A middle school has 200 boys and 300 girls enrolled in the seventh-grade. The principal randomly selects 45 seventh-grade students to take a lunch survey. How many of the seventh-grade students selected for the survey should the principal expect to be boys?
Answer:18
Step-by-step explanation:
Given
The school has 200 boys and 300 girls
The ratio of boys and girls is 2:3
If 45 seventh grade students are selected then the ratio of boys and girls remain the same
suppose there are 2x boys and 3x girls, such that ratio is 2:3
[tex]\Rightarrow 2x+3x=45\\\Rightarrow 5x=45\\\Rightarrow x=9[/tex]
No of the boys are [tex]2x=2\times 9=18[/tex]
Answer:
18
Step-by-step explanation:
what the another person said
PLEESE HELP
If someone who is 5 feet tall uses a potato gun to shoot a potato in the air at 100 feet per second, we can use the function ℎ()=−162+100+5 to calculate how far the potato will be from the ground at any given second (t).
What is the value of h(1)?
Answer:
267
Step-by-step explanation:
Why is DB equal to tan(theta)?
Step-by-step explanation:
[tex]tan = \frac{opposite}{adjacent} [/tex]
tan(tetha) = DC/1 ( here 1 bc as they said, an arc circe w/ radius (OB) 1
Question should guns be allowed to be at school for example can a security guard have a gun?
Answer: First secutitys at my school dont even have nothing but a walkie talkies in there hands but I will say this we have cops walking around inside of our school and there all armed up because obvisouly their cops so i would think not security should not have a fire arm because what happens if a old lady a securrityguard she cant move fast so I think not they would have to deal it with by hand and there walkie talkies.
Step-by-step explanation:
Answer:no because they might be part of a crime and shoot up the school like boom bang bin bot pow and 500 people drop dead like me in the bed room.
Step-by-step explanation:
Can someone solve this problem?
(4x^2)+99-4x(16x)
[tex](4x^2)+99-4x(16x)\\=4x^2+99-64x^2\\=-60x^2+99[/tex]
Is this what you want???
in AABC, the measure of angle A=x degree, the measure of angle B=(2x)degrees, and the measure of angle C=(6x+18)degrees. What is the measure of angle B?
Answer:
m<B: 36
Step-by-step explanation:
x + 2x + 6x + 18 = 180
9x + 18 = 180
9x = 162
x = 18
m<B:
2x
2(18)
36
Answer:
m<B=36°
Step-by-step explanation:
The sum of angles in a triangle add up to 180°.
That means the sum of m<A+m<B+m<C=180°
We're given that:
m<A=x°
m<B=(2x)°
m<C=(6x+18)°
we can substitute those values as m<A, m<B, and m<C
x+2x+6x+18=180
combine like terms
9x+18=180
subtract 18 from both sides
9x=162
divide by 9
x=18°
we found the value of x, but we're not done yet
The question asks to find m<B, which is 2x°
in that case, we can substitute our known value to find the measure of <B
m<B=2x°
m<B=2(18)°
m<B=36°
8
z
5
+
4
y
−
4
z
3
+
z
8
z
5
+
4
y
-
4
z
3
+
z
Answer:
What???
Step-by-step explanation:
Cant see it?????
Jill says he did it wrong. He should have multiplied the bottom first (3 x 5) and then multiplied by the height. Explain to Jill why Jack's method works and is equivalent to her method.
Answer:
Step-by-step explanation:
Jack's method is equivalent because of the "law of commutative property", which means that multiplication problems have the same result no matter the order.
2x5 is the same as 5x2
express y= x² + 2x + 3 in the form of y= (x-h)² + k
Given:
The equation is
[tex]y=x^2+2x+3[/tex]
To find:
The vertex form of the given equation, i.e., [tex]y=x^2+2x+3[/tex].
Solution:
We have,
[tex]y=x^2+2x+3[/tex]
It can be written as
[tex]y=(x^2+2x)+3[/tex]
Add and subtract square of half of coefficient of x, i.e., [tex]\left(\dfrac{2}{2}\right)^2=1[/tex].
[tex]y=(x^2+2x+1)-1+3[/tex]
[tex]y=(x^2+2(x)(1)+1^2)+2[/tex]
[tex]y=(x+1)^2+2[/tex] [tex][\because (a+b)^2=a^2+2ab+b^2][/tex]
Therefore, the required form of given function is [tex]y=(x+1)^2+2[/tex].
A customer pay 72$ for 18 sandwiches. If each sandwich cost the same amount , what is the cost per sandwich, in dollars?
Answer:
Each sandwich costs 4$.
Step-by-step explanation:
To find the answer we will divide 72$ by 18 and we get 4$.
The number of sandwiches and the total price of sandwiches are directly proportional.
Cost of 18 sandwiches = $72
Cost of 1 sandwich = $72/18
= $4
Hence the cost of 1 sandwich is $4.
Your social media ad costs $2.50 per thousand impressions. You get 3.14 million impressions. What is your approximate bill?
Answer:
7,850
Step-by-step explanation:
The approximate bill of impression is $7850.
What is multiplication?A mathematical arithmetic operation is a multiplication. Moreover, it is the practice of repeatedly adding the same expression kinds.
Example: 2 + 3 means that 2 is multiplied by 3 or that 3 is multiplied by 2 times.
Given:
Your social media ad costs $2.50 per thousand impressions.
You get 3.14 million impressions.
In a million,
there are 1000 of thousand in million.
So, there are 1000 times 3.14 of thousand impressions.
The amount in the bill,
= 3.14 x 1000 x 2.5
= $7850
Therefore, the bill is $7850.
To learn more about multiplication;
https://brainly.com/question/19634536
#SPJ6
The local Beep Boop store sells widgets and gizmos. If you subtract the cost of 3 gizmos from 7 widgets you would spend 28 Boop Bucks. Also, you would spend 16 Boop Bucks if you bought 4 widgets and 2 gizmos. Which of the two items, widgets or gizmos, does the Beep Boop store give away for free? How do you know? How much does the other item cost?
Answer:
$7
Step-by-step explanation:
its math again so sorry
Answer:
589
Step-by-step explanation:
Answer:
the answer i think is 103 centimeters
Step-by-step explanation:
how to write an essay about citisenship
Essay Definition of Citizenship:
In the literal sense a person who lives in a city is said to be a citizen. But in political science we use this terminal different sense. To find the real meaning of the term we are to go back to ancient Greece. Aristotle, the father of political science, called a person a citizen who would take a direct and active part in the administration of the state.
Since the states in ancient Greece were as small as the cities of Greece it was possible for the residents of the city-state to make law, to adjudicate and even enforce the law. These citizens did not include the slaves, women and manual workers. In such a case the number of the citizens was just half of the entire population. The position was not very different in the medieval Europe. There were serfs in the place of the slaves.
The position is quite different in modern nation-states, where all adult people are citizens who need not take an active part in the administration of the country, because it is not possible for the entire population of a vast country to meet together and make law and interpret it or enforce it.
I need help finding the first five terms of the following explicit formula and the sequence
Answer:
Step-by-step explanation:
Explicit formula of the sequence,
[tex]A_n=59+11n[/tex]
[tex]A_1=59+11(1)[/tex]
[tex]A_1=70[/tex]
[tex]A_2=59+11(2)[/tex]
[tex]A_2=81[/tex]
[tex]A_3=59+11(3)[/tex]
[tex]A_3=92[/tex]
[tex]A_4=59+11(4)[/tex]
[tex]A_4=103[/tex]
[tex]A_5=59+11(5)[/tex]
[tex]A_5=114[/tex]
Ann took a taxi home from the airport. The taxi fare was $2.10 per mile, and she gave the driver a tip of $5. Ann payed a Total of $49.10. (actual question is on screenshot below)
solve
y=-x+3
y=x^2+1
Answer:
[tex] - x + 3 = {x}^{2} + 1[/tex]
[tex] {x}^{2} + x = 2[/tex]
Answer:
Step-by-step explanation:
1st y=-x+3
Let's solve for x.
y=−x+3
Step 1: Flip the equation.
−x+3=y
Step 2: Add -3 to both sides.
−x+3+−3=y+−3
−x=y−3
Step 3: Divide both sides by -1.
−x/−1= y−3/−1
Answer:
x=−y+3
2nd queastion: y=x^2+1
In the image
Hope this helps :)
PLS BRAINLIEST
The total cost for a month at a fitness club is made up of a fixed fee and a cost per visit. Information about the total cost, C, in dollars, for n visits is shown below Determine a possible fixed fee, cost per visit and equation for the new total cost.
Answer:
C = n + 25
Step-by-step explanation:
The total amount of money is C, so the equation has to equal C. n is the cost per visit and then you add the fixed fee in which I chose 25
a car accelerates from 25 km/hr to 55 km/hr in 30 seconds. what is its accelerates ?
Here's link to the answer:
tinyurl.com/wpazsebu
To rent a party room, customers
are charged an amount equal to the number
of hours they rent plus a $60 cleaning fee.
What is the cost of a 3-hour rental?
WILL MARK BRANLIEST !!
Answer:
78
Step-by-step explanation:
im not sure but i think is 78
60+18=78
sorry
Given: KW perpendicular to JO. JP perpendicular to KO. KW intersects JP=Q Prove: triangle OKW similar to triangle OJP
Answer:
OKW similar to triangle OJP using Angle Angle
Step-by-step explanation:
Given
See attachment for triangles
Required
Prove their similarity
From the attachmen:
[tex]\angle JPO = \angle OWK = 90[/tex]
Also:
[tex]\angle O = \angle O[/tex] for both triangles i.e. reflexive property
Hence:
OKW similar to triangle OJP by AA i.e. Angle Angle
danielle did not complete 15 of her 200 assignments last year. Kim said that is 0.075 of her assignments and Kelly said it is 0.75 of her assignments. Who is correct and how do you know?
Answer:
Kim
is correct
Step-by-step explanation:
Here, we want to know who is correct between Kim and Danielle
From the question, what is not completed is 15 out of 200
To find what is not completed, we divide 15 by 200
Thus, we have;
15/200 = 0.075
This mean Kim is correct
Find the sum of the interior angle measures of each polygon.
Answer:
as I think 35-gon but not sure that much.
Answer:
900
Step-by-step explanation:
Sum of interior angles =(n-2)180
Number of sides = 7 - 2 =5
So 5 multiply 180
Which expressions are equivalent to 4(x + 1) + 7(x + 3)? Select all that apply.
A 4x + 4 + 7x + 21
B 4x + 1 + 7x +3
C 11x + 25
D 2x+ 25
E11x + 4
F X+4 + x + 21
Answer:
C
Step-by-step explanation:
4(x + 1) + 7(x + 3) = 11x+25
A ice skater jumped an turned 1 full circle in the air how many one degree angles did she turn through
PLEASE HELP ME!!!!!!
Answer:
1= 37
2= 37
3= 37
4= 37
5= 106
Step-by-step explanation:
a-15=4a-3
if u dont want spam then dont answer
Step-by-step explanation:
Simplify the equation to find the value of a.
Subtract 4a from both sides:
[tex] - 3a - 15 = - 3[/tex]
Add 15 to both sides:
[tex] - 3a = 12[/tex]
Divide each side by -3:
[tex]a = - 4[/tex]
please help question is in the picture
Answer:
tan ∅ = 15/8
Step-by-step explanation:
tan ∅ = 15/8
A train is traveling at a constant speed in miles per hour. Hours (x) Miles (y) Which equation models the data in the table? 1 20 2 100 O y=20x 3 180 O y = x + 80 4 260 5 340 Oy=60x – 80 O y = = 80x — 60
Given:
A train is traveling at a constant speed in miles per hour.
The table of value is:
Hours (x) Miles (y)
1 20
2 100
3 180
4 260
5 340
To find:
The equation for the given data table.
Solution:
It is given that the train is traveling at a constant speed in miles per hour. So, it is a linear relationship.
Choose any two point from the given table of value. Let the two points are (1,20) and (2,100). So, the equation of the line is:
[tex]y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]
[tex]y-20=\dfrac{100-20}{2-1}(x-1)[/tex]
[tex]y-20=\dfrac{80}{1}(x-1)[/tex]
[tex]y-20=80(x-1)[/tex]
Add 20 on both sides.
[tex]y=80(x-1)+20[/tex]
[tex]y=80x-80+20[/tex]
[tex]y=80x-60[/tex]
Therefore, the correct option is D.
Hello
Can you help me to do these two exercises please I block on those please it is on the derivatives of a number
Thank you so much in advance!!!
Answer:
First rememeber that if we have a function like:
g(x) = x^n
then:
dg(x)/dx = g'(x) = n*x^(n - 1)
And also if we have:
g(x) = f(x) + h(x)
then:
dg(x)/dx = g'(x) = f'(x) + h'(x)
1) We have the function f(x) = (x + 1)^2
We can rewrite this as:
f(x) = x^2 + 2*x + 1
Using both things written above, we know that:
f'(x) = 2*x + 1*2 = 2*x + 2
And we want to find f'(-2), so we only need to evaluate the above function in x = -2, this is:
f'(-2) = 2*-2 + 2 = -4 + 2 = -2
f'(-2) = -2
b) I suppose that this refers to the inverse function of f(x)
An inverse function is such that:
g( f(x)) = x
f( g(x)) = x
For f(x) = (x + 1)^2
The inverse will be something that first cancels that square, and then subtracts 1.
Then:
g(x) = √x - 1
if we evaluate this in f(x) we get:
g( f(x)) = √(f(x)) - 1 = √(x + 1)^2 - 1 = (x + 1) - 1 = x
Then the inverse function of f(x) is:
g(x) = √x - 1
This can also be written as:
g(x) = x^(1/2) - 1
Then the derivative of this will be:
g'(x) = (1/2)*x^(1/2 - 1) = (1/2)*x^(-1/2) = (1/2)*(1/√x)