The mean of 12 numbers is 20 and the mean of another 8 numbers is 25 find the mean of the 20 numbers
Answer:
22
Step-by-step explanation:
mean is calculated as
mean = [tex]\frac{sum}{count}[/tex]
Given the mean of 12 numbers is 20 , then
[tex]\frac{sum}{12}[/tex] = 20 ( multiply both sides by 12 )
sum = 240
Given the mean of 8 numbers is 25 , then
[tex]\frac{sum}{8}[/tex] = 25 ( multiply both sides by 8 )
sum = 200
Total sum of the 20 numbers = 240 + 200 = 440, then mean of 20 numbers is
mean = [tex]\frac{440}{20}[/tex] = 22
can you please help me
Answer:
I can see the picture can u resend it?
Step-by-step explanation:
Manuel bought 9 pounds of apples.
He has eaten 3
4 of a pound so far and has
$15 worth of apples left. Write and solve an
equation to find the cost of the apples per
pound to the nearest dollar. How much did
the apples cost per pound?
Answer:
1) Since Manuel bought 9 pounds and ate 3/4 of 1 pound, he has 8.25 pounds left (9 - 0.75 = 8.25)
2) Let's call "x" the cost of 1 pound of apples
3) (8.25)*(x) = $15
4) x = $1.81818 rounded to the nearest dollar is $2 / pound
A counselor plans transportation for 120 students for a field trip using buses and vans.
• Exactly 120 students can fit in 2 buses and 2 vans.
Exactly 120 students can also fit in 1 bus and 6 vans.
.
Which statement is true?
Answer:
Each bus can fit
48
students, while each van can fit
12
students.
Step-by-step explanation:
i have to determine if DE is parallel to AC
Answer:
Triangle BDE and triangle BAC are similar triangles
Hence, two lines DE and AC are parallel to each other
Step-by-step explanation:
For proving that DE is parallel to AC, we are required to prove that triangle BDE and triangle BAC are similar triangles
The ratio of sides of both the triangle must be equal to each other
Hence
[tex]\frac{BE}{DB} = \frac{BC}{BA} \\\frac{16.1}{28} = \frac{20.7+16.1}{64}\\0.575 = 0.575[/tex]
and angle B is common.
Hence the two triangles are similar.
Therefore angle BDE and angle BAC are equal like wise angle BED and angle BCA are equal.
Thus, the two lines DE and AC are parallel to each other
Can someone help me please? Ill mark brainliest c:
4% more than 150 is, can yall explain me each step
Answer:
156
Step-by-step explanation:
Frank designed a net for a storage shed that he is going to construct out of metal. The design consists of a square base and four square sides, plus four triangular parts that make up the roof.
He had 250 square feet of metal to use to build the shed. (What is the surface area of the storage Shed that Frank Designed?) (Does Frank have enough metal to construct his design yes or no?)
Answer:
Yes, Frank does have enough, he has 250 metal and only has 228 surface area.
Step-by-step explanation:
You take all the triangles (4) and multipy 4 x 6 (24) then divide that by 2 (12) so now you know all the triangles are equal to 12. Then the squares, you multiply 6 x 6 (36) now you know all the squres are equal to 36 and then you add 12 + 12+12+12+36+36+36+36+36 and then you get 228.
i need help find AC please
Answer:
isnt it in your room
Step-by-step explanation:
What are the measures of the other three angles formed by the intersection?
Answer:
1 = 130
2 = 50
3 = 130
Step-by-step explanation:
Since we already know that one angle is 50 degrees, this also tells us that angle two is congruent to it because it is opposite to it. Now the two other adjacent angles, basically just do 180-50 to get 130.
If you spin the spinner 11 times, what is the best prediction possible for the number of times it will land on yellow?
Answer:50%
Step-by-step explanation:
What is the surface area of the shoebox with the dimensions shown in the figure?
Answer:
256in^2
Step-by-step explanation:
12×5=60
60×2=120
5×4=20
20×2=40
12×4=48
48×2=96
120+40+96=256
A=256in^2
3 cm
5 cm
6 cm
What is the surface area of the solid above?
A. 108 cm2
B. 126 cm2
C. 14 cm2
D. 96 cm2
Answer:
check my explanation
Step-by-step explanation:
yes it is c.
by adding the ones on screen
it is option C
Find the area of the figure. Round to the nearest tenth
Answer:
Find the area of each triangle and then add it up. As you are aware, to find the area of a triangle the equation is B times Height divided by 2. And to make it easier do the top left triangle and the top right triangle, add them together and then divide that by 2.
Step-by-step explanation:
3 time 5 equals 15 divided by 2 equals 7.5
5 times 8 equals 40 divided by 2 equals 20
7.5 plus 20 equals 27.5
27.5 times 2 equals 55
therefor your answer should be 55m
Which situation could be represented by -18
A. A gain of $18
B. A distance of 18 meters above sea level
C.A temperature of 18 degrees above zero Fahrenheit
D. A loss of 18 points
students at franklin middle school were serveyed to find where they spent there summer vacation .the graph below represents the data from 80 students.
how many more students surveyed spent their summer vacation in californa than number of students who spent their summer vacation in colorado?
Answer:
B. 4 people
Step-by-step explanation:
In total, there are 80 students, so the number of people who spent their vacation in california is 25% of 80, which is 20 people.
For the number of people who went to Colorado, it is 20% of 80, which is 16.
20-16 = 4 people
Select each figure which the value of x is 42
Answer: 6
Step-by-step explanation: Sorry if it's wrong
Could someone please help me out with this
Answer:
17 + 4 = 21
21 x 6 = 126
126 divided by 2 = 63 in2
Step-by-step explanation:
Area of trapezoid:
B1(base 1) + B2(base 2) x H (height) x 1/2 (basically dividing by 2)
Dado a seguir 1, 1, 1, 2, 4, 2, 6, 3, 3, 7, 2, 3, 8, 9 podemos afirma que:
a)A média é 3
b)A moda 7
C)A mediana é 3
d)a moda é 1
e)a media é 3,4
If the graph of a quadratic function has x-intercepts at x = -1 and x = -2, what conclusions can be drawn about the function?
A. The roots of the function are 1 and 4.
B. The roots of the function are -1 and -2.
C. There is not enough information given to answer the question.
D. The zeroes of the function are 0 and 4.
Concept 9.7: Write the equation of the circle with center at (-7, 11) and radius of 8.
if it wants the measurement of arcJK....
Answer:
ArcJK= 128
Step-by-step explanation:
Circle is 360 degrees
<KL is the diameter which is a straight line equals 180 degrees
Since <KLis also a central angle arcKL equals 180
Take <K (26) and times by two cause its an inscribe angle, 26*2=52
arcJL=52
add both arcKL and arcJL together: 180+52=232
then you take 360-232=128
and 128 is KLarc
hello please help thanks
Answer:
oceans and the Sun
Step-by-step explanation:
The Sun heats ocean water causing some to evaporate. Tides move the ocean water. Waves move ocean water onto the shore.
If triangle height was 3ft and the base was 24ft what be the area? WILL GIVE BRANLIEST
Answer:
A=36 ft²
Step-by-step explanation:
the formula for the area of a triangle is given as (b*h)/2, where b is the base and h is the height
we are given the a height of 3 and a base of 24
so we can plug what we know into the formula
A=(3*24)/2
multiply
A=72/2
divide
A=36 ft²
hope this helps!
como fasso essa conta 2x-10=50
Answer:
correct
Step-by-step explanation:
Sabrina has designed a rectangular painting that measures 60 feet in length and 40 feet in
width. Alfred has also designed a rectangular painting, but it measures x feet shorter on
each side. When x = 2, what is the area of Alfred's painting?
Answer:
100
Step-by-step explanation:
Please helpppp i don’t understand
Answer:
Think the answer will just be 5
Step-by-step explanation:
I don't use step by step so yeah
in a class room 1/6 of students are wearing blue shirts 2/3 are wearing white shirts there are 12 students how many are wearing shirts other than blue shirts?
Answer:
4 students
Step-by-step explanation:
what we know: 12 students, 2/3 are wearing blue, 1/6 are wearing red
first you have to make the fractions have the same denominator(2/3=4/6)
theres also 1/6 that are not wearing blue or red (1/6+4/6=5/6, 6/6-5/6=1/6)
so that makes it 2/6 of the students not wearing blue(1/6+1/6=2/6)
simplify(2/6=1/3)
1/3 of 12 is 4 (12÷3=4)
the equations are in parentheses and bolded, italicized, underlined.
hope this helps :)
Answer the question above
Answer:
BA
Step-by-step explanation:
Here, we want to get the hypotenuse side
The hypotenuse represents the longest side
it is the side that faces the largest angle in a right triangle
The largest angle in a right triangle is the right angle which is the angle 90
It is like the square at a corner at the vertex C
The side facing it here is the the length AB (BA)
please pls help
a+12=21
Answer:
Down Below
Step-by-step explanation:
[tex]a+12=21\\a+12-12=21-12\\a=9[/tex]
Answer:
9
Step-by-step explanation:
a +12 = 21
a + 12 - 12 = 21 - 12
a = 9
the length of the hypotenuse of a right triangle is 15 and the length of one leg is 12 find the length of the other leg
Answer:
the other leg would be 12