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Roman55 [17]
3 years ago
6

Use these graphs to solve the simultaneous equations 5x-9y = -46 y = -2x

Mathematics
1 answer:
tia_tia [17]3 years ago
4 0

Answer:

(-2, 4)

Step-by-step explanation:

In the first equation substitute -2x for y, obtaining:  5x - 9(-2x) = -46

Then 5x + 18x = -46, or  23x = -46, resulting in x = -2

Since y = -2x, y = -2(-2) = 4

The solution is (-2, 4)

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(3,6) (3,7) (-2,-5) (-9,11) is it a function a relation, or both
amid [387]

It is a relation but not a function

Step-by-step explanation:

Given

(3,6) (3,7) (-2,-5) (-9,11)

First of all we have to define both terms: Relation and Function

A relation is a set of ordered pairs containing one element from each set

A relation can be a function only if there is no repetition in domain i.e. no first element in each ordered pair should be repeated.

In the given set of ordered pairs, they are relation as all the ordered pairs have two values.

While the given relation is not a function, as there is repetition in first elements of two ordered pairs i.e. 3 is repeated in (3,6) (3,7)

Hence,

It is a relation but not a function

Keywords: Functions, Relations

Learn more about functions at:

  • brainly.com/question/13219835
  • brainly.com/question/1836777

#LearnwithBrainly

6 0
4 years ago
What is the degree of the polynomial?
DIA [1.3K]

Answer:

2

Step-by-step explanation:

The degree of the polynomial is the highest exponent of an expression. When more than one variable is present, its is the sum of exponents on one term in the expression.

The polynomial has terms xy, 3x^2, -7 and x. The term with the highest exponent sum is xy or 3x^2. Both have degree 2. The degree of the polynomial is 2.

8 0
3 years ago
9 dollars for 3 cans of tuna *
Klio2033 [76]

Answer:

3 dollars for each can of tuna

Step-by-step explanation:

9-3=6

6-3=3

3-3=0

3 0
3 years ago
Read 2 more answers
Which relation is a function? Question 3 options: {(1, 2); (1, 3); (1, 4); (1, 5)} {(1, 2); (2, 3); (3, 4); (4, 5)} {(1, 2); (3,
NeTakaya

To be a function for every identical x value it has to have a different Y value. If the set has two identical X values but they have different Y values it can't be a function.

The set that is a function is:

{(1, 2); (2, 3); (3, 4); (4, 5)}

4 0
3 years ago
Of 125 students in 5th grade, 3/5 of them have a mobile phone. How many students do not have a mobile phone?
Annette [7]

Answer:75

Step-by-step explanation:125÷ 5=25

25*3=75

5 0
4 years ago
Read 2 more answers
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