Answer:
-1
-Step-by-step explanation:
Which of the following pairs could be reasonable approximations for the diameter and circumference of a circle? 18 inches and 57 inches 3 centimeters and 28 centimeters 33 meters and 80 meters
Answer:
18 inches and 57 inches
Step-by-step explanation:
The diameter and the circumference of a circle are proportionate to each other.
The circumference of a circle will always be the diameter times [tex]\pi[/tex]. We know this because the circumference of a circle is represented as
[tex]2 \pi r[/tex]
Since the diameter is twice the radius, we multiply the radius by 2 - there's already a [tex]\cdot 2[/tex] in this equation, so [tex]c = \pi d[/tex].
1st option: [tex]18\cdot3.14 = 56.52[/tex], this is close to 57 so it's reasonable.
2nd option: [tex]3\cdot 3.14 = 9.42[/tex], this isn't close to 28 at all.
3rd option: [tex]33 \cdot 3.14 = 103.62[/tex], this isn't close to 80 at all.
So the 1st option is reasonable.
Hope this helped!
Answer:
First option: 18 inches diameter, 57 inches circumference
Step-by-step explanation:
Circumference of a circle is...
2 * radius * pi
We can approximate pi (3.14159...) to 3.
So the circumference of a circle is approx.
2 * radius * 3
We know the diameter of a circle is 2 times the radius...
diameter = 2 * radius
Thus, the circumference of a circle is approximately...
diameter * 3
First option:
Diameter 18, circumference 57
Let's try our approximation
18 * 3 = 54
We see that 57 is pretty close and is a reasonable approximation.
Second option:
Diameter 3, circumference 28
3 * 3 = 9
Not even close to 28.
Third option:
Diameter 33, circumference 80
3 * 33 = 99
Closer, but much further off than our first option.
let a and b be positive integers. 23^a x 23^b
Answer:
23 ^ ( a+b)
Step-by-step explanation:
23^a *23^b
Since the bases are the same, we can add the exponents
23 ^ ( a+b)
Answer:
23^(a+b)
Step-by-step explanation:
A^x*A^y = A^(x+y)
you can think of it like this
A^x = A*A*A*.......*A x times
A^y = A*A*A*....*A y times
therefore A^x * A^y = A*A*A*...*A (x+y) times
=A^(x+y),
so in our case A = 23, and x and y were a and b, so 23^a * 23^b = 23^(a+b)
HELP!! The side of a square is 3 raised to the 5/2 power inches. Using the area formula A = s squared, determine the area of the square.
Answer:
3^5/2 is 15.5885.
Step-by-step explanation:
This is plug in math! I'd recommend to get a Ti-84 (makes math like this so much easier)
Answer:
243 square inches
Step-by-step explanation:
The area is the square of the side length:
A = s^2
A = (3^(5/2))^2 = 3^(5/2*2) = 3^5 = 243
The area of the square is 243 square inches.
_____
The relevant rule of exponents is ...
(a^b)^c = a^(bc)
find the distance between each pair of points. round to the nearest tenth (-8,-2) and (6,-1)
Answer: 14
Step-by-step explanation:
To find the distance, find the difference in the x and y values,square them and add them. Then finally find the square root of the number you got after adding them together.
-2-(-1)= -1
-8 -6 = -14
-14^2 + -1^2 = d^2 where d is the distance
196 + 1 = d^2
197 = d^2
d= [tex]\sqrt{197}[/tex]
d= 14.0356 rounded to the nearest tenth is 14.
A scuba diver was 53 below the oceans surface. If he rises 25 feet, what is hte new depth?
Answer:
28 ft below the surface.
Step-by-step explanation:
A scuba diver was 53 below the oceans surface. If he rises 25 feet, what is the new depth?
You subtract 25 ft from 53 ft leaving you with 28 ft.
53 ft
- 25 ft
28 ft below the surface
Hope this helps.
Identify the property that justifies the statement: If 3x=-21, then x=-7.
Consider a function that describes how a particular car’s gas mileage depends on its speed. What would be an appropriate domain for this function? 0 to 100 miles per hour 0 to 50 miles per gallon times from 0 to 10 minutes times from –10 to 10 minutes
Answer:
0 to 100 miles
Step-by-step explanation:
Trust me I know say thanks ppl
An altitude of a three-dimensional object is best described as option D, "a segment that is perpendicular to the planes containing the two bases."
What is 3d geometry?3D geometry is the study of shapes in 3D space using three coordinates: x-coordinate, y-coordinate, and z-coordinate. To discover the exact location of a point in 3D space, three criteria are required.
An altitude is a line segment drawn from a vertex of a three-dimensional object (such as a pyramid or cone) that is perpendicular to the plane including the base of the object. The altitude can be used to find the height of the object, which is the distance from the vertex to the base along the altitude.
For example, in a pyramid, the altitude is a line segment drawn from the apex (the top vertex) to the center of the base that is perpendicular to the base. In a cone, the altitude is a line segment drawn from the apex to the center of the circular base that is perpendicular to the base.
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What type of parent function is this? What is the domain and range of this function? write it in interval notation
Answer:
See below.
Step-by-step explanation:
This is a parabola. Therefore, it is a quadratic parent function. The quadratic parent function is:
[tex]f(x)=x^2[/tex]
The domain of the parent quadratic function is all real numbers.
The range of the parent quadratic function is all y-values greater than or equal to 0. From the graph, we can see that the graph never goes below 0.
So, the domain in interval notation is:
[tex](-\infty,\infty)[/tex]
And the range in interval notation is:
[tex][0,\infty)[/tex]
This is interpreted as all values greater than or equal to 0.
And we're done!
If x-(-15)=23, what is the value for x?
Answer:
8
Step-by-step explanation:
When there are 2 minuses, they convert into + so that the ewuation turns into:
x+15=23
Then you move the +15 after the = sign
Now that you changed the side, you have to change sign so :
x= 23-15
x=8
1. A taxicab ride costs $1.30 plus $0.85 per mile. If the total cost of the trip
is $11.50, how many miles did the passenger travel?
Answer:
Step-by-step explanation:
the answer is 12 miles okay so subtract $1.30 from the $11.50 because that is the prize pf being in the car then the pries of a mile is $0.85 if that the case $11.50 -$1.30 would equal $10.2 and $10.2 divide $0.85 is 12 hopefully this helps
What is the value of 5k + m when k = -3 and m = -
-9?
A. -60
B. -30
C.-24
D. -6
Answer:
C. -24
Step-by-step explanation:
[tex]5k + m \\ k = - 3 \\ m = - 9[/tex]
Plug in values into the given equation
[tex]5( - 3) + ( - 9) \\ - 15 - 9 \\ = - 24[/tex]
Answer:
-24 C.
Step-by-step explanation:
I took the test and got it right
The quotient of 2 and 9
evaluate -40 divided by 5
Answer:
-9
Step-by-step explanation:
Since 5 can go into 40 9 times, the answer would be nine, but by following negative rules, since we have an odd amount of negative numbers in this equation, the answer is -9
Answer:-8
Step-by-step explanation:
5 goes into -40 8 times. 5 goes into 45 9 times.
-5(k + 6) + 7(k – 4)
Answer:
2k-58
Step-by-step explanation:
-5(k+6) + 7(k-4)
-5k-30+7k-28
2k-48
PLEASE HELP, ITS TIMED HURRY >>>>
Answer:2
Step-by-step explanation:
IM FAST RIGHT???
Answer:
A
Step-by-step explanation:
Hopefully this helps you
pls give me brainlest :)
The set of irrational numbers is the set of numbers whose decimal representations are neither (blank) nor (blank).
Answer:
neither terminating nor repeating.
Step-by-step explanation:
The set of irrational numbers is the set of numbers whose decimal representations are neither terminating nor repeating.
What are rational numbers and irrational numbers?Rational numbers are numbers which can be written in the form of [tex]\dfrac{a}{b}[/tex]where a and b are integers. Example: 1/2, 3.5 (which is writable as 7/5) etc.
Integer numbers are: ...., -2, -1, 0, 1, 2, ... (so it includes positive and negative natural number, and 0 )
Irrational numbers are those real numbers, which are not rational numbers.
Know that all natural numbers are integers, all integers are rational numbers means, natural numbers are not irrational.
The set of irrational numbers is the set of numbers whose decimal representations are neither terminating nor repeating.
Learn more about numbers here;
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Bernie is making monthly payments of $300 for a computer coding course that costs $2,500. He doesn’t need to pay any interest on the cost of the course. He started with $200 in his bank account. He plans to add $100 to his savings account every month. How many months will it take Bernie to pay off the total cost of the course using his savings?
Answer:
i believe it is 5.75 months
Step-by-step explanation:
It would take Bernie 23 months to pay off the total cost of $2500 for the course using his savings
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
Let y represent the amount of money in Bernie account after x months. Hence:
y = 100x + 200
To make $2500:
2500 = 100x + 200
x = 23 months
It would take Bernie 23 months to pay off the total cost of $2500 for the course using his savings
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0.00365 in scientific notation
2(3x” – 2)-(4x? - 4x)
What is this simplified to?
Answer:
6x-4
Step-by-step explanation:
Let's simplify step-by-step.
2(3x−2)−(4x−4x)
Distribute the Negative Sign:
=2(3x−2)+−1(4x−4x)
=2(3x−2)+−1(4x)+−1(−4x)
=2(3x−2)+−4x+4x
Distribute:
=(2)(3x)+(2)(−2)+−4x+4x
=6x+−4+−4x+4x
Combine Like Terms:
=6x+−4+−4x+4x
=(6x+−4x+4x)+(−4)
=6x+−4
Answer:
=6x−4
y=3x+12 positive or negative
Answer:
x = -4 thus negative
Step-by-step explanation:
Solve for x:
3 x + 12 = 0
Hint: | Isolate terms with x to the left hand side.
Subtract 12 from both sides:
3 x + (12 - 12) = -12
Hint: | Look for the difference of two identical terms.
12 - 12 = 0:
3 x = -12
Hint: | Divide both sides by a constant to simplify the equation.
Divide both sides of 3 x = -12 by 3:
(3 x)/3 = (-12)/3
Hint: | Any nonzero number divided by itself is one.
3/3 = 1:
x = (-12)/3
Hint: | In (-12)/3, divide 12 in the numerator by 3 in the denominator.
12/3 = (3×4)/3 = 4:
Answer: x = -4
For every pound a company spends on advertising it spends £.0.49 on it website express the amount spent on advertising to it website as a ratio in it simplest form
Answer:
1/0.49
Step-by-step explanation:
Every pound = 1 pound
And for every one of this company spends 0.49pound
To express this in a ratio is 1:0.49
Which is also 1/0.49 in fraction.
A ratio tells us how many times a number contains another number. It compares two numbers in relation to each other.
Therefore 1/0.49 expresses the amount spent on advertising as a ratio
10-4x= -9x
I need help quick
Answer:
x = -2
Step-by-step explanation:
Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
PEMDAS is the order of operation, and =
Parenthesis
Exponents (& Roots)
Multiplication
Division
Addition
Subtraction.
~
First, add 4x to both sides:
10 - 4x (+4x) = -9x (+4x)
10 = -9x + 4x
10 = -5x
Isolate the variable, x. Divide -5 from both sides:
-5x = 10
(-5x)/-5 = (10)/-5
x = 10/-5
x = -2
x = -2 is your answer.
~
can you Evaluate 10⁰
Answer:
10⁰ =1
why?
because when everything ⁰ =1
hope it helped you:)
For a snack, Sameer ate a plum with 32 calories and several strawberries with 4 calories each. If the total of calories in Sameer’s snack was 56, how many strawberries did he eat?
Answer: 6
Step-by-step explanation:
So to find the answer, we would use the equation 32+4x=56 where as x represents the amount of strawberries Sameer ate. Now to solve for x
56-32=4x
24=4x
now divide 4 from bboth sides of the equation getting:
x=6
so Sameer ate 6 strawberries
HELP ME
Bob's Bagels sells 10 bagels for $11.00, and Donny's Bagels sells 4 bagels for $3.00. Which is the better deal?
Answer the questions to find out.
1. Will the better deal have a lower or higher ratio of dollars per bagel?
Write your answer in the space below.
2. What fractions do you compare to find the better deal?
Write your answer in the space below.
3. Which store has the better deal, Bob's Bagels or Donny's Bagels? Explain.
Write your answer in the space below.
Answer:
4 bagels for $3
Step-by-step explanation:
10 bagels for 11 = 1.10 and 4 bagels for $3 = 0.75
Answer:
i would say the first one because you get 10 bagels for 11 $ because 1.50 cents per bagel
Which equation matches the graph shown?
A.y=(x-2)(x-1)
B.y=-(x-2) (x+1)
c y= -( x+2) ( x*1)
D. y= ( x-2) (x+1)
Answer:
B. v = - (x - 2)(x + 1)Step-by-step explanation:
The parabola opens downward so a<0
zeros are: x₁=-1 and x₂=2, so the factors are:
(x - x₁) = [x - (-1)] = (x + 1)
(x - x₂) = (x - 2)
which gives: - (x + 1)(x - 2)
select all equations that have the same solution as 3x - 12=24
Answer:
4
Step-by-step explanation:
3x-12=24
-12 to both sides
3x-12-12=24-12
3x=12
3x/3=12/3x
x=4
can i have help on step to -2(8m+8)=-16
Answer:
m = 0
Step-by-step explanation:
[tex]-2(8m+8)=-16\\\\\frac{-2(8m+8)=-16}{-2}\\\\ 8m+8=8\\\\8m+8-8=8-8\\\\8m=0\\\\\frac{8m=0}{8}\\\\ \boxed{m=0}[/tex]
Hope this helps.
describe fully the single transformation that maps traingle a to triangle b
Answer:
it is a reflection
Answer:
reflection y=x
Step-by-step explanation:
What is the best solutionto this equation?
x+8= -2
A.-10
B.-6
C.6
D.10
Answer:
Step-by-step explanation:
x + 8 = -2
x = -10
the answer is a