f(4)

Substitute 4 for x in f(x) = x^2 + x

f(4) = 4^2 + 4

Evaluate

f(4) = 20

Hence, the value of f(g(7)) is 20

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Answer:

30-5×2 of 3+(19-3) ÷8

Step-by-step explanation:

30-5×6+(19-3)÷8

30-5×6+16÷8

30-30+8

38-30

8

Answer:

Step-by-step explanation:

b

Hello,

"perpendicular to the line y= - 1/2x +4 "

so y = -1/2x + p

-1/2 × 6 + p = 4 ⇔ -3 + p = 4 ⇔ p = 4 + 3 = 7

y = -1/2x + 7

Answer: x>-5

Step-by-step explanation:

add 4 to both sides

5x-4+4<11+8x+4

simplify

5x<8x+15

subtract 8x from both sides

5x-8x<8x+15

simplify

-3x<15

divide both sides by -3 and switch inequality sign

-3x/-3>-15/-3

x>-5

[tex]\large\displaystyle\text{$\begin{gathered}\sf 5x-4 < 11+8x \end{gathered}$}[/tex]

Simplify both sides of the inequality.

[tex]\large\displaystyle\text{$\begin{gathered}\sf 5x-4 < 8x+11 \end{gathered}$}[/tex]

Subtract 8x from both sides.

[tex]\large\displaystyle\text{$\begin{gathered}\sf 5x-4-8x < 8x+11-8x \end{gathered}$}[/tex]

[tex]\large\displaystyle\text{$\begin{gathered}\sf -3x-4 < 11 \end{gathered}$}[/tex]

Add 4 to both sides.

[tex]\large\displaystyle\text{$\begin{gathered}\sf -3x-4+4 < 11+4 \end{gathered}$}[/tex]

[tex]\large\displaystyle\text{$\begin{gathered}\sf -3x < 15 \end{gathered}$}[/tex]

Divide both sides by -3.

[tex]\large\displaystyle\text{$\begin{gathered}\sf \frac{-3x}{-3} < \frac{15}{-3} \end{gathered}$}[/tex]

[tex]\large\displaystyle\text{$\begin{gathered}\sf x > -5 \ \ \iff \ \ \ Answer \end{gathered}$}[/tex]

The difference in the rate of change of both functions is: 15.

Rate of change of a linear function = change in y / change in x.

Function A is given as: y = 35x. The rate of change for function A is 35.

From the graph of function B, using two points, (1, 50) and (2, 100):

Rate of change = (100 - 50)/(2 - 1)

Rate of change = 50.

Therefore, the difference in the rate of change of both functions = 50 - 35 = 15.

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Step-by-step explanation:

as speed is always

distance/time

we need to multiply speed by the time traveled to get the distance traveled.

so,

d = 95t + 65

after all, until it reached the city it traveled already 65 miles (we don't know the speed, but it does not matter for the question about the total distance traveled), which we need to add to get the total distance.

The required  exponential function that contains the points (3,24) and (4,48) is y = 3(2)^x

The standard exponential function is expresses as y = ab^x

Given the coordinate points (3,24) and (4,48), the equivalent equations are:

24 = ab^3 ......... 1

48 = ab^4

Take the ratios

48/24 = b^4/b^3

2 = b

Substitute b = 2 into equation 1

24 = a(2)^3

8a = 24

a = 3

Hence the required  exponential function that contains the points (3,24) and (4,48) is y = 3(2)^x

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Answer:

4^2+4

Step-by-step explanation:

one 2 and two 4s

so 4^2+4=16+4=20

so 4^2+4

(calculation)

Answer:

1 deer

Step-by-step explanation:

18 deer minus 17 eaten leaves 1 deer

Answer:

862

Step-by-step explanation:

4 x 2 = 8

3 x 2 = 6

8 + 6 + 2 = 16

The measure of arc ECF in circle G is 98°. The correct option is the second option 98°

From the question, we are to determine the measure of arc ECF

By using the one of the circle theorems

The angle subtended by an arc of a circle is twice the angle it subtends anywhere on the circle's circumference

In the given diagram,

∠F = 1/2 ×104°

∠F = 52°

∠D + ∠E + ∠F = 180° (Sum of angles in a triangle)

∠D + 79° + 52° = 180°

∠D = 180° - 79° - 52°

∠D = 49°

m arc ECF = 2 × m ∠D

m arc ECF = 2 × 49°

m arc ECF = 98°

Hence, the measure of arc ECF in circle G is 98°. The correct option is the second option 98°

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Answer:

the last option

Step-by-step explanation:

please put brainliest

The economic order quantity is 385 and reorder point is 254.

a. Economic order quantity (EOQ)

EOQ=√2×D×C÷H

Where:

D =Annual Demand

S = Cost of Ordering

H=Holding cost

Hence:

EOQ=√2×5300×70÷.25×20

EOQ=√742,000÷5

EOQ=√148,400

EOQ=385

b. Reorder point

Reorder point=5300/250×12 days

Reorder point=254

c. Reorder point

Reorder point=5300/250×35 days

Reorder point=742

d. Reorder point

Reorder point=742-385

Reorder point=357

Therefore the economic order quantity is 385 and Reorder point is 254.

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The complete question is:

a. If the cost of the part is $20 per unit, what is the economic order quantity?

b. Assume 250 days of operation per year. If the lead time for an order is 12 days, what

is the reorder point?

c. If the lead time for the part is seven weeks (35 days), what is the reorder point?

d. What is the reorder point for part (c) if the reorder point is expressed in terms of the inventory on hand rather than the inventory position?