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marysya [2.9K]
2 years ago
15

Solve the system of equations 15x -2y = 4 20x - 3y = 1

Mathematics
1 answer:
makkiz [27]2 years ago
3 0

Answer: try internet

Step-by-step explanation:

sorry

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1 of 10Give the property that justifies each step.5(2 + 10)20Given52 + 50 = 2057 = -30N2-6o- Addition Property of Equality:: Sub
Elan Coil [88]
Properties5(2 + 10)20
8 0
1 year ago
6) Solve: 7 = x + 12 A) -19 B) -5 C) 4 D) 5
murzikaleks [220]

Answer: B) -5

Step-by-step explanation: all you do is subtract 12 from each side and you will get -5

7 0
3 years ago
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A new phone costs $230 and the sales tax rate is 7%. What is the total cost of the camera after tax?
rosijanka [135]

That's a question about percentage.

One way to represent percentage is using decimal number. In this way, 1 is equivalent to 100% and the other less percentages using numbers between 0 and 1.

Examples:

  • 90% is equivalent to 0,90.
  • 5% is equivalent to 0.05. It's not 0.5 because 0.5 is equivalent to 50%.
  • 13.17% is equivalent to 0.1317.
  • 245% is equivalent to 2.45.

If we want to know the percentage of a number, we should multiplacate the number by the porcentage in the decimal number form.

Examples:

  • 55.90% of 200 is equal to: 200 \times 0.5590 = 111.8
  • 360% of 88 is equal to: 88\times 3.6 = 316.8

In our problem, we have a phone with a increase of 7%. To solve that, it's important to perceive that $230 is equal to 100% and with a increase of 7%, we will pay 107%.

107% in the decimal number form is 1.07. With that information, we should multiplicate 1.07 by the original value and we will find the answer.

We know that 230\times 1.07 = 246.1, therefore, the total cost of the phone after tax is $246.1.

I hope I've helped. :D

Enjoy your studies. \o/

4 0
3 years ago
Can someone help me, im really stuck.
tresset_1 [31]

Answer:

(x/4) +1 OR (4/x)+1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
It's a. not sure if its B. I'll give branliest!
atroni [7]

Answer:

P is complementary to x

Step-by-step explanation:

Complementary means adding to 90 degrees

P+x = 90 degrees

So P is complementary to x

4 0
2 years ago
Read 2 more answers
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