B) c - 1/5c - 40 = 120
c- (original cost) - 1/5c (sale) - 40(coupon)= 120(final cost)
Hope that helps! :)
Answer:
180 degrees
(x,y) becomes (-x,-y)
270 degrees
(x,y) becomes (y,-x)
90 degrees
(x,y) becomes (-y,x)
Step-by-step explanation:
Here, we want to write a rule for each of the counterclockwise rotation
The rule are as follows;
180 degrees
(x,y) becomes (-x,-y)
270 degrees
(x,y) becomes (y,-x)
90 degrees
(x,y) becomes (-y,x)
Answer:
9 grams
Step-by-step explanation:
<u>We can use these equations</u>:
y = ax
- Where y is the total amount of baking soda (in mg)
- Where a is the number of servings
- Where x is the amount of baking soda in one single serving (in mg)
Here we know that y = 1800 and a = 2, so we will need to solve for x
- Solving for x we get
and plugging in our known values we get
and this simplifies to 900 - This means one serving contains 900 mg of baking soda
We can now change the equation to solve for the total amount of baking soda required to serve 10 people
- We know that a = 10 and x = 900
- The equation is already solved for y, so plugging in our new values we have y = (10)(900) = 9000 mg
- The recipe will require 9000 mg in order to serve 10 people
Now there are 1000 mg in 1 g, so converting mg to g we have 9000 mg is equivalent to 9 grams
Answer:
We need a sample size of 564.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
For this problem, we have that:

The margin of error is:

95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.
We need a sample size of n
n is found when 
So






Rounding up
We need a sample size of 564.