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Ainat [17]
3 years ago
5

A teacher asks four students to solve the expression (-6) – 9. The table shows each student's response

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0

Answer:-15 is correct

Step-by-step explanation:

(-6)-9 is the same as -6-9 since parenthesis aren’t really needed in thins case and if you use the order of operations you go left to right. So, -6-9=-15 because a negative- a negative= a negative.

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Mario buys tickets for either 47 or 57 dollars. He purchases 14 tickets and spends 738 dollars. How many tickets did he purchase
Ivanshal [37]

Answer:

6 tickets were purchased at $47

8 tickets were purchased at $57

Step-by-step explanation:

Let the tickets purchased at $47 be x

Let the tickets purchased at $57 be y

We can form an equation from the question given which will be:

x + y = 14 ....... i

47x + 57y = 738 ........ ii

From equation i

x = 14 - y ........ iii

Substitute iii into ii

47x + 57y = 738

47(14-y) + 57y = 738

658 - 47y + 57y = 738

Collect like terms

-47y + 57y = 738 - 658

10y = 80

y = 80/10

y = 8

8 tickets were purchased at $57

Note that from i

x + y = 14

x + 8 = 14

x = 14 - 8

x = 6

6 tickets were purchased at $47

7 0
2 years ago
What is 10 as a percentage?
Marta_Voda [28]

i think its 1000%

why?

''Convert the decimal to a percentage by multiplying the decimal by 100.''

8 0
3 years ago
Read 2 more answers
4x²-y²=171 and 2x-y=9, value of 2x+y
11111nata11111 [884]
So you will need to solve for x and y before evaluating 2x+y....

2x-y=9, y=2x-9  now this will make 4x^2-y^2=171 become:

4x^2-(2x-9)^2=171

4x^2-(4x^2-36x+81)=171

36x-81=171

36x=252

x=7, now we can use 2x-y=9 to solve for y...

2(7)-y=9

14-y=9

-y=-5

y=5

now we know that x=7 and y=5, 2x+y becomes:

2(7)+5

14+5

19
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3 years ago
Please helpppp!!(:
kotykmax [81]

Answer:

200

Step-by-step explanation:

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3 years ago
If I had to choose a business to start off with I would start a lemonade stand With cookies
nadezda [96]

Answer:

When calculating startup costs, it's essential to consider both the market and the product you want to produce. In our infographic analysis, the startup cost of a lemonade stand in today's world would range from under $10 to almost $400 for a pre-fab stand ordered from the Internet and a fancy Breville juice extractor.

Step-by-step explanation:

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3 years ago
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