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Zinaida [17]
3 years ago
12

Which step is not necessary when solving this system of equations by graphing? 3x-y=4 x+y= -4

Mathematics
2 answers:
puteri [66]3 years ago
6 0

Answer:

determine the shaded area for each line

Step-by-step explanation:

its not need

lions [1.4K]3 years ago
3 0

Answer: The answer is C: determine the shaded area for each line.

Just took the test on Edg.

Step-by-step explanation:

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kykrilka [37]

Answer:

your bo**bs are so far wooooooooooooooooow!!!!

6 0
3 years ago
3 years ago a father was 3 times as old as his son, in five years time he will be twice as old as his son, what will be the sum
ivolga24 [154]

Answer: 46 years

Step-by-step explanation:

Let the father's age be x and the son's age be y, then 3 years ago:

Father = x - 3

son     = y - 3

Then , from the first statement :

x - 3 = 3 ( y - 3 )

x - 3 = 3y - 9

x     = 3y - 9 + 3

x     = 3y - 6 .......................................... equation 1

In five years time

father = x + 5

son = y + 5

Then , from the second statement

x + 5 = 2 ( y + 5 )

x + 5 = 2y + 10

x       = 2y + 10 - 5

x       = 2y + 5 ........................ equation 2

Equating equation 1 and 2 , we have

3y -6 = 2y + 5

add 6 to both sides

3y = 2y + 5 + 6

subtract 2y from both sides

3y - 2y = 11

y = 11

substitute y = 11 into equation 1 to find the value of x

x = 3y - 6

x = 3(11) - 6

x = 33 - 6

x = 27

This means that the father is presently 27 years and the son is presently 11 years.

In four years time

father = 27 + 4 = 31

son = 11 + 4      = 15

sum of their ages in four years time will be

31 + 15 = 46 years

5 0
3 years ago
Read 2 more answers
Given log3 2=0.631 log3 7=1.771 what is log3 14?
Leni [432]
In logarithm, inverse operations are applied.
log_3{14} =  log_3{7} +   log_3{14} \\ log_3{14} = 0.631 + 1.771 \\log_3{14} = 2.402
5 0
3 years ago
Read 2 more answers
Hope someone can help me with this
AVprozaik [17]

Area of a Circle = PI * radius^2

= 3.14 * 1.8^2

= 3.14 * 3.24

= 10.17 meters^2


3 0
3 years ago
Given f(x)=x^3+kx-4, and x-1 is a factor of f(x), then what is the value of k?
Darina [25.2K]

Answer:

3

Step-by-step explanation:

If x-1 is a factor, then x=1 is a solution. So:

0=1³+1k-4

1k=3

k=3 .........

3 0
3 years ago
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