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lys-0071 [83]
3 years ago
13

Mrs. Kremer uses a 15% off coupon when she buys a camera. The original price of the camera is $225.How much money did she pay fo

r the camera?
Mathematics
1 answer:
Murrr4er [49]3 years ago
3 0

Answer:

$191.25

Step-by-step explanation:

15% of $225

15% × $225

$33.75

$225 - $33.75

$191.25

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Please help, I will mark!!
Alik [6]

Answer:

d=28.28

Step-by-step explanation:

To calculate the lenght of the diagonal d across the square, we can assume that the square it is compound of two right triangles. So, we can resolve this exercise using The Pythagorean Theorem.

<em>The Pythagorean theorem</em> states that in every right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the respective lengths of the legs. It is the best-known proposition among those that have their own name in mathematics.

If in a right triangle there are legs of length a and b, and the measure of the hypotenuse is c, then the following relation is fulfilled:

a^{2} +b^{2} =c^{2} a is the height, b is the base, and c is  

the hypotenuse.

To obtain the value of the hypotenuse

c= \sqrt{a^{2} +b^{2} }

To find the value of the lenght of the diagonal d across the square, we have:

d=\sqrt{a^{2} +b^{2} } Where a = b = 20

Substituting the values

d=\sqrt{(20)^{2} +(20)^{2} }\\d=\sqrt{400+400} =\sqrt{800} \\d=28.284

Round the answer to 2 decimal places

d=28.28

6 0
3 years ago
Multiply the expression 2(x+1)(2x-5)
Sedbober [7]
This gives you the answer, look at it tells you how to solve this and get your answer

8 0
3 years ago
I need help i will give the brainliest
arlik [135]

Answer:

the answers are

13) -6

14) 6

15) -5

16) 3

17) 14

18) -4

19) -15

20) 4

21) 5

22) -12

3 0
3 years ago
The simple interest I on an investment of P dollars at an interest rate r for t years is given by I = prt. Find the time it woul
goldenfox [79]
T=i/pr
t=900÷(21,000×0.046)
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3 0
3 years ago
Read 2 more answers
Find the unit rate.<br> 180 miles in 3 hours<br> The unit rate is<br> miles per hour.<br> Pls hurry
Natali [406]

Answer:

60 miles per hour

Step-by-step explanation:

Consider the structure of the wording: "miles per hour"

The word "per" means for each. There is you clue.

Each is, one of and one of is unit measurement

So the controlling element in this question is that you need to convert the 3 hours into 1 hour.

Using ratio properties

180

3

=

x

miles

1

hour

We need to 'force' the left hand side into the same form as the right. That is: we need to convert the denominator into 1 and see what happens to the numerator.

⇒

180

÷

3

3

÷

3

=

x

1

⇒

60

1

=

x

1

So the unit rate of speed is  

60

miles  

per

−−−  

hour

4 0
2 years ago
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