need help and show all work.

By using simultaneous linear equation, it can be concluded that-

They should sell only scratching post during the last two weeks of the fundraiser

Third option is correct

What is simultaneous linear equation?

At first, it is important to know about linear equation.

Equation shows the equality between two algebraic expressions by connecting the two algebraic expressions by an equal to sign

A one degree equation is known as linear equation.

Two or more linear equations, which can be solved together to obtain common solution are known as simultaneous linear equation.

Here, a system of simultaneous linear equation needs to be solved

Let the cost of one collar be $x and the cost of one scratching post be $y

The first week they sold seven collars and 10 scratching posts and donated $299.83.

7x  + 10y = 299.83 ..... (1)

The second week they sold nine collars and 18 scratching posts and donated $482.85.

9x + 18y = 482.85 .... (2)

Multiplying (1) by 9 and (2) by 5

63x + 90y = 2698.47 ..... (3)

45x + 90y = 2414.25 ... (4)

Subraction (4) from (3)

18x = 284.22

x = [tex]\frac{284.22}{18}[/tex]

x = $15.79

Putting the value of x in (1)

7 [tex]\times[/tex] 15.79 + 10y = 299.83
110.53 + 10y = 299.83

10y = 299.83 - 110.53

10y = 189.3

y = [tex]\frac{189.3}{10}[/tex]

y = $18.93

Since the cost of one scratching post is more than cost of one collars, they should sold scratching post  during the last two weeks of the fundrasiser

Third option is correct

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Complete Question

The complete Question has been attached

Answer:

h≈1.15cm is the correct answer

Answer: h is about 1.15 cm

Step-by-step explanation:

For an average intake of 2200 calories per day, the number of acres of land is approximately 2.

A function having the formula f(x) = ax' + b is said to be linear.

It appears to be a standard linear equation, except the linear function symbol is f rather than y. (x).

You would be given the value of f(x) and asked to locate x when solving a linear function.

C(x) is a variable that tells the number of calories consumed daily by a person

x is the number of acres that person own.

C(x) = 270ln(x+1)+1900

In the given question number of acres ask a person have who consumed 2200 calories in a day.

Therefore,

C(x)=2200

2200=270ln(x+1)+1900

2200-1900=270ln(x+1)

300=270ln(x+1)

300/270 = ㏑(x+1)

10/9 = ㏑(x+1)

x+1 = e^(10/9)

x+1 = 3.037

x= 3.037-1

x=2.037

x=2(round off)

Therefore, 2 acres of land a person can consume 2200 calories in a day.

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The first six terms of the given sequence are given as  3, -7, -17, -27, -37 and -47.

An arithmetic sequence is a kind of sequence of numbers where the difference of any two consecutive terms are the same.

This difference is known as the common difference of the sequence.

The given problem can be solved as follows,

The first term of the sequence is a₁ = 3

And, the common difference is d = -10.

Now, the first six terms can be written as,

a₁ = 3

a₂ = 3 - 10

   = -7

a₃ = -7 - 10

    = -17

a₄ = -17 - 10

    = -27

a₅ = -27 - 10

    = -37

a₆ = -37 - 10

    = -47

They can be graphed on the number line as follows,

Hence, the first six terms are given as 3, -7, -17, -27, -37 and -47.

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A 95% two-sided confidence interval is 0.46 < a <0.31 .

The formula for confidence interval for population standard deviation is,

[tex]s\sqrt{\frac{n-1}{X^{2} _{1-a/2,n-1} } }[/tex]  < a < [tex]s\sqrt{\frac{n-1}{X^{2} _{a/2,n-1} } }[/tex]

Given in question,

Significance level, a = 1 - 0.95

                                 = 0.05

Sample size, n = 51

Sample standard deviation, s = 0.37

By using chi-square distribution table, we get

[tex]X^{2} _{1-a/2,n-1}[/tex] = [tex]X^{2} _{0.975,50}[/tex]

                  = 32.36

[tex]X^{2} _{a/2,n-1}[/tex] = [tex]X^{2} _{0.025,50}[/tex]

              = 71.42

Confidence interval for population standard deviation is :

[tex]0.37\sqrt{\frac{50}{32.36} }[/tex]  < a  < [tex]0.37\sqrt{\frac{50}{71.42} }[/tex]

0.45992018426 < a < 0.30958278534

Hence, a 95% two-sided confidence interval is 0.46 < a <0.31 .

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Answer:

(5,-3), (10,-6)

Step-by-step explanation:

Refer to the attachment for graph.

What are vector equations ?

Vector equations allow for the creation of parametric curves. That is, points in space are formed for each value of the parameter by the equation of a vector, where each of its elements has a function with an independent variable that we refer to as a parameter.

Given  vector equation:

r(t) = < t², t, 2 >

When t= -2,

r(-2) = < (-2)², -2, 2 >

      =  < 4, -2, 2 >

This means. when t= -2, the curve touches the point   ( 4, -2, 2 )

Similarly, when t= -1, the curve touches the point   ( 1, -1, 2 )

Table is attached.

graph is attached.

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Answer:

15 cents

Step-by-step explanation:

[tex]\frac{11}{33} =\frac{5}{y}[/tex]

Cross Multiply.

11 · y = 5 · 33

11y = 165

11y ÷ 11 = 165 ÷ 11

y = 15

The coefficient of correlation is -0.90

The percentage of the dependent variable's variance that is predicted from the independent variable is known as the coefficient of determination or R squared method. It shows how much variety there is in the given data collection.

The range of the coefficient of determination, which is the square of the correlation(r), is 0 to 1.

The square of the correlation between the x and y variables is used to calculate the coefficient of determination in linear regression.

The dependent variable cannot be predicted from the independent variable if R2 is equal to 0.

The dependent variable can be accurately predicted from the independent variable if R2 is equal to 1.

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The disparity -9x/11 - 7 < -5 is x > -22/9

The equals sign in the equation-like statement 5x 4 > 2x + 3 has been replaced by an arrowhead. This is a prime instance of inequality. This indicates that the left half, 5x 4, is larger than the right part, 2x + 3, in the equation.

Mathematical expressions with inequalities on both sides are known as inequalities. In an inequality, we compare two values as opposed to equations. In between, the equal sign is changed to a less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

The equals sign in the equation-like statement 5x 4 > 2x + 3 has been replaced by an arrowhead. This is a prime instance of inequality.

-9x/11 < 2 (add 7 to both sides) (add 7 to both sides)

-9x < 22 (multiply both sides by 11) (multiply both sides by 11)

x > 22/-9 Because you are dividing by a negative integer, change the sign.

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Answer: x > [tex]\frac{-22}{9}[/tex]

Step-by-step explanation:

     To solve this inequality, we will isolate the variable, x, with inverse operations.

   Given:

[tex]\frac{-9x}{11}[/tex]- 7 < -5

   Add 7 to both sides of the inequality:

[tex]\frac{-9x}{11}[/tex] < 2

   Multiply both sides of the inequality by 11:

-9x < 22

   Divide both sides of the inequality by -9:

* note, we must "flip" the sign since we are dividing by a negative integer

x > [tex]\frac{-22}{9}[/tex]

By using the properties of parallel lines, it can be inferred that -

Corrosponding angle goes in the place of first question mark and substitution property of equality goes in the place of second question mark.

What are parallel lines?

Two lines are said to be parallel if on extending them indefinitely, they will never intersect

Transversal is a line that intersects two or more parallel lines

For the first question mark

[tex]\angle ASR \cong \angle AVU[/tex] [Corrosponding angle]

For the second question mark

[tex]m\angle AVU = 90^{\circ}[/tex] [Substitution property of equality]

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Cr Cash 4,900 which is Interest paid annually on December 31.

Compound interest is defined as interest paid on the original principal and the interest earned on the interest of the principal.

Pretzelmania, Inc., issues 7%, 10-year bonds with a face amount of $70,000 $70,000 on January 1, 2015. The market interest rate for bonds of similar risk and maturity is 7%. Interest is paid annually on December 31.

January 1, 2015, bonds issued at par value

Dr Cash 70,000

   Cr Bonds payable 70,000

June 30, 2015, first coupon payment

Dr Interest expense of 4,900

   Cr Cash 4,900

Thus, Cr Cash 4,900 which is Interest paid annually on December 31.

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Answer:

0.95-1.05 (please give brainliest)

Step-by-step explanation

1x.95=.95

1x1.05=1.05

To keep the obtuse isosceles triangle design, the railing that he should order a duplicate of to create his dining area is of:

12 meters.

A set of measurements can represent a triangle if the sum of the two smaller measurements is greater than the greater measures.

The measurements in this triangle are given as follows:

If he orders a duplicate of the largest measurement, the smallest measurement would be the base of the isosceles triangle, meaning that it would be an acute isosceles triangle.

Then he should order a duplicate of the smallest measurement, of 12 meters, as then they would be the sides between the obtuse angle of the isosceles triangle.

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Answer:

Step-by-step explanation:

To keep the obtuse isosceles triangle design, the railing that he should order a duplicate of to create his dining area is of:

12 meters.

When does a set of three measurements can represent a triangle?

A set of measurements can represent a triangle if the sum of the two smaller measurements is greater than the greater measures.

The measurements in this triangle are given as follows:

Smallest: 12 meters.

Largest: 22.8 meters.

If he orders a duplicate of the largest measurement, the smallest measurement would be the base of the isosceles triangle, meaning that it would be an acute isosceles triangle.

Then he should order a duplicate of the smallest measurement, of 12 meters, as then they would be the sides between the obtuse angle of the isosceles triangle.

Answer:

Option C

The first two hours cost $4. Between two hours and six hours cost $2 per hour, and all hours after that cost $1.

Step-by-step explanation:

From the first part of the graph we can see that there is a flat rate of $4 for the first two hours. So the first two hours cost $4.

We can eliminate options A and B leaving C and D as only possible options.

Look at the second part of the graph

Between 2 hours and 6 hours(difference of 4 hours), the cost increases from $4 to $8 or an increase of $8

So rate per hour is $8/4 = $ 2 per hour between 2 hours and 6 hours

This information alone is enough to eliminate D but let's go to the rate beyond 6 hours just to make sure. This is the third part of the graph

Between 6 and 7 hours (1 hour) we can see the cost goes from $12 to $13 or a difference of $1. This means for every hour after 6 hours, the rate is $1 per hour.

So option C is the correct choice

The amount of flour he get in per dollar will be;

⇒ 1.625 dollars

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

Pablo bought 13 pounds of flour for $8.

Now,

Since, Pablo bought 13 pounds of flour for $8

Hence, The amount of flour he get in per dollar = 13/8

                                                                          = 1.625 pounds

Thus, The amount of flour he get in per dollar will be;

⇒ 1.625 dollars

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The probablity that the two balls are orange and blue is 1/8

Describe Probability:

This is the chance or likelihood that an event will take place.

One orange ball, one yellow ball, and two blue balls are there in a bag.

The total number of sample space  or outcome can be given as

Total outcome = 1 + 1 + 2=4

Probablity of occouring an orange ball  can be given as, 1/4

Probablity of occouring a blue ball  can be given as, 2/4

Probablity of an orange ball and a blue ball = 1/4 * 2/4

Probablity of an orange ball and a blue ball = 1/8

Consequently, there is a 1/8 chance that the two chosen balls are orange and blue

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Answer: B. ( - ∞ , 1 ) U ( 1, 2]

Step-by-step explanation:

The equation of H(x) is [tex]\frac{\sqrt{2-x} }{x-1}[/tex]

For the bottom denominator, x-1 cannot equal zero

x-1=0

x=1

For the numerator, 2-x square root has to be greater or equal to zero.

[tex]2-x\geq 0[/tex]

[tex]x\leq 2[/tex]

so the domain is

( - ∞ , 1 ) U ( 1, 2]

The number of cows are 9 and the number of chickens are 13.

Given that, a farm has 22 cows and chicken altogether.

A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently.

Let the x be the number of cows and y be the number of chicken.

Now, x+y=22 -------(I)

The farmer counted 62 legs total.

So, 4x+2y=62 -------(II)

Multiply equation (I) by 2, we get

2x+2y=44 -------(III)

Subtract equation (III) from equation (II), we get

4x+2y-(2x+2y)=62-44

⇒ 2x=18

⇒ x=9

Substitute x=9 in equation (I), we get

9+y=22

⇒ y=13

Hence, the number of cows are 9 and the number of chickens are 13.

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The number of cans of soup purchased and the number of frozen dinners purchased are 8 and 3 respectively.

A system having more than two equations is known as a system of equations.

Given that, the can of soup contains 350 mg of sodium and the frozen dinner contain 650 mg of sodium.

Let the numbers of cans of soups and frozen dinners purchased be s and f, then,

s + f = 11

s = 11-f       (1)

The total sodium in all 11 cans is 4750 mg which can be expressed as:
350s + 650f = 4750

Substitute s = (11-f) into the above equation:

350(11 - f) + 650f = 4750

3850 - 350f + 650f = 4750

300f = 4750 -3850

300f = 900

f = 3

Substitute f = 3 into equation (1):

s = 11-3

s = 8

Hence, the number of cans of soup purchased and the number of frozen dinners purchased are 8 and 3 respectively.

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Answer: a=33

Step-by-step explanation:

Answer:

a=33

Step-by-step explanation:

1. Multiply both sides of the equation by 11

231=6a+33

2. Move 6a to the left side by subtracting

231-6a=33

3. Move 231 to the right side by subtracting

-6a=33-231

4. Find the difference

-6a=-198

5. Divide -6 on both sides to get "a" by itself

a=33

From the expression, when simplified, (1)   16a+b  (2) 17b+11a (3) 17b.

An algebraic expression is an expression built up from integer constants, variables, and the algebraic operations.

The given algebraic terms are

3a+b+13a

Collect the like terms

3a+13a+b

Add the like terms

16a+b

Therefore, 3a+b+13a matches 16a+b

20b+11a-3b

Collect like terms

20b-3b+11a

=17b+11a

Therefore, 20b+11a-3b matches 17b+11a

20b-5b+2b

All the terms are alike, therefore do the arithmetic operation

15b+2b

=17b

Therefore, 20b-5b+2b matches 17b

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Answer:

x = 7

Step-by-step explanation:

x(XY) = 6(WX)

x(x + 11) = 6(6 + 15)

x² + 11x = 126

x² + 11x - 126 = 0

126 = 7 × 18

(x + 18)(x - 7) = 0

x + 18 = 0   or   x - 7 = 0

x = -18   or   x = 7

We discard the negative answer.

x = 7

Answer:

(-10) - (-16) = 6

Step-by-step explanation:

the height of 4.6 units when the trapezoid's area is 70 units and its first and second bases are

Area is a mathematical concept that expresses the size of a region on a planar or curved surface. A shape's "space enclosed within the perimeter or the boundary" is referred to as its area. Math formulas are used to determine the area of various forms.

given

area of the trapezoid is 70 units

and the 1st base = 20 units and 2nd base = 10 units

length CE ?

area of trapezoid = 1/2( b1 + b2)*h

70= 1/2 (20 + 10 )*h

70 = 1/2(30)*h

h = 4.6 units

the height of 4.6 units when the trapezoid's area is 70 units and its first and second bases are

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For the given surface ;

(a) the equation of the tangent is x + y + z = 11    ,

(b) equation of normal is (x - 3) [tex]=[/tex] (y - 3) = (z - 5)   .

In the question ,

it is given that ,

the equation of the surface is 2(x-2)² + (y-1)² + (z-3)² = 10 ,

we have to find the equation of the tangent at (3,3,5) .

the partial derivative fₓ = 4(x -2)

[tex]f_{y}[/tex] = 2(y-1)   and   [tex]f_{z}[/tex] = 2(z-3) .

the partial derivatives at (3,3,5)  will be fₓ = 4(3 -2) = 4

[tex]f_{y}[/tex] = 2(3-1)  = 4   and   [tex]f_{z}[/tex] = 2(5-3) = 4  .

Part(a)  

the equation of tangent at the point (3,3,5) is

fₓ(x - x₁) + [tex]f_{y}[/tex](y - y₁) +  [tex]f_{z}[/tex](z - z₁) = 0 ,

Substituting the values form above ,

we get ,

4(x-3) + 4(y-3) + 4(z-5) = 0

4x - 12 + 4y - 12 + 4z - 20 = 0

after simplifying , we have  4x + 4y + 4z = 44 .

dividing both sides by 4 ,

we get ,

x [tex]+[/tex] y [tex]+[/tex] z [tex]=[/tex] 11  .

Part(b) ,

the equation of Normal is ;

(x-x₁)/fₓ  = (y-y₁)/ [tex]f_{y}[/tex] = (z-z₁)/ [tex]f_{z}[/tex]

(x - 3)/4 = (y - 3)/4 = (z - 5)/4

(x - 3) [tex]=[/tex] (y - 3) [tex]=[/tex] (z - 5)

Therefore , the equation of tangent is x + y + z = 11  , and equation of normal is (x - 3) = (y - 3) = (z - 5)   .

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Different arrangements of the display are possible is 2520.

Given:

the artist r. locklen jones selects 5 paintings from a collection of 7 to display in a row.

Permutation :

A permutation is an arrangement of objects in a definite order. The members or elements of sets are arranged here in a sequence or linear order.

= [tex]7_P_5[/tex]

we know that,

[tex]n_P_r[/tex] = n! / ( n - r ) !

[tex]7_P_5[/tex] = 7! / ( 7 - 5 ) !

= 7! / ( 2 ) !

= 7! / 2!

= 7 * 6 * 5 * 4 * 3 * 2! / 2!

= 42 * 20 * 3

= 840 * 3

= 2520

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Answer:12

Step-by-step explanation:

the whole distance containing all three points will be AC, and we know that AC = 72 km, now point B is between splitting the AC segment into AB and BC to a 4 : 5 ratio.

well, hell for that let's simply grab the total amount of 72 and split it up by dividing it by (4 + 5) and distribute accordingly.

[tex]A\stackrel{\text{\LARGE 4}}{\rule[0.35em]{10em}{0.25pt}} B\stackrel{\text{\LARGE 5}}{\rule[0.35em]{14em}{0.25pt}} C \\\\\\ \stackrel{AB}{4}~~ : ~~\stackrel{BC}{5} ~~ \implies ~~ \stackrel{AB}{4\cdot \frac{72}{4+5}}~~ : ~~\stackrel{BC}{5\cdot \frac{72}{4+5}} \\\\\\ \stackrel{AB}{4\cdot 8}~~ : ~~\stackrel{BC}{5\cdot 8} ~~ \implies ~~ \stackrel{AB}{\text{\LARGE 32}}~~ : ~~\stackrel{BC}{40}[/tex]