What are the solutions to the equation x2 + 6 = 87? A. –9 and 9 B. –10 and 10 C. –6 and 6 D. The equation has no solutions.

Answers

Answer 1

Answer: $x^2 + 6 = 87 \ \ | -87\n \nx^2 + 6 -87 = 0 \n \n x^2 -81 = 0 \n \n(x+9)(x-9)=0 \n \n x+9 =0 \ \ \vee \ \ x-9 =0 \n \n x= -9 \ \ \vee \ \ x= 9 \n \n\nAnswer : \ A.) \ \ -9 \ \ and \ \ 9$

$a^2 - b^ 2 =(a-b)(a+b)$

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What are the like terms in the expression ? 9a - 3b + 4ab

What is the solution to the system of equations?x + y = 5
x - 2y = 2

(_,_)

Answers

{ x + y = 5 * ( 2 )
x - 2y = 2

2 x + 2 y = 10
x - 2 y = 2
_____________
3 x = 12

x = 12 / 3

x = 4

For y :

x + y = 5

4 + y = 5

y = 5 - 4

y = 1

S = ( 4, 1 )

hope this helps!

Multiply the second equation by -1 and add them together.

You get 3y=3
So y=1.

If y=1, x+1=5.
So, x=4.

(4,1)

Why can't a triangle have more than one obtuse angle

Answers

An "obtuse" angle is an angle that's bigger than 90 degrees.
So two obtuse angles would add up to more than 180 degrees.

But the three angles inside a triangle always add up to exactly 180 degrees.
So two of them can't be obtuse.

Can you simplify 5 over 36

Answers

No you can not simplify 5 over 36 you can immediately tell if it can be simplified by looking to see if it is a multiple in this case 5 is not a multiple of 36.

It is already simplified you can go any further

Carmen trains 2 dogs at a time to roll over and to fetch . if rolling over takes 10.3 min and fetching takes 0.25 min . which expression determine how many days to train 4 dogs 4×(10.3+0.25) or[2×(10.3 +0.25)]×2 or 2 x (10.3+0.25)
thanks

Answers

4×(10.3+0.25) is the correct answer

Heres 1. Use the table and the graph to answer the questions.
(a) What is the rate of change for each function? Show your work.
(b) Which function has the greater rate of change?
can you help me do these things

Answers

For the rate of change of Function 1, it is 2 because when I did delta y over delta x (3/-1)-(5/-2) i got negative 2 over negative 1. Two negatives equal a positive. For the rate of change of Function 2, it is 4. I picked two points that can even meet. Then I use the formula of rise over run to comes out as 4/1 simplified to 4. So Function 2 has the greater rate of change.

Answer:

The rate of change of first function is -2.

The rate of change of second function is 4.

Function 2 has greater rate of change.

Step-by-step explanation:

If a line passes through two points $(x_1,y_1)$ and $(x_2,y_2)$ , then the formula for rate of change is