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3 years ago

16 What value could you put in place of the x to make it a function? * (8, 7) (7,-6) (-4,5) (x, 9)

Mathematics

1 answer:

Tresset [83]3 years ago

6 0

Answer:

Step-by-step explanation:

You can't have a repeated x-value in a function.

8 is taken by (8, 7)

7 is taken by (7,-6)

-4 is taken by (-4, 5)

9 is the only number that is not taken by any other point yet.

Remember that for a relationship to be a function it can't have repeated x-values. However, it doesn't matter to have the same x and y values!

Hope this helped!

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PLEASE HELP ME WITH GEO TEST!

pantera1 [17]

Answer:

The first one is ur answer

Step-by-step explanation:

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3 years ago

Read 2 more answers

Which would be the best method to use to solve the following equations? Explain your reasoning.

o-na [289]

A. square root property

$3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}$

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

$x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0 and x-3=0\\x= -2 \\x= 3$

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

$x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7$

same reason personal preference

D- Quadratic

$x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402$

the 17 kinda threw me off and i didnt wanna get on factorising or doing completing the square so quadratic formal

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3 years ago

How to do question 4?

Nutka1998 [239]

Marie states that any integer greater than 4 will always get an even number of factors.

This can be proven wrong by (for example) 12.

12 has these factors:

1 x 12
2 x 6
3 x 4

12 has an ODD number of factor pairs.

Another example is 28.

28:
1 x 28
2 x 14
4 x 7

28 has an odd number of factor pairs.

I hope this helps!

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4 years ago

Ashley needs 4.6 yards of chain to hang some flower baskets. The chain is sold by the meter. How many meters does Ashley need?

slega [8]

1yard=0.9144m
multily both sides by 4.6
4.6yards=4.20624m

4.2meters about

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3 years ago

d) find the function A(x) which is the average cost of a case of juice when x cases are produed per month. state the domain. 

Lerok [7]

Just divided 1.3/100 and it gives you 0.013

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4 years ago