3 years ago

Factor and solve the equation

1 answer:

8 0

$y=4x^2-64=4(x^2-16)=4(x^2-4^2)=4(x-4)(x+4)\\\\-------------------------------\\\\4(x-4)(x+4)=0\iff x-4=0\ or\ x+4=0\\\\x=4\ or\ x=-4$

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lord [1]

Answer:

Step-by-step explanation:

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6 0

3 years ago

Read 2 more answers

Which ordered pairs are solutions to the inequality 2x+y>−4?

alexgriva [62]

Answer:

The ordered pairs are (5,-12), (-1,-1).

Step-by-step explanation:

Given : Inequality $2x+y>-4$

To find : Which ordered pairs are solutions to the inequality ?

Solution :

We put the given options the point which satisfied the equation is the solution.

Inequality $2x+y>-4$

1) (5,-12)

$2(5)+(-12)>-4$

$10-12>-4$

$-2>-4$

It is true.

2) (-1,-1)

$2(-1)+(-1)>-4$

$-2-1>-4$

$-3>-4$

It is true.

3) (-3,0)

$2(-3)+(0)>-4$

$-6+0>-4$

$-6>-4$

It is false.

4) (4,-12)

$2(4)+(-12)>-4$

$8-12>-4$

$-4>-4$

It is false.

Therefore, The ordered pairs are (5,-12), (-1,-1).

4 0

4 years ago

Three of four numbers have a sum of 22. If the average of the four numbers is 8, what is the fourth number? a) 4 b) 6 c) 8 d) 10

kogti [31]

Answer:

Step-by-step explanation:

First you do 8 × 4, this gives the total of the four numbers.

$8 \times 4 = 32$

Then, subtract the total of 3 of the numbers from the total of 4 of the numbers.

$32 - 22 = 10$

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In The early months of some year one site added .4 million new accounts every day at this rate how many days would be needed to

sergeinik [125]

It would take 8 days

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3 years ago

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Basile [38]

Answer: graph A

Step-by-step explanation:

The linnear equation has the following form:

y = a*x + b

Now b always represents the point where the y axis is crossed by the line. In this case, it's y= 3, the only one which has that point ir graph A.

6 0

4 years ago