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SIZIF [17.4K]
3 years ago
13

1. If 31 – 7 = 51, then 61 = A. 21 B. -7 C. -21 D. 42

Mathematics
1 answer:
Archy [21]3 years ago
8 0

Answer:

WTH is this? none of it makes and sense

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Select the relations that are functions.
Arlecino [84]

Answer:

Depending on how the input of each function defined,

  • The first choice \left\lbrace(a, 1),\, (6, 1), \, (C, 1)\right\rbrace,
  • The third choice \left\lbrace(1, a),\, (2, a), \, (3, a)\right\rbrace
  • The fourth choice \left\lbrace(a, a),\, (b, b), \, (c, c)\right\rbrace

might be functions.

Step-by-step explanation:

A function between two sets (domain and range) should

  • be defined for all elements in the domain, and
  • map each element from the domain to exactly one element in the range.

The second choice can't be a function since the element a from the domain is mapped to more than one element in the range.

Keep in mind that a function should be defined for all elements in its domain. For the first relation to be a function, its domain needs to be \lbrace a,\, 6, \, C\rbrace. Similarly, the domain for the third and fourth relations should be \lbrace 1,\, 2, \, 3\rbrace and \lbrace a,\, b, \, c\rbrace

8 0
3 years ago
Write the equation in standard form 4x-3=5y
just olya [345]

4x-3=5y

it would be : 4x - 5y = 3

8 0
3 years ago
Read 2 more answers
What is an equation that goes through the point (-7, 10) and is perpendicular to the line -2x-4y=9
algol13

Step-by-step explanation:

m1.m2= -1

(4y = -2x -9)= (y = -1x/2 -9/4)

-1/2.m2= -1

m2 = 2

formula = y - y1 = m2 ( x - x1)

y - 10 = 2 ( x - (-7))

y - 10 = 2x + 14

y = 2x + 24

7 0
3 years ago
Which explains the error Krista made?
MariettaO [177]
A is the right option! Because 0.40 should be in second equation with the x to represent the number of stamps multiply by 40 cents.
4 0
3 years ago
Which method would prove the quadrilateral is a parallelogram?
Maurinko [17]

Answer:

Answer: Each pair of opposite sides has the same measure. Therefore, they are congruent. If both pairs of opposite sides of a quadrilateral are congruent, the quadrilateral is a parallelogram.



3 0
3 years ago
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