In a race, the mean time for three runners was 12.4 seconds and the mean
time for another six runners was 11.5 seconds. Calculate the mean time for
all the nine runners
Answer:
11.8
Step-by-step explanation:
3(12.4) + 6(11.5) = 37.2 + 69 = 106.2
106.2/9 = 11.8
Answer quickly!!!!!!!!
Answer:
c: 8 i'm sure
Step-by-step explanation:
Because we count where the line stops is 8 squares which means it's 8
At the beginning of spring, Austin planted a small sunflower in his backyard.
When it was first planted, the sunflower was 25 inches tall. The sunflower
then began to grow at a rate of 3 inches per week. How tall would the
sunflower be after 6 weeks? How tall would the sunflower be after w weeks?
Answer:
After 6 weeks the sunflower would be 43 inches tall. After w weeks, the sunflower would be 25 + 3w tall.
HELP!!! PRECALC Continuity problem, will give brain liest, thank you!!!
Answer:
Go to algebraic calculator
Step-by-step explanation:
Then go to Microsoft calculator it has everything
brainliest?
please help me
( will give brainliest )
any links or websites commented will be reported !
HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP! HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP! HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP! HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP! HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!HELP!please show work
Answer:
12-27+9Y=5+6=90X5=800
Step-by-step explanation:
I need all the help I can
The box-and-whisker plot summarizes student scores on a physical fitness test. Students receive an award for scores at or above the upper quartile. What is the lowest score a student can get to receive an award?
Answer:
74
Step-by-step explanation:
To receive an award, student must obtain a score at or above the upper quartile, from.tye boxplot, the upper quartile is depicted by the endpoint of the box. Hence, the upper quartile of the distribution is 74. Hence only stude Ts who score 74 and above will receive an award Hence, the minimum score required is 74.
The equation of a parabola is y=x^2–4x+13. Write the equation in vertex form.
Simplify any fractions.
Answer:
y = (x - 2)² + 9
Step-by-step explanation:
To obtain the equation in vertex form use the method of completing the square.
Add/ subtract ( half the coefficient of the x- term)² to x² - 4x
y = x² + 2(- 2)x + 4 - 4 + 13
= (x - 2)² + 9 ← in vertex form
Answer:
vertex form : y=(x-2)^2+9
Step-by-step explanation:
To convert a parabola from standard form y=x^2-4x+13 to vertex form, we complete the square.
first, complete the square using the x-terms, use the constant term to adjust and make a perfect square.
y= x^2-4x+4 + 9
Factor the first three terms on the right-hand side.
y=(x-2)^2 + 9
the resulting express is then the vertex form, which means that
the vertex is at (x-2) = 0, x=2, and at y=9.
What value of x makes the 2 triangles congruent by HL? Find the length of CB
Step-by-step explanation:
here's your solution
==> Both traingle are congruent
==> BC = BD. [ c.p.c.t ]
==> x + 8 = 3x - 14
==> x - 3x = - 14 - 8
==> - 2x = - 22
==> x = 22/2
==> x = 11
now CB = x + 8 = 11 + 8
CB = 19
hope it helps
Please help ASAP I’ll mark you as brainlister please
Answer:
2 x 2=4 on each side so 4 x 2=8
5 x 2=10
10 x 4=40
Step-by-step explanation:
There are 140 cars in a parking lot.Bob looks at 15 cars and finds out that 2 cars are gray-colored. Approximately how many cars in the parking lot are gray-colored?
Answer:
about 18.7
Step-by-step explanation:
I really need help this is hard
Answer:
y = 3x + 3
Step-by-step explanation:
Y intercept is 3 so that's at the end of the equation. Input the points and that equation fits.
A school purchases boxes of candy bars. Each box contains 50 candy bars. Each box costs $30. How much does the school have to charge for each candy bar to make a profit of $10 per box?
A $0.40
B $0.50
С $0.80
D $1.25
Answer:
C
Step-by-step explanation:
30/50 = each bar costs 0.60 dollars
10/50 = 0.20 dollars
0.60 + 0.20 = 0.80
The circumference of a circle is 9π m. What is the area, in square meters? Express your answer in terms of π
Answer:
[tex]20.25\pi\:\mathrm{m^2}[/tex]
Step-by-step explanation:
Formulas to know:
Area of a circle: [tex]A=r^2\pi[/tex]Circumference of a circle: [tex]C=2r\pi[/tex]Since we know the circumference, we can use formula for the circumference of a circle to find the circle's radius:
[tex]9\pi=2r\pi,\\9=2r,\\r=4.5[/tex]
Now we can plug in [tex]r=4.5[/tex] into the formula for an area of a circle:
[tex]A=4.5^2\pi=\boxed{20.25\pi\:\mathrm{m^2}}[/tex]
Answer:
20.25 pi
Step-by-step explanation:
The circumference of a circle is given by
C = 2 * pi *r
9 pi = 2 * pi *r
Divide each side by 2pi
9pi / 2 pi = 2 pi r / 2 pi
4.5 = r
Now we can find area
A = pi r^2
= pi ( 4.5)^2
20.25 pi
Use the Law of Cosines to find a. Round answer to the nearest tenth
Answer:
Step-by-step explanation:
A rectangle has a length of 2 m and a width of 40 cm what is the perimeter of the rectangle ( show your work)
Answer:
0.05 im pretty sure to my calcutor
Step-by-step explanation:
Find the sum of the 1st 100 terms: 100+98+96+....
Answer:
First we Check if its an AP or GP
Its an AP because the Second term Minus the First term is = to 3rd term Minus Second term
Since it said "Sum"
The formula we should think Of is
Sn = n/2[2a + (n-1)d]
n=100
a(First term) =100
Common difference 'd' = Second term - First term or Third term - Second term
So
d= 98-100 or 96-98
d=-2.
Applying the Formula...
Sn = 100/2 [2(100) + (100-1)(2)]
Sn = 50[200 + (99)(2)]
Sn= 50[200 + 198]
Sn = 50[398]
Sn = 19,900.
least common multiple for (x+3)^2(x-2) and (x+3)(x^2-16)
[tex] {(x + 3)}^{2}(x - 2)(x + 4)(x - 4)[/tex]
Step-by-step explanation:
[tex] {(x + 3)}^{2} (x - 2) \: \: \: (x + 3)( {x}^{2} - 16)[/tex]
The first one can be kept in that form while the second can be factored as
[tex](x + 3)(x + 4)(x - 4)[/tex]
so we can see that the LCM is
[tex] {(x + 3)}^{2}(x - 2)(x + 4)(x - 4)[/tex]
∠A and ∠ B ∠B are complementary angles. If m ∠ A = ( 8 x − 23 ) ∘ ∠A=(8x−23) ∘ and m ∠ B = ( 7 x − 7 ) ∘ ∠B=(7x−7) ∘ , then find the measure of ∠ A ∠A
Answer:
Step-by-step explanation:
angle A+angle B=90 degree
8x-23+7x-7=90
15x-30=90
15x=90+30
x=120/15
x=8
substitute the value of x in angle A
8x-23
8*8-23
64-23
41 therefore angle A=41 degree
Need help !
Is it linear , quadratic, exponential
Answer:
Exponential
Step-by-step explanation:
So lets look at the table.
When x = 1, y = 3
When x = 2, y = 9.
Hmmm, this doenst seem like x+number=y. It doesnt seem like a quadratic, where the values go up, then down, then up again. Or vise versa.
So this rules out linear and quadratic, for the x doesnt change by a constant, or change the direction of y.
This leaves exponential or none of the above.
When x = 3, y = 27
When x = 4, y = 81
This seems like a exponent, since:
3 to the first power is 3
3 to the second power is 9
3 to the third power is 27
and 3 to the fourth power is 81
Answer:
exponential function
Hope this helps! ;)
Which equation can be used to solve for the value of x?
option : c. 2x + 15 = 145
cuz, the angles are vertical opposite angles
Answer:
2x + 15 = 145
Step-by-step explanation:
vertical angles are congruent
=> (2x + 15)° = 145°
21/24 x 16/24, guys plz help..
Answer:
g00gle
Step-by-step explanation:
click new tab and type in 21/24 x 16/24
how do you find tax paid
Answer:
You can pay your personal and business taxes to the Canada Revenue Agency (CRA) through your financial institution's online banking app or website. Most financial institutions also let you set up a payment to be made on a future date.
Step-by-step explanation:
step by step
Answer:
Step-by-step explanation:
150000 +11000++43000+20+40=204,060
Find the work done when a crane lifts a -pound boulder through a vertical distance of feet. Round to the nearest foot-pound.
Answer:
72000ft-1b
hope it helps
please mark brainliest
What is the diameter of a hemisphere with a volume of 863 in', to the nearest tenth
of an inch?
Answe 33.2
Step-by-step explanation:
863÷3.14=274.8407643312 find the square root then multiply by 2
The diameter of the hemisphere is twice the radius,
d = 2r ≈ 16.6 inches
What is volume?Volume is the measure of the amount of space occupied by a three-dimensional object. It is usually expressed in cubic units, such as cubic meters, cubic feet, or cubic centimetres.
The volume of a hemisphere is given by V = (2/3)πr³, where r is the radius of the hemisphere.
We can solve for the radius as follows:
V = (2/3)πr³
863 = (2/3)πr³
r³ = (863 x 3) / (2π)
r³ ≈ 650.35
r ≈ 8.3 inches
The diameter of the hemisphere is twice the radius, so:
d = 2r ≈ 16.6 inches
To know more about volume follow
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x+3x=40 what is x please
Answer:
x=10
Step-by-step explanation:
1. Combine like terms
4x=40
2. Divide 4 both sides to x alone
4x/4=40/4
x=10
Answer:
10
Step-by-step explanation:
x+3x=40
4x=40
x=40/4=10
Find the value of r.
Answer:
r = 10.5
Step-by-step explanation:
using the Pythagorean theorem:
(7 + r)² = 14² + r²
49 + 14r + r² = 196 + r²
subtract r² from both sides of the equation:
14r + 49 = 196
subtract 49 from both sides:
14r = 147
divide both sides by 14:
r = 10.5
Which number has a 3 with a value that is 100 times greater than the value of 3 in 20.342 ?
1) 307.18
2) 423.06
3) 108.173
4) 36.25
Answer:
108.173
Step-by-step explanation:
Of the students at Fillmore Middle
School, 0.5625 are bused to school.
Which percent is equivalent to 0.5625?
Answer:
56.25%
Step-by-step explanation: