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Kisachek [45]
3 years ago
5

Determine whether the representation is proportional.y= -9x

Mathematics
2 answers:
storchak [24]3 years ago
7 0
Yes it is proportional
valina [46]3 years ago
4 0

Answer:

Yes it is

Step-by-step explanation:

y=-9x means that for every x value, the y value decreases by 9, so it is proportional because the value of y decreases the same amount each time. For example, if x=1, y=-9. If x=5, y=-45, and so on.

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Solve, then check algebraically and graphically. 7x+14= 56
kari74 [83]

Answer:

x = 6

Step-by-step explanation:

7 x = 56-14

7 x = 42

7 x/7 to remain with x only = 42

then x = 6

6 0
3 years ago
what is the sum of the first 25 terms of an arithematic sequence if the sum of its 8th and 18th terms is 72?​
max2010maxim [7]

Answer:

900

Step-by-step explanation:

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3 years ago
The probability of an event not happening is
Stels [109]

the probability of an event occurring, it is easy to compute the probability that the event does not occur. If P(A) is the probability of Event A, then 1 - P(A) is the probability that the event does not occur. For the last example, the probability that the total is 6 is 5/36.

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3 years ago
Given the following number as an approximate measurement, 49.5 feet. What is the range of values for the actual value?
Elodia [21]

Answer:

range is 2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Help again and thanks..........
LenKa [72]

Answer:

  • a = $8
  • s = $5

Step-by-step explanation:

When the coefficients don't lend themselves to solution by substitution or elimination, then Cramer's Rule can be useful. It tells you the solutions to

  • ax +by = c
  • dx +ey = f

are ...

  • ∆ = bd -ea
  • x = (bf -ec)/∆
  • y = (cd -fa)/∆

Using that rule here, we find ...

  ∆ = 5·3 -6·2 = 3

  a = (5·54 -6·41)/3 = 5·18 -2·41 = 90 -82 = 8

  s = (41·3 -54·2)/3 = 41 -18·2 = 5

This math can be performed in your head, which is the intent of formulating the rule in this way.

_____

Similarly, if you expect the solutions to be small integers (as here), then graphing is another viable solution method.

_____

<em>Comment on the question</em>

We're sad to see than only 16 tickets were sold to the two performances by the symphonic band.

6 0
3 years ago
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