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strojnjashka [21]
2 years ago
8

Is 4x + 53 = y a function or not a function?

Mathematics
1 answer:
Evgen [1.6K]2 years ago
3 0

Answer:

I'm pretty sure its a function sorry if i'm wrong.

Step-by-step explanation:

pls mark brainliest

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PLEASE HELP!!This is joshs solution for the equation x^2-6x-7=0: x^2-6x-7=0
iren [92.7K]

Answer:

  no. see below

Step-by-step explanation:

This much of Josh's working is correct:

  x^2-6x=7

  x^2-6x+9=7+9

  (x-3)^2=16

At this point Josh apparently overlooked the fact that he needed to take the square root of both sides of the equation. Had he done that, he would have ...

  x -3 = ±4

  x = 3+4 . . . or . . . 3 -4

  x = 7 or -1

_____

Josh reported values of x that would match ...

  x -3 = ±16

He <em>violated the equal sign</em> by taking the square root on the left, and multiplying by ±1 on the right. Doing different operations on the two sides of the equation will mean the value of x is changed to something other than what you're looking for.

4 0
2 years ago
HELPPPPPPP asap<br> Condense each expression.<br> show work
Karolina [17]

Answer:

No question?

Step-by-step explanation:

6 0
2 years ago
This week, 967 people went to the beach. Last week, 1,189 people went to the beach. The number of people who went to the beach f
zhenek [66]

Answer:

Less than 25%

Step-by-step explanation:

1189 divided by 967 is 1.229576008...

1.229576008... multiplied by 967 is 1189

This number, 1.229576008..., is a multiplier

To be exact it increases by 22.9576008...%

That is less than 25%

6 0
2 years ago
Read 2 more answers
Substitution y=2x-1<br> Y=-3x-6
Mice21 [21]
-3x-6=2x-1
5x=-5
x=-1

y=-3(-1)-6
y=3-6
y=-3

hope this helps!
6 0
2 years ago
Read 2 more answers
Can someone please help I need a clear explanation on how to solve this equation.
nikitadnepr [17]
B = amount of students who chose Bulldog

n = amount of students who chose lion

t = amount of students who chose tiger

so.. "t" chose tiger, ok

"<span>Four times as many students chose Bulldog as chose Tiger"
namely, if "t" chose tiger, then 4 times that many chose Bulldog, thus

b = 4t

"</span><span>Twice as many students chose Lion as chose Tiger"
namely, if "t" students chose tiger, twice as many chose lion

n = 2t

now, we know a total of 273 students were surveyed, thus

</span>\bf \begin{cases}&#10;b+n+t=273\\&#10;\boxed{4t}+\boxed{2t}+t=273&#10;\end{cases}&#10;\\\\\\&#10;7t=273\implies t=\cfrac{273}{7}\impliedby \textit{that many chose \underline{tiger}}<span>
</span>
6 0
3 years ago
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