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enyata [817]
3 years ago
13

Please help and show your work, will mark brainliest

Mathematics
1 answer:
Alja [10]3 years ago
8 0

Answer:

y = -2x + 9              y =1/9x + 4/9

Step-by-step explanation:

-9/2 = -x -1/2y

-1/2y = x - 9/2

y = -2x + 9

-4 - x = -9y

-9y = -4 - x

y = 1/9x + 4/9

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The relationship between x and y is proportional. When x is 3, y is 51. What is x when y is 204? Enter your answer in the box.​
JulsSmile [24]

Answer:

12

Step-by-step explanation:

Use the relation between 3 is to 51

eventually... you will

5 0
3 years ago
Five students wrote a mathematics test. The average mark was 68. If the marks for four of the students were 75, 62, 84 and 53, t
konstantin123 [22]

Answer:

66

Step-by-step explanation:

Use the formula for the mean of a set of numbers:

                  sum of the numbers

average = --------------------------------

                     count of numbers

Here we know that the average mark was 68, so we can write:

               

                           75 + 62 + 84 + 53 + x

average = 68 = ----------------------------------

                                           5

or                            274 + x

                  68 = -------------------

                                    5

Solving for x, we multiply both sides by 5:     340 = 274 + x.

Subtracting 274 from both sides effectively isolates x:

 340 = 274 + x

- 274    -274

------------------------

  66      =    x

The fifth student's mark was 66.

4 0
3 years ago
8 with a exponent of 2 +7
Lyrx [107]

Answer:

71

Step-by-step explanation:

8²=64

64+7=71

I hope this helps!

8 0
3 years ago
Read 2 more answers
What’s the x axis of -4x+8y=-16
balu736 [363]

Answer:

4

Step-by-step explanation:

When need to find x axis y is =0

So now you can find x

The answer of x is equally to the xaxis.

If need to find y axis then please let x =0.

4 0
3 years ago
A shopkeeper buys a dress for $40
DanielleElmas [232]

Answer:

48 - 40 = $8, there is a $8 dollar increase.

Formula for change of percentage;

changed price

___________ x 100% (100/100)

original amount

Replace those values with the values we found;

40/48 x 100/100 = 20% increase.

4 0
2 years ago
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