Vanessa has scored 45, 32, and 37 on her three math quizzes. She will take one more quiz and wants a quiz average of at least 40. What is the minimum score Vanessa needs to earn on her fourth quiz?

Answer:

Option (c) is correct.

The system is Inconsistent.

Step-by-step explanation:

Given : A pair of lines.

We have to identify the system by type.

Consider the given system of pairs of lines.

Since, the graph shows two parallel lines.

1) Consistent :  A system of linear equation is said to be consistent if the graph of equation either intersect at a single point or two lines overlap each other.

that is a unique solution or infinite many solution.

2) equivalent :  When two system of equations have same solution then the two system are said to be equivalent.

3) Inconsistent : A system of linear equation is said to be inconsistent if the graph of equation are parallel to each other.

Thus, the given graph shows parallel lines,

Hence, The system is Inconsistent

A

first option is correct

Final answer:

To find the scale factor for enlarging a children's book from 20 cm by 24 cm to 25 cm by 30 cm, divide the enlarged dimension by the original corresponding dimension, resulting in a scale factor of 1.25.

Explanation:

We are asked to find the scale factor used to enlarge a children's book from dimensions of 20 cm by 24 cm to a larger version with dimensions of 25 cm by 30 cm. To find the scale factor, we need to divide one dimension of the enlarged book by the corresponding dimension of the original book. We can take either the length or the width to find the scale factor.

Let's use the width for this example:

Original width = 20 cm
Enlarged width = 25 cm

Scale factor = Enlarged width / Original width
Scale factor = 25 cm / 20 cm

Scale factor = 1.25

Therefore, a scale factor of 1.25 should be used to enlarge the book from the original dimensions to the new dimensions.

To solve for b in the equation A = (a + b + c) / 3, multiply both sides by 3 and then subtract a and c from both sides. The correct answer is A) 3A - a - c = b.

To solve for b in the equation A = (a + b + c) / 3, you need to isolate the variable b.

First, multiply both sides of the equation by 3 to eliminate the denominator:

3A = a + b + c

Then, subtract a and c from both sides to get b by itself:

3A - a - c = b

So, the correct answer is:

A) 3A - a - c = b

Let

[tex]a=2\ in\\b=4\ in\\c=5\ in[/tex]

we know that

If [tex]c^{2} =a^{2}+b^{2}[/tex] -----> is a right triangle

If [tex]c^{2} > a^{2}+b^{2}[/tex] -----> is an obtuse triangle

If [tex]c^{2} < a^{2}+b^{2}[/tex] -----> is an acute triangle

so

substitute the values

[tex]5^{2} > 2^{2}+4^{2}[/tex] ------> is an obtuse triangle

therefore

the answer is

The triangle is not acute because [tex] 2^{2}+4^{2}< 5^{2}[/tex]

Answer:  The correct option is

(C)  The triangle is not acute because 2² + 4² < 5².

Step-by-step explanation:  We are to select the statement that best explains the type of the triangle having lengths of three sides as 2 inch, 5 inch and 4 inch.

We know that a triangle with side lengths a, b and c (c > a, b)is

(i) an acute-angled if a² + b² > c², and

(ii) an obtuse-angled if a² + b² < c².

For the given triangle,

a = 2 inch, b = 4 inch  and  c = 5 inch.

So, we have

[tex]a^2+b^2=2^2+4^2=4+16=20,\\\\c^2=5^2=25.[/tex]

Since,

[tex]20<25\\\\\Rightarrow a^2+b^2<c^2,[/tex]

so the given triangle is not acute, but obtuse.

Thus, the triangle is not acute because 2² + 4² < 5².

Option (C) is correct.

Answer:

Hence, Option: C is correct.

The term that does not describe polygon A'B'C'D' is:

Pre-image.

Step-by-step explanation:

Clearly we could observe that the polygon A'B'C'D' is the image that is obtained by the applying some transformation to the polygon ABCD.

The transformation that is applied to ABCD to obtain A'B'C'D' is:

Rotating the figure anticlockwise 90° and then translating it 7 units to the  left and 1 unit downward.

Hence, Polygon A'B'C'D' is not a pre-image.

Since it is an image which is formed or obtained by applying required transformation to the pre-image ABCD.

The correct option is C) preimage. Polygon [tex]\(A'B'C'D'\)[/tex] is the image of the transformation, not the preimage.

To determine which term does not describe polygon [tex]\(A'B'C'D'\)[/tex], we need to understand the definitions of each term in the context of transformations in geometry:

Rotation : This is a type of transformation that turns a figure around a fixed point at a certain angle. Polygon [tex]\(A'B'C'D'\)[/tex] could be a result of rotating polygon [tex]\(ABCD\)[/tex]  

Image : The image is the result of applying a transformation to a figure. [tex]A'B'C'D'\)[/tex] is the image of [tex]\(ABCD\)[/tex] after some transformation.

Preimage : The preimage is the original figure before a transformation is applied. In this context, [tex]\(ABCD\)[/tex] is the preimage, not [tex]\(A'B'C'D'\)[/tex]

Transformation : This is a general term that refers to any operation that moves or changes a figure in some way to produce a new figure. The process that produced [tex]\(A'B'C'D'\)[/tex] from [tex]\(ABCD\)[/tex] is a transformation.

From these definitions, the term that does not describe polygon [tex]\(A'B'C'D'\)[/tex] is preimage.

To determine the side length of a Rubik's cube with a volume of 384 cubic centimeters, take the cube root of 384 to find that each side is approximately 7.24 centimeters long.

To find the length of one side of a cube when given the volume, you can use the formula for the volume of a cube, which is V = L³, where V is the volume and L is the length of a side of the cube.

In this case, the volume is 384 cubic centimeters, so we need to find the cube root of 384 to find the length of one side.

The calculation is as follows:

Therefore, each side of the Rubik's cube is approximately 7.24 centimeters long.

B) 25, 650 ft^2

If the ratio is 1:15, then the measurements of each side of the actual gym are 15 times greater than the scale's. So the areas would have a ratio of 1:225. 114 times 225 is equal to 25, 650

Answer:

90 mph

Step-by-step explanation:

Let speed of  both train=x mph

Time taken by train A to reach station A=[tex]2\frac{1}{2}[/tex] hr=\frac{5]{2} h[/tex]

Time taken by train B to reach station B=4 h

Distance between two trains=585 miles

We know that

Distance=[tex] speed\times time[/tex]

Distance covered by train A=[tex]\frac{5}{2} x[/tex]

Distance covered by train B=[tex]4x[/tex]

When two trains travel in opposite direction then total distance

[tex]\frac{5}{2}x+4x=585[/tex]

[tex]\frac{5x+8x}{2}=585[/tex]

[tex]\frac{13}{2}x=585[/tex]

[tex]x=585\times \frac{2}{13}=90 mph[/tex]

Hence, the rate of both trains=90 mph

Answer:

The answer is : $67,266.16

Step-by-step explanation:

This question is a future value question.

As given, Trent puts away 10% of his $32,000 every year and the company will put half amount of $1,600. So, total amount becomes =[tex]3200+1600=4800[/tex] each year.

Formula for future value or FV is Fv = Pmt (1 + r/n)^(nt) – 1 / (r/n)

Where, Fv = Future Value , Pmt = repeated payments , R = interest rate ,N = total number of payment periods

Putting the values in the formula,

Fv = 4800 (1 + 0.073/1)^(1x10) – 1 (0.073/1)

Fv = $67266.16

Hence, the answer is $67266.16

The amount saved in 10 years is [tex]\boxed{\$ 67266.20}.[/tex]

Further Explanation:

Annuity is a series of payment that is made after equal interval of time.

Future value of annuity of payment P for n year if the return is i can be expressed as,

[tex]\boxed{{\text{Future Value}} = {\text{P}} \times \frac{{{{\left( {1 + \frac{i}{n}} \right)}^{nt}}}}{{\frac{i}{n}}}}[/tex]

Given:

Total salary is [tex]\$ 32000.[/tex]

The interest rate is [tex]7.3\%.[/tex]

Trent save [tex]10\%[/tex] of his salary every year.

Company puts [tex]5\%[/tex] of salary every year.

Calculation:

The [tex]10\%[/tex] of [tex]\$32000[/tex] can be calculated as follows,

[tex]\begin{aligned}{\text{Amount}}&= \frac{{10}}{{100}} \times 32000\\&= \$ 3200\\\end{aligned}[/tex]

The amount that company put can be obtained as follows,

[tex]\begin{aligned}{\text{Company Amount}} &= \frac{5}{{100}} \times 32000\\&= \$ 1600\\\end{aligned}[/tex]

The total amount can be calculated as follows,

[tex]\begin{aligned}{\text{Amount}} &= 3200 + 1600\\&= \$ 4800\\\end{aligned}[/tex]

The future value can be obtained as follows,

[tex]\begin{aligned}{\text{FV}} &= 4800 \times \frac{{{{\left( {1 + 0.073} \right)}^{10}} - 1}}{{0.073}} \\ &= 4800 \times 14.014\\&= \$ 67266.20\\\end{aligned}[/tex]

Hence, the amount saved in 10 years is [tex]\boxed{\$ 67266.20}.[/tex]

Learn more:

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Investment and return

Keywords: Trent, 25 years old, works, company, matches, 401(k), 7.3%, 10%. $32000, salary, every year, 10 years, amount, 5%, nearest cent.

Answer:

Option B is correct

The average rate of change of d(t) between 2 second and 4 second is; 90 ft/s

and it represents the average speed of the object between 2 seconds and 4 seconds.

Step-by-step explanation:

Average rate of change of function is defined as the ratio of the difference in the function f(x) as it changes from a to b to the difference between a and b. Then, the average rate of change is denoted as A(x).

[tex]A(x) =\frac{f(b)-f(a)}{b-a}[/tex]

As per the given statement, the distance d(t) is in feet and t is the time in second.

To find the average rate of change of d(t) between 2 seconds and 4 seconds.

From the table we have;

at t = 2 , d(2) = 60

and

at t =4 , d(4) = 240.

Then, by the definition of average rate of change ;

[tex]A(t) = \frac{d(4)-d(2)}{4-2}[/tex] = [tex]\frac{240-60}{4-2} =\frac{180}{2}[/tex]

Simplify:

[tex]A(t) = 90 ft/s[/tex]

therefore, the average rate of change of d(t) between 2 second and 4 second is; 90 ft/s and it represents the average speed of the object between 2 seconds and 4 seconds.

F = 32,000 (1+ 0.061*10)

F = 51,520

That makes the total interest equal 51,520 -32,000 = 19, 520.