1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mr_godi [17]
2 years ago
8

Russell randomly surveys seventh graders in his schools and finds 6 of 30 attend summer camp. if there are 200 seventh graders i

n his school, about how many are expected to attend summer camp.
Mathematics
2 answers:
suter [353]2 years ago
7 0
The answer is 40 EXPLANATION: 6% of 30 is 20%. 20% of 200 is 40
Lena [83]2 years ago
4 0

Answer:

40

Step-by-step explanation:

You might be interested in
DIscrete Math
Daniel [21]

Answer:

Step-by-step explanation:

As the statement is ‘‘if and only if’’ we need to prove two implications

  1. f : X \rightarrow Y is surjective implies there exists a function h : Y \rightarrow X such that  f\circ h = 1_Y.
  2. If there exists a function h : Y \rightarrow X such that  f\circ h = 1_Y, then f : X \rightarrow Y is surjective

Let us start by the first implication.

Our hypothesis is that the function f : X \rightarrow Y is surjective. From this we know that for every y\in Y there exist, at least, one x\in X such that y=f(x).

Now, define the sets X_y = \{x\in X: y=f(x)\}. Notice that the set X_y is the pre-image of the element y. Also, from the fact that f is a function we deduce that X_{y_1}\cap X_{y_2}=\emptyset, and because  f the sets X_y are no empty.

From each set X_y  choose only one element x_y, and notice that f(x_y)=y.

So, we can define the function h:Y\rightarrow X as h(y)=x_y. It is no difficult to conclude that f\circ h(y) = f(x_y)=y. With this we have that f\circ h=1_Y, and the prove is complete.

Now, let us prove the second implication.

We have that there exists a function  h:Y\rightarrow X  such that f\circ h=1_Y.

Take an element y\in Y, then f\circ h(y)=y. Now, write x=h(y) and notice that x\in X. Also, with this we have that f(x)=y.

So, for every element y\in Y we have found that an element x\in X (recall that x=h(y)) such that y=f(x), which is equivalent to the fact that f is surjective. Therefore, the prove is complete.

3 0
2 years ago
PLS HURRY Kimberly had p coins. Then she found 5 more coins in a drawer. Write an expression that
stellarik [79]

Answer: p + 5 = new amount

Step-by-step explanation:

You have to write it the way it's read

she has p = current coins

she found 5 more, ( +5 )

write that down and you get p + 5 = new amount

hope this helps

plz mark brainleist

6 0
2 years ago
Read 2 more answers
I need help rn please​
nirvana33 [79]

Hello!

\large\boxed{\text{ slope = -3}}

Use the slope formula to solve for the slope of the line (m):

m = \frac{y^{2} -y^{1} }{x^{2} -x^{1} }

We can plug in the points (0, 4) and (1, 1) to solve:

m = \frac{1-4}{1-0}= \frac{-3}{1}  = -3

Therefore, the slope of the line is -3.

8 0
3 years ago
A can of soda weighs 336 grams. find the weight in kilograms of 20 cans.
jolli1 [7]
20 cans in kilograms = 336 grams * 20 cans / 1000 = 6.72 kg
8 0
3 years ago
4 times a number is increased by 15, the answer is the same as when 70 is decreased by the number
pentagon [3]

4n+15=70+n


I'm pretty sure this is the answer

Have a good day!

3 0
3 years ago
Read 2 more answers
Other questions:
  • If it costs $4.96 to print 562 pages, how many pages were printed if the cost was $3.44?
    9·1 answer
  • Find the equation of the line using the point-slope formula. Write the final equation using the slope-intercept form. perpendicu
    11·1 answer
  • How many ways to make 1 dollar from pennies nickels, and dimes recurrence relation?
    7·1 answer
  • Is a 1/2 bigger than 1/8
    14·1 answer
  • What is the y-intercept of y = 5?
    10·2 answers
  • -5+6<br> What’s the answer
    7·2 answers
  • Which line segments are equal? How do you know?
    6·1 answer
  • Park rangers at a game preserve in Africa observed a cheetah run 3
    7·1 answer
  • Angle Relationships
    13·2 answers
  • Hi! I need help ASAP. Thank you
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!