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mr_godi [17]
3 years ago
10

13. Today, everything at a store is on sale. The store offers a 20% discour

Mathematics
1 answer:
Ray Of Light [21]3 years ago
3 0

Answer:

0.8

Step-by-step explanation:

Given,

Price of an item = X dollars

Discount = 20%

Amount of discount = 20% of Price of item

Amount of discount = \frac{20}{100}*X=0.2X10020∗X=0.2X

Price of item after discount = Price of item - Amount of discount

Price of item after discount = X-0.2X = 0.8X dollars

The discount price will be 0.8x dollars

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The number of walls, w, that Joe can paint in t hours is given by the equation w=32t−1. Answer the questions below.
klio [65]

We have been given an equation w=\frac{3}{2}t-1 that represents umber of walls, w, that Joe can paint in t hours. We are asked to find the number of hours it will take Joe yo paint 7 walls.

To solve our given problem, we will substitute w=7 in our given equation as:

7=\frac{3}{2}t-1

Let us solve for t.

7+1=\frac{3}{2}t-1+1

8=\frac{3}{2}t

8\cdot\frac{2}{3}=\frac{2}{3}\cdot\frac{3}{2}t

\frac{8\cdot2}{3}=t

\frac{16}{3}=t

Therefore, it will take \frac{16}{3} hours Joe to paint 7 walls.

3 0
3 years ago
Find the limit as limit x->0, tan2x/x
kiruha [24]
We are given with the expression <span>tan2x / x</span> and asked to evaluate the expression to limit as theta approaches zero. In this case, we substitute first zero. The answer is zero over zero. This  is indeterminate so we derive the terms accdg to L'hopital's rule. The derivative is 2 sec^2 2x/1. cos 2x is 1 so is sec^2 2x. Hence the answer is 2.
3 0
3 years ago
for a survey,a company decided to call 7 out of every 5,000 people.how many people should be called in a town of 78,000 people
jenyasd209 [6]
109 would get called

4 0
3 years ago
What would be the answer to this question. PLEASE EXPLAIN.
Rzqust [24]

You can describe the domain by every possible x value in the function, since that function has a vertical intersection line which means the x value will never pass it on the negative side, the domain would be from -2 to all the postive numbers, X > -2 or (-2,∞).

For the range, simply it's all the possible y values. In that function it's impossible to go under 0 or negative value. That means the range would be Y>0 or (0,∞).

If you want to know if it's a function or not you could try the vertical line test, select any x value and draw straight line on it, if the line crosses 2 y points in the same x value it wont be a function, In your case each x value has it's own Y value.

So the answer is Domain x>-2; Range y>0; Yes, it is a function

8 0
3 years ago
Let A = {a, b, c, d, e} and B = {a, c, f, g, i}. Universal Set: ∪= {a,b,c,d,e,f,g,h,i}
mixer [17]

Answer:

1. { a, b, c, d, e, h }

2. { f, g, i }

Step-by-step explanation:

Given sets,

A = {a, b, c, d, e},

B = {a, c, f, g, i}

Universal set , ∪ = {a, b, c, d, e, f, g, h, i},

1. Since, B^c = elements of universal set which are not in set B

=  U - B

= { b, d, e, h },

Thus,

A\cup B^c = All elements of A and B^c

= { a, b, c, d, e, h }

2. B - A = elements of set B which are not in set A

= { f, g, i }

4 0
3 years ago
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