A circle has an area of 40 square meters. Which answer is closest to the measure of its diameter?
A.1.8 meters
B.4 meters
C.3.6 meters
D.7.1
Answer:
Option D. [tex]7.1\ m[/tex]
Step-by-step explanation:
we know that
The area of a circle is equal to
[tex]A=\pi r^{2}[/tex]
In this problem we have
[tex]A=40\ m^{2}[/tex]
substitute and solve for r
[tex]40=\pi r^{2}[/tex]
[tex]r^{2}=40/( \pi)[/tex]
[tex]r=3.57\ m[/tex]
Multiply the radius by [tex]2[/tex] to obtain the diameter
so
[tex]3.57*2=7.14\ m[/tex]
If apples are on sale at 15 for $3, what’s the cost of each apple?
A. 50 cents
B. 25 cents
C. 20 cents
D. 30 cents
(I answered A originally but It was wrong. Please explain why it was wrong, do I need to put the decimals down? I'm really bad at this please help me! Thank you.
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The cost of each apple will be 20 cents per apple. Then the correct option is C.
What are ratio and proportion?A ratio is a collection of ordered integers a and b represented as a/b, with b never equaling zero. A proportionate expression is one in which two items are equal.
Conversion means to convert the same thing into different units.
If apples are on sale at 15 for $3.
We know that $1 = 100 cents
Then the number of the cents in 3 dollars will be
⇒ 3 x 100
⇒ 300 cents
Then the cost of each apple will be the ratio of the 300 cents and 15 apple.
⇒ 300 / 15
⇒ 20 cents per apple
Thus, the cost of each apple will be 20 cents per apple.
Then the correct option is C.
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What is the sum of (7x-6y) and (x+y)
Tim's age is two thirds of sara's age. sara's age is three fifths of mark's age. mark is 9 years older than tim. how old is sara? answer
If you double Lucien’s age and then subtract 6, you get Paul’s age. 2 years ago the sum of their ages was 29. How old is each person?
Answer:
Step-by-step explanation:
Evaluate faith’s check register
How many x intercepts appear on the graph of this polynomial function?
Answer:
B) 2 x-intercepts
Use the image
A) 6
B) 36
C) –6
D) –36
Please explain your answers.
Thanks! : )
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Rachel pays $131.44 for a desk, including tax. The task is 31 cents less than 1*16 the desk’s price. What is the price for the desk before adding the tax?
Answer:
The cost of the desk is 124 dollars.
Step-by-step explanation:
irst, change this into an equation
tax=1/16x-.31
x equals the cost of the desk without tax:
x+tax=131.44
tax=131.44-x
Set the first equation equal to the second:
1/16x-.31=131.44-x
Solve for x:
17/16x=131.75
x=$124
Hope that helps
The equivalent percentage value for the decimal number 1.16 is 116% which is obtained by multiplying the decimal by 100. Before including the tax the price of the desk was $60.99.
What is percentage?A percentage is a value that indicates 100th part of any quantity.
A percentage can be converted into a fraction or a decimal by dividing it by 100.
And to convert a fraction or a decimal into percentage, they are multiplied by 100.
Given that,
The amount paid by Rachel for a desk is $131.44.
Suppose the price of desk is before adding the tax is x.
Then, as per the problem the following expression can be written for the tax amount as,
1.16x - 0.31
Now, the expression for the price of desk after tax is,
x + 1.16x - 0.31 = 131.44
⇒ 2.16x = 131.44 + 0.31
⇒ 2.16x = 131.75
⇒ x = 131.75 / 2.16
⇒ x = 60.99
Hence, the price for the desk before adding the tax is $60.99.
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what are the properties of real numbers?
Final answer:
The properties of real numbers include closure, commutative, associative, identity, and inverse properties. These properties govern how real numbers behave in addition and multiplication operations.
Explanation:
The properties of real numbers refer to the characteristics and behavior of numbers that belong to the real number system. The real number system includes all rational and irrational numbers, such as whole numbers, integers, fractions, decimals, and square roots.
The properties of real numbers include:
Closure property: The sum or product of any two real numbers is also a real number. For example, the sum of 3.14 and 4 is 7.14, which is a real number.Commutative property: The order of addition or multiplication does not affect the result. For example, 2 + 3 is equal to 3 + 2, and 2 × 3 is equal to 3 × 2.Associative property: The grouping of real numbers in addition or multiplication does not affect the result. For example, (2 + 3) + 4 is equal to 2 + (3 + 4), and (2 × 3) × 4 is equal to 2 × (3 × 4).Identity property: The sum of a real number and zero is equal to the number itself. For example, 2 + 0 is equal to 2. The product of a real number and one is equal to the number itself. For example, 3 × 1 is equal to 3.Inverse property: Every real number has an additive inverse and a multiplicative inverse. The additive inverse of a real number is the number that, when added, gives zero as the result. For example, the additive inverse of 5 is -5, as 5 + (-5) = 0. The multiplicative inverse of a non-zero real number is the number that, when multiplied, gives one as the result. For example, the multiplicative inverse of 2 is 1/2, as 2 × (1/2) = 1.These properties of real numbers are fundamental in algebraic operations and calculations. They provide a basis for solving equations, simplifying expressions, and working with mathematical concepts.
Finish the steps below to write a quadratic function for the parabola shown. Use the vertex form, f(x) = a(x – h)2 + k, and substitute in the values for h and k. f(x) = a(x – 5)2 + 3 Use another point and substitute in values for x and f(x). Solve for a. 5 = a(6 – 5)2 + 3 Write the function, using the values for h, k, and a. The function is f(x) = (x – )2 + .
Here we want to write the quadratic function for the parabola shown in vertex form.
We will get the function: f(x) = 2*(x - 5)^2 + 3
So the general function of a parabola with vertex (h, k) and leading coefficient a is:
f(x) = a*(x - h)^2 + k
Here, we know the formula:
f(x) = a*(x - 5)^2 + 3
where:
h = 5k = 3So the vertex is the point (5, 3), and we only must find the value of a to completely determine the parabola's function
We also know that:
f(6) = 5
So we can solve:
5 = a*(6 - 5)^2 + 3
5 = a*(1)^2 + 3
5 = a + 3
5 - 3 = a = 2
So we just found the value of a, replacing this on the parabola's function we get:
f(x) = 2*(x - 5)^2 + 3
If you want to learn more about parabolas, you can read:
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Input in standard form the equation of the given line. The line with m=1/2 and b=3
Final answer:
To find the equation of a line with a given slope and y-intercept in standard form, substitute the values of the slope and y-intercept into the equation y = mx + b.
Explanation:
To write the equation of a line given the slope m and y-intercept b in standard form y = mx + b, you can directly substitute the values of m = 1/2 and b = 3 into the equation.
Substitute m = 1/2 and b = 3 into y = mx + b: y = (1/2)x + 3
Therefore, the equation of the line in standard form is y = (1/2)x + 3.
What is the discriminant D of the equation?
a^2-2a+5=0
Enter your answer:
D=___
Please help! Thank you to who knows how to do this. You WILL be rewarded.
I added more CORRECT answers for everybody. Your answer is in the last pic.
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Find the volume of a box that will hold nine 9.425 cm3 cylindrical containers that each measure 3 centimeters long. (round to nearest whole number)
Final Answer:
The volume of the box that will hold nine 9.425 cm³ cylindrical containers, each measuring 3 centimeters long, is approximately 108 cm³.
Explanation:
First, we need to find the radius of each cylindrical container since we have its volume and the length. The volume V of a cylinder is given by the formula:
[tex]\[ V = \pi r^2 h \][/tex]
where r is the radius and h is the height (or length) of the cylinder. We are given:
[tex]\[ V = 9.425 \text{ cm}^3 \\\\\[ h = 3 \text{ cm} \][/tex]
We need to solve for r:
[tex]\[ 9.425 = \pi r^2 (3) \\\\\[ r^2 = \frac{9.425}{3\pi} \\\\\[ r^2 = \frac{9.425}{3 \times 3.14159} \\\\\[ r^2 = \frac{9.425}{9.42477} \\\\\[ r^2 \approx 1 \\\\\[ r \approx 1 \text{ cm} \][/tex]
Now we know the radius of one cylindrical container is approximately 1 cm. Although this rounding might lead to a slightly inaccurate result, we'll proceed with this approximation for simplicity's sake.
Since each container is a cylinder with a radius of 1 cm, the diameter of each container is [tex]\( 2 \times 1 = 2 \)[/tex] cm. If we wanted to pack these containers without any wasted space in one layer, we would arrange them in a 3 by 3 grid, given there are 9 containers. The length and the width of the box would then each be 3 times the diameter of one container.
Hence:
Length of box = Width of box = [tex]\( 3 \times 2 \)[/tex] cm = 6 cm.
The height of the box would be equal to the length of one of the containers, which is 3 cm.
Now we can find the volume of the box:
Volume of box [tex]\( V_{\text{box}} \) = Length \( \times \) Width \( \times \) Height[/tex]
[tex]\[ V_{\text{box}} = 6 \text{ cm} \times 6 \text{ cm} \times 3 \text{ cm} \\\\\[ V_{\text{box}} = 36 \text{ cm}^2 \times 3 \text{ cm} \\\\\[ V_{\text{box}} = 108 \text{ cm}^3 \][/tex]
Rounding to the nearest whole number, the volume of the box that will hold nine 9.425 cm³ cylindrical containers, each measuring 3 centimeters long, is approximately 108 cm³.
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Answer:
D
Step-by-step explanation:
please help thank you.
A prism is completely filled with 1120 cubes that have edge lengths of 1/2 in. What is the volume of the prism? Enter your answer in the box. in³
A plane requires 3300 gallons of fuel and 75 minutes to make a round trip to Prague, and it takes 5700 gallons of fuel and 130 minutes to make a round trip to Stockholm. A pilot is asked to use at least 94500 gallons of fuel and spend at least 2400 minutes to make round trips to Prague and Stockholm in his plane. Let P denote the number of round trips to Prague and S the number of round trips to Stockholm. Write an inequality that represents the condition based on the number of gallons of fuel. Write an inequality that represents the condition based on the number of minutes.
Answer: The inequality that represents the condition based on the number of gallons of fuel will be:
[tex]3300P +5700S \geq94500[/tex]
The inequality that represents the condition based on the number of minutes will be:
[tex]75P +130S\geq2400[/tex]
Step-by-step explanation:
Let P denote the number of round trips to Prague and S the number of round trips to Stockholm.
Since the plane requires 3300 gallons of fuel and 75 minutes to make a round trip to Prague and 5700 gallons of fuel and 130 minutes to make a round trip to Stockholm.
Then the inequality that represents the condition based on the number of gallons of fuel will be:
[tex]3300P +5700S \geq94500[/tex]
The inequality that represents the condition based on the number of minutes will be:
[tex]75P +130S\geq2400[/tex]
The tables below represent the profits earned by a merchandiser from four new consignments of t-shirts. Each consignment contained t-shirts of five different sizes. If we were to plot each of the t-shirt sizes and the profit earned on each new size, we would get a different graph for each consignment. Almost all the graphs showed some association between the two variables, except one consignment, which showed no association. Which of the following consignments shows no association?
In graph 2, the dots are scattered and also no association.
What is an association?
An association (relationship) between two numerical variables can be described by its form, direction, strength, and outliers. A scatter plot shows the association between two variables. A scatter plot matrix shows all pairwise scatter plots for many variables.
For the given situation,
There are four new consignments of t-shirts.
Each consignment contained t-shirts of five different sizes.
Graph is plotted as shown below between each of the t-shirt sizes and the profit earned on each new size.
If one variable increases as the other variable increases, there is said to be a positive association.
Two variables have a negative association when the values of one variable tend to decrease as the values of the other variable increase.
No association means that there is no line and all the dots are scattered.
From the graph shown, in graph 2 the dots are scattered. Thus no association.
Hence we can conclude that in graph 2, the dots are scattered and also no association.
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The perimeter of a rectangle is 54cm. The area of the same rectangle is 176 cm^2. What are the dimensions of the rectangle?
A. 11 cm by 16 cm
B. 8 cm by 22 cm
C. 5.5 cm by 32 cm
D. 4 cm by 44 cm
Given is rectangle with perimeter = 54 centimeters and area = 176 squared centimeters.
Let's consider the length of rectangle = L and width of rectangle = W.
We know the following formulas for rectangle :-
Perimeter = 2 x (L + W)
Area = L x W
So we have 2 x (L + W) = 54 and L x W = 176.
L + W = 27 and L x W = 176
We need to find two positive integers such that their sum is 27 and product is 176.
Using trial and error, we have two such positive integers such that 11 + 16 = 27 and 11 x 16 = 176.
So, the dimensions of rectangle would be 11cm x 16cm.
Hence, option A is correct i.e. 11 cm by 16 cm.
The 1997 value of an object was $9500. In 2012, it was worth $5000. The annual percent of decay has been constant. What is the annual percent of decay? A) 1.19% B) 2.19% C) 3.19% D) 4.19%
a rope is sq rt. 250 units long. If cut into 2 pieces so that the lengths of the pieces are in the ratio of 3:2 what is the length of longer piecein simplest radical form? 3:2 =5/3(?) Do i set x/sq.rt.250=5/3? I end up with 25 sq rt. 10/3. This isn't correct.
Let 3x = the length of the first rope
2x = the length of the second rope
This representation is based on the given that the ratio of the two ropes is 3:2.
3x + 2x = sq rt. 250
5x = sq rt. 250
x = sq rt. 250 / 5
x = sq rt. 25(10) / 5
x = 5 sq rt. 10 /5
The five would be cancelled resulting to:
x =sq rt. 10
Which of the following units represents the surface area of a solid?
inches
square inches
cubic inches
quartic inches
Answer:
Option B is correct.
Step-by-step explanation:
We are given units.
we have to find unit that represents the surface area of a solid.
We know that unit of area is square unit.
⇒ Unit for surface area is also square unit.
inches is a unit of a length.
square inches is unit of area
cubic inches is unit of volume
quadratic inches does not exist as unit.
Therefore, Option B is correct.
Write an expression to represent: One more than the quotient of a number x and 4.
9514 1404 393
Answer:
x/4 +1
Step-by-step explanation:
The quotient of a number (x) and 4 is written ...
x/4
One more than that is ...
x/4 +1
What is the projection of (3,4) onto (3,1)?
the answer can also be written as 1.3(3,1)
Which of the following are opposite rays?
A. TV and TS
B. TX and TL
C. TS and TX
D. TL and TV
The correct answer is:
B. TX and TL
Explanation:
Opposite rays are rays that have the same endpoint and extend in opposite directions. The ones in the diagram that fit this description are TX and TL.
Annabella spends $2.25 per gallon on gas at the gas station. After driving a certain distance, she stops at a second gas station and spends $2.15 per gallon on gasoline. Annabella can express her average cost per gallon of gasoline as 2.25x+2.15(x+5)/2x+5 .
Answer:
THE NUMERATOR OF THE RATIONAL EXPRESSION REPRESENTS THE TOTAL COST OF GASOLINE PURCHASED.
THE DENOMINATOR OF THE RATIONAL EXPRESSION REPRESENTS THE TOTAL GALLONS OF GASOLINE PURCHASED
The complete problem is:
Annabella spends $2.25 per gallon on gas at the gas station. After driving a certain distance, she stops at a second gas station and spends $2.15 per gallon on gasoline.
Annabella can express her average cost per gallon of gasoline as [tex]y = \frac{(2.25x + 2.15(x+5))}{2x+5}[/tex]
What is the meaning of the parts of this rational expression in the context of the situation?
THE NUMERATOR OF THE RATIONAL EXPRESSION REPRESENTS THE __________.
(select one)
1. total cost of the gasoline purchased
2. total number of gallons of gasoline purchased
3. cost per gallon of gasoline
THE DENOMINATOR OF THE RATIONAL EXPRESSION REPRESENTS THE ________.
1. total cost of the gasoline purchased
2. total number of gallons of gasoline purchased
3. cost per gallon of gasoline
So, in this context and based on the given data, the numerator of the expression is referring to the total cost of gasoline purchased, and the denominator is expressing the total gallons of gasoline purchased.
You can deduct this because, the numerator contains the amounts of costs per gallon, being x gallons. On the other hand, you can see in the denominator that there's no costs multiplying the variable, it's just a quantity which refers to the amount of gasoline, not the cost.
Given that (-8,-5) is on the graph of f(x), find the corresponding point for the function f(x-2)
Answer:
(3,-8)
Step-by-step explanation: