Answer:
There are 60 girls and 40 boys in the class.
Step-by-step explanation:
Given that the mean weight of 100 students in a certain class is 71kg, while the mean weight of boys is 65kg and that of girls is 75kg, to determine what is the number of boys and girls the following calculation must be performed:
1 x 75 + 0 x 65 + 75
0.9 x 75 + 0.1 x 65 = 74
0.8 x 75 + 0.2 x 65 = 73
0.7 x 75 + 0.3 x 65 = 72
0.6 x 75 + 0.4 x 65 = 71
Thus, there are 60 girls and 40 boys in the class.
Billy has a set of wooden boards. Each board is 0.6 meters long. If Billy lays 4 boards end-to-end, how many meters long will the line of boards be?
Answer:
2. 4 meters long
Step-by-step explanation:
0. 6 times 4 equals 2. 4
Please help nobody is helping so far please help
The surface area is 516 square feet
Answer: 152ft square
Hope this helps!
Find AC, round to the nearest whole number
20
Triangles are 180 total so just add 118 and 22 then subtract it from 180 for your answer
What the area for thos? A= 1/2 (bxh)
Answer:
A =8.75 ft^2
Step-by-step explanation:
The area of the triangle is
A = 1/2 bh where b is the base and h is the height
A = 1/2 ( 7 * 2.5)
A =8.75 ft^2
(5 + 7) = x
In word form
Answer:
Five plus seven equals x
Step-by-step explanation:
Answer:
Five plus seven equals x
Step-by-step explanation:
Anyone know the answer !
answer
Equilateral Triangle
Answer:
equilateral triangle
Step-by-step explanation:
Jude graphed the inequality s < -9,="" as="" shown.="">
A number line going from negative 12 to negative 4. A closed circle is at negative 9. Everything to the left of the circle is shaded.
Is his graph correct? Explain why or why not.
Answer:
Step-by-step explanation:
What does ="as="shown.="> mean?
No, his graph of s<-9 is incorrect. There should be an open circle at -9.
Answer:
sample response I would suggest rewording it
Step-by-step explanation:
No, Jude’s graph is incorrect. The inequality symbol is “less than,” so -9 is not included. He should have used an open circle on -9.
For the image above, which action below allows the scale to be balanced?
Add 3 blocks to the right side.
Add 4 blocks to the right side.
Take away 3 blocks from the left side.
Take away 5 blocks from the left side.
Answer:
B is correct
Step-by-step explanation:
I took the flvs test
The action to make both side balanced
Take away 5 blocks from the left side.
What is Balanced?In science, if an object is still, we say it is balanced. An object is in an equilibrium state when it is balanced. Any forces acting on the object are counterbalanced by forces moving the other way. The average location of the gravitational pull on an object is known as the centre of gravity.
We have the figure.
On right side there are total 8 weights.
and, on left there are total 3 weights.
So, the difference of blocks on
= 8- 3
= 5 blocks
So, take away 5 blocks from left.
Learn more about Balanced here:
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If the quadratic parent function is reflected in the y-axis and vertically compressed by a factor of 1⁄2, write an equation to represent the new function.
Answer:
h(x) = 1/2f(-x)Step-by-step explanation:
Let the parent function be:
f(x)Reflection over y-axis:
g(x) → f(-x)Vertical compression by a factor of 1/2:
h(x) → 1/2g(x)Final function in terms of parent function:
h(x) = 1/2f(-x)Simplify each expression. (10x3y2/5x-3y4)-3 x=0 y=0
Answer:
D
Step-by-step explanation:
Coach Jump is standing on a platform watching the football team practice. If the platform is 12 feet high and the quarterback is standing 23 feet from the base of the platform, find the angle of depression from Coach Jump to the quarterback. Round to the nearest degree.
Answer:
62 degrees.
Step-by-step explanation:
What you will have here is a right triangle. For the vertical put 12 ft and for the horizontal put 23 ft. You are trying to find the angle between the verticle and hypotenuse. This is what tangent is used for since you know the opposite and you know the adjacent lengths.
But since you are trying to find the angle you need to do an inverse tangent (also called arctangent)
ArctanФ = Adj/opposite
ArctanФ = 12/23 = 27.47 degrees. Rounded to the nearest degree is 27 degrees, if it wants rounded up its 28 degrees.
The angle of depression from Coach Jump to the quarterback is 27.6°.
What are trigonometric identities?There are three commonly used trigonometric identities.
Sin x = Perpendicular / Hypotenuse
Cosec = Hypotenuse / Perpendicular
Cos x = Base / Hypotenuse
Sec x = Hypotenuse / Base
Tan x = Perpendicular / Base
Cot x = Base / Perpendicular
We have,
In this diagram,
C represents Coach Jump,
B represents the base of the platform,
θ represents the angle of depression from Coach Jump to the quarterback.
Now,
We want to find θ.
We can use the tangent function,
So,
tan Ф = 12/23
Ф = [tex]tan^{-1}[/tex] 12/23
Ф = 27.55°.
Thus,
The angle of depression from Coach Jump to the quarterback is 27.6°.
Learn more about trigonometric identities here:
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Mrs.Kim wants to share the stickers equally with each of her students. there are 32 students in here class
100 points for this
Answer:
Ok... what's the question
Step-by-step explanation:
Answer:
anwser= 8 she will have 0 left
Step-by-step explanation:
each student gets 8 stickers
:)
A kingfish needs to be cut into 8-ounce pieces. If the fish weights 12.5 pounds, how many pieces can be cut? 1 pound=16 ounces
Answer:
25 pieces
Step-by-step explanation:
12.5 * 16= 200 ounces
therefore 200/8=25
What is the area of an equilateral triangle with perimeter 24 inches?
A store has a sale where every item has a scale price that is 20% less than the regular price . Write an Expression that represents the sale price of an items if the regular price is p dollars PLEASEEE HELP I HAVE TO MAKE PROGRESS
Answer:
0.80p
Step-by-step explanation:
sale price = p - (20% of p)
= p - 0.20p
= 0.80p
8(-3/2x+6)=-9(4/3x-8)
What two numbers multiply together to give you -36 and add together to give you -9
Answer:
-12 and 3
Step-by-step explanation:
-12x3= -36
-12+3= -9
Answer:
-18
Step-by-step explanation:
please help me please i really need help please
Answer:
There are a total of 24 players and 4 teams.
Please let me have brainliest :)
Does this expression represent the sum 13.76 + 2.8?
14 + 4/100
Answer:
This might be wrong.
False?
Answer:
False
Step-by-step explanation:
14 plus 4/100 equals 14.04
13.76 plus 2.8 equals 16.56
Kayla takes 7 hours to mow 2 lawns. At this rate, how long will it take her to mow 13 lawns?
Answer: at least 6 more hours
Step-by-step explanation:
Answer:
45 hours and a half
Step-by-step explanation:
Divide 7 by 2. Multiply 7 by 13
1 hr=3.6 ×10^3 seconds
1 day =24 hrs
1 year =3.65 ×10^2days
use scientific notation to calculate the number of seconds in 3 days
Answer:
1 Year = 8.76 x 10³ Hours
3. Con la finalidad de contar con un alimento para animales con un valor nutritivo
más alto que el maíz común, un grupo de expertos comparan dos nuevas varie-
dades de maiz con un contenido de aminoácidos modificado llamadas opaca-2
y harinoso-2, con maíz común. Los investigadores mezclan maíz y soya para ali-
mentar animales, con 12%, 16% y un 20% de proteina. Suministran diariamente
este alimento compuesto a 10 pollos machos y anotan su aumento de peso al
cabo de 21 días. El aumento de peso de los pollos es una medida de valor nutri-
tivo del contenido del alimento, que se suministra. De acuerdo a lo anterior iden-
tifica ¿Cuál es la variable dependiente?. ¿Cuál es la variable independiente?, y
el aumento de peso que sería?
13
on qué conocimientos cuento?
Evaluate the expression when x=4 and y+-6.
x-5y
Answer:-26
Step-by-step explanation:
if right answer I will give brainly and 90 points
Answer:
i can bet my brainliest that the answer is c
Step-by-step explanation:
solve for x
solve for x
solve for x
Answer:
x = 95
Step-by-step explanation:
(2x - 60)° = (x + 35)° (corresponding angles are congruent)
2x - 60 = x + 35
2x - 60 - x = x + 35 - x
x - 60 = 35
x - 60 + 60 = 35 + 60
x = 95
Answer:
x = 95
Step-by-step explanation:
What is the greatest common factor (GCF) of 24 and 42?
Answer:
6
Step-by-step explanation:
-5y < -15 Help Me Please
Answer:
y>3
Step-by-step explanation:
-5y<-15
-5/-5<-15/-5
y>3
y can equal anything more than 4. the products value has to be greater than 15, but it has to be on the negatives
A. given
B. substitution property of equality
C. linear pair postulate
D. definition of a linear pair
Help asap please
what is x? (WILL GIVE BRAINLIEST)
Answer:
5
Step-by-step explanation:
Answer:
x = 5
Step-by-step explanation:
These are vertical angles, so both equal 51 degrees. To solve for x, solve the equation (9x + 6) = 51. 51 - 6 is 45. 45 divided by 9 is 5. So x = 5.
Hope it helps!
2.5 pounds of grapes cost 2.25 dollars what is the cost per pound