Answer:
c
Step-by-step explanation:
.. . . . . . . . . . . . . . . . . .
The correct statement about the math class is the the girls make up 8/15 of the class.
What are ratios?
Ratio expresses the relationship between two or more numbers. It shows the frequency of the number of times that one value is contained within other value(s).
Ratio of the number of girls in the class = number of girls in the class / sum of ratios
8 / (7 + 8 ) = 8 / 15
To learn more about ratios, please check: https://brainly.com/question/25927869
The following are the ages (years) of 5 people in a room:
14, 14, 18, 18, 22
A person enters the room.
The mean age of the 6 people is now 16.
What is the age of the person who entered the room
Answer:
10
Step-by-step explanation:
14+14+18+18+22=86
6*16=96
96-86=10
Step-by-step explanation:
✧ [tex] \underline{ \underline{ \large{ \tt{S \: O \: L \: U \: T \: I \: O \: N}}} }: [/tex]
Let the age of a person who entered the room be ' x '.
✧ [tex] \underline{ \underline{ \large{ \tt{G \: I \: V \: E \: N \: \: D \: A\: T \: A } }}} : [/tex]
14 , 14 , 18 , 18 , 22 , xn ( number of observation ) = 6
[tex] \sum[/tex] x = 14 + 14 + 18 + 18 + 22 + x = 86 + x
Mean = 16
☯ [tex] \boxed{ \large \tt{Mean \: = \frac{ \sum \: x}{n} }}[/tex]
~Plug the values :
⇢ [tex] \large{ \tt{16 = \frac{86 + x}{6}}} [/tex]
~Apply cross product property :
⇢ [tex] \large{ \tt{86 + x = 16 \times 6}}[/tex]
⇢ [tex] \large{ \tt{86 + x = 96}}[/tex]
Move 86 to right hand side and change it's sign
⇢ [tex] \large{ \tt{x = 96 - 86}}[/tex]
⇢ [tex] \boxed{ \large{ \tt{x = 10}}}[/tex]
[tex] \large{ \boxed{ \boxed{ \underline{ \large{ \tt{Our \: Final \: Answer : \underline{10}}}}}}}[/tex]
Hope I helped ! ツ
Have a wonderful day / night ! ♪
⋆ Let me know if you have any questions regarding my answer ⋆
[tex] \underline{ \underline{ \mathfrak{Carry \: On \: Learning}}}[/tex] !! ✎
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The graphs of the equations Ax + By =15 and Ax - By =9 intersect at (2, 1). Find A and B. Show or explain your reasoning
The value of A and B will be 6 and 3 respectively
What is Linear equation with two variables?If an equation is stated in the form ax + by + c=0, it is said to be a linear equation in two variables, where a, b, and c are real numbers and the coefficients of x and y, i.e. a and b, are real values.Linear equations in two variables are the algebraic equations which are of the form y = mx + b, where m is the slope and b is the y-interceptHow to solve this problem?The steps are as follow:
Given equationsAx +By = 15
Ax - By = 9
Given that both lines intersect at point (2,1), so both above equation can be written as:2A + B = 15
2A - B = 9
Solving the above equation by adding both of them we get:4A = 24
A = 6
Putting value of A in one of equation we will get:2A + B = 15
2(6) + B = 15
B = 3
So the value of A and B will be 6 and 3 respectively
Learn more about Linear equation with two variables here:
https://brainly.com/question/1060504
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Whats 13 1/4 + 16 1/2
Answer:
29 3/4
OR
29.75
Step-by-step explanation:
1/2 is equal to 2/4 so we can convert it like this-
13 1/4+16 2/4
(13+16=29)
(1/4+2/4=3/4)
29 3/4
OR
29.75
55% of 6th grade students voted in the student election. 440 sixth grade students voted in the student election. How many total 6th graders are in the school
Answer:
800. Here's why:
Step-by-step explanation:
This indicats that 440 students make up 55% of the 6th grade population. We can write this as
55/440.
We also know that 'x' total students make up 100% of the 6th-grade population, so we can write this as
100/x.
55/440 must be equal to 100/x. When cross multiplied, it becomes 50x=44000. If we divided each side by 50, we'll find that x=880. Therefore, there are 800 6th graders
Answer:495
Step-by-step explanation:
440 rounds up to 450,450+450=900-the 10 we rounded so 890-440 is 450 which is half so we need to add 440 to 550 to get 990 and we half 990 to get 495 and that is your answer i think im very sorry if this is wrong btw a sixth grader did this please find out a way to reply to my comment or something like that to tell me if i am right.
Which equation can be used to find the number that can be added to 410 to get 946?
A
2 – 410 = 946
B
2 +410 = 946
С
410 – = 946
D
410 + 946 = 2
Answer:
B) 2+410=946
Step-by-step explanation:
Because the question is asking to add and b is the only one with a + sign.
Ruben put an empty cup underneath a leaking faucet. After hours, Ruben had collected cup of water. What is the rate, in cups per hour, at which the water is leaking from the faucet.
Complete question :
Ruben put an empty cup underneath a leaking faucet. After 1 1\2 hours, Ruben collected 1/4 cup of water. What is the rate, in cups per hour, at which the water is leaking from the faucet?
Answer:
1/6 cups per hour
Step-by-step explanation:
Given that :
Time = 1 1/2 hours = 1.5 hours
Cups of water collected = 1/4 cups
Rate in cups per hour :
Cups collected / time
1/4 ÷ 1 1/2
1/4 ÷ 3/2
1/4 * 2/3
= 2/12
= 1/6 cups per hour
Answer:
1/6 cups per hour
Step-by-step explanation:
Complete question :
Ruben put an empty cup underneath a leaking faucet. After 1 1\2 hours, Ruben collected 1/4 cup of water. What is the rate, in cups per hour, at which the water is leaking from the faucet?
Step-by-step explanation:
Given that :
Time = 1 1/2 hours = 1.5 hours
Cups of water collected = 1/4 cups
Rate in cups per hour :
Cups collected / time
1/4 ÷ 1 1/2
1/4 ÷ 3/2
1/4 * 2/3
= 2/12
= 1/6 cups per hour
Help i don't know what to do I will give brainiest
Answer:
it will be always negative
Step-by-step explanation:
brainliest please
2. Simplify the expression below.
6 X 4 = 2
Answer:
24=2
Step-by-step explanation:
6 ⋅ 4= 2
24 = 2
Plz help due tomorrow
PLEASE HELP HURRY
Thanks!!!!!!
This is math :)
Answer:
DON'T PRES THAT LINK THAT IS A HACK AND VIRUS
Step-by-step explanation:
HOPE THIS LETS YOU REMEMBER ABOUT NOT PRESSING THESE LINKS!
A band director is trying to decide what music to play for the halftime show. To get a sample, the director divides the band into groups based on their grade (freshmen, sophomores, juniors, and seniors). Then she randomly chooses a group and surveys every member of the chosen group. Which sampling method was used?
cluster sampling
simple random sampling
stratified random sampling
systematic random sampling helppppppo
Answer:
random sampling
Step-by-step explanation:
Answer:
A.
Step-by-step explanation: Cluster sampling
There are 25 balls in a bag, made up of two different colours,
There are 12 black balls
You remove 1 ball from the bag
What is the probablility of taking a blue ball? Give you answer as a fraction in simplest
form
Answer: The answer would be 13/25
Since there are 25 balls and 12 black balls, you want to subtract 12 from 25 to get the number of blue balls. There are 25 balls in total, so the probability of getting a blue ball is 13/25
show that
sinx/1+cosx=tanx/2
Answer:
See proof below
Step-by-step explanation:
show that
sinx/1+cosx=tanx/2
From LHS
sinx/1+cosx
According to half angle
sinx = 2sinx/2 cosx/2
cosx = cos²x/2 - sin²x/2
cosx = cos²x/2 - (1- cos²x/2)
cosx = 2cos²x/2 - 1
cos x + 1 = 2cos²x/2
Substitute into the expression;
sinx/1+cosx
= (2sinx/2 cosx/2)/2cos²x/2
= sinx.2/cos x/2
Since tan x = sinx/cosx
Hence sinx/2/cos x/2 = tan x/2 (RHS)
This shows that sinx/1+cosx=tanx/2
Keegan had 3.25 pounds of flour. After making bread, he had 1.75 pounds of flour left over. i know its 1.5 but whats the Equation?
Answer:
Step-by-step explanation:
loaves per week) 1.0 = 51 pounds of flour 1.5 = 76 pounds of flour 2.0 = 101 pounds of flour 2.5 = 127 pounds of flour 3 = 152 pounds of flour Pounds of Wheat Berries Storage For DIY Bread If you mill your own flour, to maintain your current consumption of bread during a time when you’re drawing on your deep pantry food storage:
Paul Colin and Brian are waiters. One night the restaurant earns tips totalling £77.40. They share the tips in the ratio 2:3:4. How much more does Brian get over Paul?
Given:
Total tip = £77.40
Paul, Colin and Brian share the tips in the ratio 2:3:4.
To find:
How much more does Brian get over Paul?
Solution:
Let the shares of Paul, Colin and Brian are 2x, 3x and 4x respectively.
[tex]2x+3x+4x=77.40[/tex]
[tex]9x=77.40[/tex]
[tex]x=\dfrac{77.40}{9}[/tex]
[tex]x=8.6[/tex]
Now, the different between Brian and Paul share is
[tex]Difference=4x-2x[/tex]
[tex]Difference=2x[/tex]
[tex]Difference=2(8.6)[/tex]
[tex]Difference=17.2[/tex]
Therefore, Brain get £17.2 much more over Paul.
For what value of x is the figure a rectangle?
12+1+1 1/2+1/8=?? To find the area of the family room
Answer:149/8
Step-by-step explanation:
Please give me the right answer. :)
Answer:
174mm hope this helps Happy Saint Patrick's day
Answer:
11,340 mm
Step-by-step explanation:
I am really really sorry if im wrong
A series of quarterly payments of P1,300 each at the first payment is due at 4 years, and the last payment at the end of 12 years. If money is worth 5 ½ % compounded quarterly:
Answer:
The Value of Payments is P18,557.15
Step-by-step explanation:
The quarterly payment is an annuity payment.
Use the following formula to calculate the present value of the payments.
PV of Annuity = Annuity Payment x ( 1 - ( 1 + interest rate )^-Numbers of periods ) / Interest rates
Where
Annuity Payment = Quarterly payment = P1,300
Interest rate = 5.12% x 3/12 = 1.375%
Numbers of periods = 4 years x 12/3 = 16 quarters
PV of Annuity = Value of Payments = ?
Placing values in the formula
Value of Payments = P1,300 x ( 1 - ( 1 + 1.375% )^-16 ) / 1.375%
Value of Payments = P18,557.15
help asap please , don’t know how to do this lol
Answer:
no
Step-by-step explanation:
I Have Some Questions For You Guys, A construction crew cut down thousands of acres of forest to build apartment buildings. How might the food chain be disrupted due to the producers being removed?
A.
The population of deer will have to find a new habitat so they will have food to eat.
B.
The population of coyotes will increase, so the deer will be safe.
C.
The population of deer will increase, so the coyotes will have food to eat.
D.
The population of deer will have to find people to feed them.
Answer:
A. The population of deer will have to find a new habitat so they will have food to eat.
Step-by-step explanation:
Definitely not the others if you need explanation ask :)
How do we draw graphs in those kinds of questions?
Match the statements written in English with the mathematical statements.
Group of answer choices I will give brainiest
The number -4 is a distance of 4 units away from 0 on the number line.
[ Choose ]
The number -63 is more than 4 units away from 0 on the number line.
[ Choose ]
The number 4 is greater than the number -4.
[ Choose ]
The numbers 4 and -4 are the same distance away from 0 on the number line.
[ Choose ]
The number -63 is less than the number 4.
[ Choose ]
The number -63 is further away from 0 than the number 4 on the number line.
[ Choose ]
Answer:
1
Step-by-step explanation:
Help me right now plsss I rlly need help
Answer: √25 = ±[5]
Step-by-step explanation:
5 × 5 = 25
-5 × -5 = 25 (negative times negative = positive)
1. What is the sum of its angle measures?
90°
180°
360°
Answer:
360 degrees
Step-by-step explanation:
Answer:
360°
Step-by-step explanation:
What is the value of the expression 2 x 7 + 9 − 3 ÷ 3?
Answer:
Answer is 22
Step-by-step explanation:
2×7+9-3÷3
14+9-1
23-1
=22
I hope it's helpful!
Answer: 22
Step-by-step explanation:
I did it on paper and got 22. I checked my answer by using a calculator and it also said 22. Correct me if I'm wrong. Hope this helped
Pls help me i rlly need help im bad at math
Answer:
115
Step-by-step explanation:
So you've already driven 124, so you would just subtract taht from 239
Help with this question
Find the distance between the two points. Ro - (-5, 6) (3,2)
Answer: 4√5
Step-by-step explanation:
d = √ (x2 - x1)^2 + (y2 + y1)^2
Answer:
d=4[tex]\sqrt{5}[/tex]
Step-by-step explanation:
d=[tex]\sqrt{(3-(-5)^{2} +(2-6)^{2}[/tex]
d=[tex]\sqrt{(3+5)^{2} +(2-6)^{2} }[/tex]\
d=[tex]\sqrt{64+16}[/tex]
d=[tex]\sqrt{80}[/tex]
d=[tex]4\sqrt{5}[/tex]
Four times a number is 44. What is the number? 44 n n n n 10 11 40 48
Answer:
11
Step-by-step explanation: