Answer:
A≈254 cm^2
Step-by-step explanation:
The area of a circle is given by formula: π r^2
π has a constant value of 3.14 And the radius of the circle is 9 c m
the area= π r^2 = 3.14 x (9)^2 cm^2
= 3.14 × ( 81 )
= 254.34 c m^2
≈ 254 c m^2
Please answer this questions step by step
Answer:
(a) When a = 4 and b = -5, a² + b² - a·b = 61
(b) When a = 4 and b = -5, a³·b + a·b² = -220
(c) [tex]When \ a = 4 \ and \ b = -5, \ \dfrac{a - b}{a + b} + a -b = 0[/tex]
(d) When a = 4 and b = -5, (a + b)² - (a - b)² = 82
Step-by-step explanation:
The question relates to evaluation of expressions, given the values of the variables, "a" and "b"
Where;
a = 4 and b = -5
(a) For a² + b² - a·b, we have;
a² + b² - a·b = 4² + (-5)² - 4 × (-5) = 16 + 25 + 20 = 41 + 20 = 61
(b) For a³·b + a·b² we have;
a³·b + a·b² = 4³·(-5) + 4·(-5)² = 64 × (-5) + 4 × 25 = -320 + 100 = -220
(c) For [tex]\dfrac{a - b}{a + b} + a -b[/tex], we have;
[tex]\dfrac{a - b}{a + b} + a -b = \dfrac{4 - (-5)}{4 + (-5)} + 4 - (-5) = \dfrac{4 + 5}{4 -5} + 4 + 5= \dfrac{9}{-1} + 4 + 5 = -9 + 4 + 5 = 0[/tex]
[tex]\therefore when \ a = 4 \ and \ b = -5, \ \dfrac{a - b}{a + b} + a -b = 0[/tex]
(d) For (a + b)² - (a - b)² we have;
(a + b)² - (a - b)² = (4 + (-5))² - (4 - (-5))² = (4 - 5)² - (4 + 5)² = (-1)² - 9² = 1 + 81 = 82
When a = 4 and b = -5, (a + b)² - (a - b)² = 82
pls help i will give brainliest
Answer:
the thrid one
Step-by-step explanation:
Rita collected and stored beads in 4 different bags.the table below shows the number and color of beeds in each bag.
Answer:
Add the table and i might answer correctly
Step-by-step explanation:
6. Francine lives 9/12 mile from school. What is the distance from school
written as a decimal?
A. 12.9
B. 7.5
C. 9.12
D. 0.75
I WILL GIVE BRANIST plz help me
Answer:
10/8
Step-by-step explanation:
What you should do is awfully simple. Multiply 2 by 5 and put the product over 8.
(2 * 5)/8
10/8
The problem does say to leave my answer as an improper fraction, so 10/8 is the final answer.
The answer?
A-(5,-3)
B-(2,0)
C-(8,0)
D-(-3,5)
A plane started on the ground at ground level near the ocean. Upon taking off it climbed 9000 meters and leveled off. At the same time a submarine left from the same shoreline. It dove 250 meters down into the ocean. How many meters are there between the plane and the submarine.
Integers
Answer:
There is 9250 meters between the plane and the submarine.
Step-by-step explanation:
9000 above
250 below
9000+250= 9250 between the two vehicles
Help please will mark brainliest
Answer:
FalseStep-by-step explanation:
Line a
y = 5x - 6, it has slope of 5Line b
x + 5y = 5Rewrite in slope-intercept form to find its slope:
5y = -x + 5y = -1/5x + 1It has slope of -1/5Lines have different slopes: 5 and -1/5, therefore are not parallel
Answer:
The answer to the question provided is False.
Step-by-step explanation:
‣We are going to have to find the value of y for line b.
‣We are going to solve its equation.
[tex]x + 5y = 5 \\ \frac{- x \: \: \: \: \: = - x}{ \frac{5y}{5} = \frac{ - x + 5}{5} } \\ y = - \frac{1}{5} x+ 1[/tex]
‣So we have:
[tex]y = 5x - 6 \\ and \\ y = - \frac{1}{5} x + 1[/tex]
‣Remember that a slope is parallel to another slope if it has the same slope.
‣A slope is perpendicular to another slope if it has a negative reciprocal.
‣The slopes we have don't have the same slope, but they are perpendicular.
Factor out the GCF from 40x2 −10x
Answer:
10x (4x - 1)
Step-by-step explanation:
The GCF we can factor out is 10x.
40x²/10x = 4x
-10x/10x = -1
Find the value of 42 + 6 ÷ 2
Answer:
The answer isn't 24 the actual answer is 54.
Step-by-step explanation:
PEMDAS!
DUE IN 5 MINUTES MATH QUESTION
Answer:
x= -10
Step-by-step explanation:
So because the angle 55 is part of the same line as one of the unknown angles you can do 180-55 to find that first angle at the top, which is 125.
Next add all three angles (125 + x + 35 + x + 40)=180
Combine the x values to get 2x and subtract the three values from 180
Then 2x= -20, x should be equal to -10
You can plug x back into the values and check your work by adding all the values again, making it all equal to 180 degrees again
How many more dollars does Harry earn working as a babysitter for 5 hours than doing yard work for 5 hours? Show your work. (3 points)
please help im going to fail if i dont get my work done in 2 days
Answer:
Harry would receive $10 more by babysitting than by doing yard work
Step-by-step explanation: If Harry babysits for 5 hours, he would receive $60 but if he does yard work for 5 hours, he would receive $50.
The solution to a system of linear equations is (0, 4).
One of the linear equations in the system is
y = 8x +4.
Which equation could be the other linear equation in the system?
• y=8
• y= 4.0
• y = 80
• y=4
please help i dont understand and can u put how to do it
Answer:
1.88261%
Step-by-step explanation:
Use the formula (E - T) / |T| * 100
(92 - 90.3) / |90.3| * 100
1.7 / 90.3 * 100
0.0188261 * 100
And you get a 1.88261 percent error :)
discover the pattern and continue
monday, wednesday, tuesday, thursday,_____,_____, thursday
Answer:
Wednesday Tuesday. ya
Step-by-step explanation:
work backwads
Jade has $60. She wants to buy some movies that cost $11 each. Jade wants to have at least $20 remaining.
Which of the following inequalities correctly represents the scenario?
Answer:
60-11x < 20
Step-by-step explanation:
Let's first set out all the information we know.
Jade has only $60, so we cannot go above the amount she has.Each movie costs $11She wants at LEAST $20 remainingSo, the first thing that will be in the inequality would be $60. Since you are wasting money, you have to subtract.
The thing that will be subtracted more than once is $11, so it will have the variable "x" added to it.
What we have so far is:
60-11x
Because this is an inequality, we will have a less than sign.
After that, we can conclude that $20 will come next because that is at the end of the problem.
So, the answer is:
60-11x < 20
In a relay race, Aisha ran 1 and ¾ of a mile and Paula ran 1 and 5/12 of a mile. Who ran farther?
Answer:
Aisha ran farther
Step-by-step explanation:
Aisha - 1 9/12
Paula - 1 5/12
Make the denominator the same
A fish tank has 150 gallons of water and is being drained at a rate of 1/2 gallon each second. A fish tank has 120 gallons of water and is being filled at a rate of 1/4 gallon each second. After how many seconds will the ywo fish tanks have the same amount of water?
Answer:
40! Seconds
Step-by-step explanation:
Calculation for After how many seconds will the two fish tanks have the same amount of water
First step
Based on the information given let the equation be :
150-1/2x=120+1/4x
Second step
Now let solve for x which means that x will be the number of second by multiplying both side by 4
4(150-1/2x)=4(120+1/4x)
=600-2x=480+x
Third step
Let Add 2x on both side
600=480+3x
Third step
Let Subtract 480 on both side
600-480=480-480+3x
120=3x
Last step is to divide both side by 3
120/3=3x/3
40=x
Hence:
x=40 seconds
Therefore After 40 seconds the two fish tanks will have the same amount of water.
can someone help me with 26 and 27?
Answer:
B
Step-by-step explanation:
What is the measure of ∠J?
Answer:
6 cm
Step-by-step explanation:
Plz help due tomorrow
Answer:
15/16
Step-by-step explanation:
5×3=15
4×4=16
if they're two - you count them +
(my English is not very good :( )
what are the next 2 terms in the sequence
Answer:
4 1/4 and 4 3/4
Step-by-step explanation:
its adding 2/4 each time
Answer:
4.25 and 4.75
Step-by-step explanation:
just add 0.50
ughhhhhhh help again please!!!
Answer:
90 degrees
Step-by-step explanation:
Assuming that this polygon is a square, x would be 90 degrees. In a square, all angles are right angles.
Harrison has 60 cds in his music collection. If 20% of the cds are country music and 40% are pop music, how many cds are other types of music?
There are 9 other CD's of a different genre.
The polynomial 5x — 4x² + 3 — 2x³ is in standard form.
True or False.
Answer:
False.Answer = -2x³ - 4x² +5x +3MARK ME AS A BRAINLIST AND FOLLOW MEwhat?
djsbzizbssisns
Answer:
[tex]8x^{2}y^{4}[/tex] Answer B and C
Step-by-step explanation:
When a variable gets squared it looks like this (the exponent gets cut in half):
[tex]\sqrt{x^{2} }[/tex]=[tex]x[/tex]
So The square root of 64 is 8:
8
Then the next two exponents cut in half:
[tex]x^{2} y^{4}[/tex]
Then we put it back together:
[tex]8x^{2}y^{4}[/tex]
Letter B is the correct choice along with C because of distributive Property.
Bethany walks at a rate of 3 step every 2 seconds at this rate how many seconds will it take Bethany to walk 60 steps
Answer:
30seconds
Step-by-step explanation:
if it takes 2 seconds to walk 3steps then in 30 seconds she should have walked 60 steps.
A wholesale distributor of packaged nuts sells two different mixes of peanuts and cashews, mix A and mix B. Each package of mix A nuts
contains 8 ounces (oz.) of peanuts and 4 oz. of cashews. Each package of mix B nuts contains 6 oz. of peanuts and 6 oz. of cashews. Let x
represent the number of packages of mix A nuts and let y represent the number of packages of mix B nuts. No more than 120 oz. of peanuts
and no more than 96 oz. of cashews can be used each day. Which graph represents the numbers of packages of mix A and mix B that can be
produced?
Answer:
Cause it is
Step-by-step explanation:
[tex]1\\2 times4=[/tex]
Answer:
2
Step-by-step explanation:
1/2 * 4
=4/2
= 2
You and your friend participate in a charity run. For every mile run, $2 is donated to the charity. You run 4 miles and your friend runs 3 miles. How much money, in dollars, do you and your friend raise for the charity?
Answer:
$14
Step-by-step explanation:
Multiply each mile run by the amount of money for each mile. In this case, you run 4 miles and get $2 for each mile, so that's $8 for you. Your friend runs 3 miles, so that's another $6. Adding $8 plus $6 = $14.
You and your friend raised together 14 dollars for the charity by running.
What is a numerical expression?A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.
Given, You and your friend participate in a charity run. For every mile run, $2 is donated to the charity.
Also given that You run 4 miles and your friend runs 3 miles.
Therefore, The amount in dollars you and your friend raised for the charity
is (2×4) + (2×3) dollars.
= 8 + 6 dollars.
= 14 dollars.
So, Both of them together raised 14 dollars for the charity.
learn more about numerical expressions here :
https://brainly.com/question/29199574