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nikdorinn [45]
3 years ago
6

* WILL GIVE BRIANLIEST*(08.03)Consider the following set of equations:

Mathematics
2 answers:
cluponka [151]3 years ago
7 0
The third choice is very useful. It's​ valid because two things that are both equal to 'y' are equal to each other, and it can be easily solved to find 'x'.
stepan [7]3 years ago
5 0

Answer:

3rd choices

Step-by-step explanation:

U can use it To find the solution the others won’t work

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A 15% discount saves you $5 off the price of an electronic game. How much do you save off the regular price if the discount is w
chubhunter [2.5K]

Answer:

The 45% off discount saves an additional $10 compared to the 15% discount for a total of $15 off regular price.

Step-by-step explanation:

We can find the original price of the game through a proportion. A proportion is an equation where two ratios or fractions are equal. The ratios or fractions compare like quantities. For example, we will compare percent over percent to an equal ratio  of $ to $. Since 15% of 100% is the same ratio as $5 to the unknown original $ price, I write:

\frac{15}{100} =\frac{5}{y}

I can now cross-multiply by multiplying numerator and denominator from each ratio.

15y=100(5)\\15y=500

I now solve for y by dividing by 15.

\frac{15y}{15} =\frac{500}{15} \\y= 33.33333....

The original price was $33.34.

Now, we can find the amount if 45% off and then then compare the two discounts. To find the percent off I can multiply by 0.45(33.34)=15. The 45% off discount saves an additional $10 compared to the 15% discount.

4 0
3 years ago
NEED HELP ASAP
ANEK [815]
I don't understand life anymore....
8 0
4 years ago
The perimeter of a rectangle is 80ft.and the length is 21ft the width of the rectangle is
laila [671]

Answer: 19 ft


Step-by-step explanation: To find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. You now have the total length for the remaining 2 sides. This number divided by 2 is the width. Hope this helps :)


3 0
3 years ago
The product of two integers is -12 and the sum is -1. What are the numbers?
kupik [55]

Answer:

+3 and -4

Step-by-step explanation:

as

+3×-4=-12

and

-4+3=-1

3 0
3 years ago
Express 33 1/2% as fraction<br><br>​
zzz [600]
First you have to multiply 2x33 which is 66 then you have to add 1 which is 67 so the answer would be 67/2 I don’t know about the percent sign though
8 0
3 years ago
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