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JulijaS [17]
3 years ago
7

Can someone help me with number 2. Please explain your answer.

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0
4x+y = 20
3x+y = 2
4x+y-3x-y = 20-2
x = 18

3x+y = 2
3.18 + y = 2
54 + y = 2
y = -52
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2 years ago
If y is directly proportional to x and when y = 35, x = 140, what is the value of x when y = 70?
levacccp [35]

Answer: 280 = x


Step-by-step explanation: Okay you are using this equation! y = kx But you must rearrange it!

When rearranged you get y/x = k

Plug in x and y!

y/x = k

35/140 = k

0.25 = k

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6 0
3 years ago
Give f(x) = X2 + 3x-1, find b) f(-1)​
nikklg [1K]

Answer:

-3

Step-by-step explanation:

f(x)= x²+3x-1

f(-1)= (-1)²+3(-1)-1

= 1-3-1

= -2-1

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7 0
3 years ago
Calculate the mean, median, and mode of the following set of data. Round to the nearest tenth. 10, 1, 10, 15, 1, 7, 10, 10, 1, 6
klemol [59]
First order the data: 
1, 1, 1, 6, 7, 10, 10, 10, 10, 13, 15
the mean is all the numbers added together divided by how many there are, 1 + 1 + 1 + 6 + 7 + 10 + 10 + 10 + 10 + 13 + 15 = 84    84/11 = 7.636364 ≈ 7.6
the median is the number in the middle of the list, count numbers from each end, until you either have one or two left, if one left then its that one, if two left then its half way between the two
the median for your set is 10
The mode is the most common number, in your set 10
5 0
3 years ago
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