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
Semenov [28]
3 years ago
14

Of the 420 sandwiches Joanna makes 20% are tuna sandwiches 40% are are ham sandwiches and the rest are egg sandwhiches.How.many

egg sandwhiches.are egg sandwhiches
Please help
Mathematics
2 answers:
Lera25 [3.4K]3 years ago
7 0
20% + 40% = 60%
100% - 60% = 40%

40% of 420
= (420/100) × 40
=168

Joanna makes 168 egg sandwiches

I hope this helps, feel free to ask any questions you may have
12345 [234]3 years ago
5 0

Answer:

20% as a decimal is 0.20. So, 240 x 0.20 is 48 tuna sandwiches, 40% as a decimal is 0.40 so 240 x 0.40 is 96 ham sandwiches. 48 + 96 is 144. So that means that the remaining 96 sandwiches are Egg Salad Sandwiches.


You might be interested in
Order from greatest to least 1.202;1.29;1.02
Reptile [31]

Answer:

1.29, 1.202, 1.02

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
For each given p, let ???? have a binomial distribution with parameters p and ????. Suppose that ???? is itself binomially distr
pshichka [43]

Answer:

See the proof below.

Step-by-step explanation:

Assuming this complete question: "For each given p, let Z have a binomial distribution with parameters p and N. Suppose that N is itself binomially distributed with parameters q and M. Formulate Z as a random sum and show that Z has a binomial distribution with parameters pq and M."

Solution to the problem

For this case we can assume that we have N independent variables X_i with the following distribution:

X_i Bin (1,p) = Be(p) bernoulli on this case with probability of success p, and all the N variables are independent distributed. We can define the random variable Z like this:

Z = \sum_{i=1}^N X_i

From the info given we know that N \sim Bin (M,q)

We need to proof that Z \sim Bin (M, pq) by the definition of binomial random variable then we need to show that:

E(Z) = Mpq

Var (Z) = Mpq(1-pq)

The deduction is based on the definition of independent random variables, we can do this:

E(Z) = E(N) E(X) = Mq (p)= Mpq

And for the variance of Z we can do this:

Var(Z)_ = E(N) Var(X) + Var (N) [E(X)]^2

Var(Z) =Mpq [p(1-p)] + Mq(1-q) p^2

And if we take common factor Mpq we got:

Var(Z) =Mpq [(1-p) + (1-q)p]= Mpq[1-p +p-pq]= Mpq[1-pq]

And as we can see then we can conclude that   Z \sim Bin (M, pq)

8 0
3 years ago
Vertex Form of Quadratic Functions
Nikitich [7]
The X-intercepts: (1,0),(-7,0)

Axis of symmetry: x= - 3

The vertex: (-3, -8)

The Y-intercept: (0, -7/2)

Concave up or down: concave up

Sketch: a poorly drawn picture on the bottom.

I hope that helps.

8 0
3 years ago
Divide using synthetic division.<br> -3x^3+11x^2-x+20 by (x-4).<br><br> Please show steps!
Vaselesa [24]
-3 11 -1 20
4 -12 -4 -20
-3 -1 -5 0
Bring down the -3,
Multiply -3 * 4
Add 11 and -12
Multiply -1 * 4
Add -1 and -4
Multiply -5 * 4
Add 20 and -20
Answer: The power is reduced by one from the
Dividend. -3x^2 – x - 5
I tried to upload a file also but I don't know if it will show up.

8 0
3 years ago
The difference between the square of two numbers is 11. Twice the square of the first number increased by the square of the seco
jeyben [28]

Answer:

Below in bold.

Step-by-step explanation:

x^2 - y^2 = 11

2x^2  + y^2 = 97

From the first equation:

y^2 = x^2 - 11

Substituting in the second equation:

2x^2 + x^2 - 11 = 97

3x^2 = 108

x^2 = 36

x = 6, -6.

Substituting  for x in the first equation:

(6)^2 - y^2 = 11

y^2 = 36 - 11 = 25

y = 5, -5.

6 0
3 years ago
Other questions:
  • The most hard question of all time that i need help :(
    8·1 answer
  • HELP ME PLEASEEEE! Thank you
    15·1 answer
  • If n is a positive integer and the product all the integeres from 1 to n inclusive is a multiple of 990 what is the least possib
    6·1 answer
  • :Which graph shows the solutions the following inequality?:<br> 4d - 6 &lt; 18
    8·2 answers
  • If x2 = 40, what is the value of x? (3 points)<br> 1) +80<br> 2) +20<br> 3) ανθο<br> 4) 1940
    5·1 answer
  • The graph of the function f(x)=x^2-4x+6 is shown here. What is it’s axis of symmetry
    8·1 answer
  • What are the solutions to this equation?
    9·1 answer
  • A fair spinner has 9 equal sections: 3 red, 4 blue and 2 green.
    12·1 answer
  • Which measure describes how much a sample mean varies when different samples are chosen?
    7·2 answers
  • Please solve this question
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!