Use the quadratic formula to solve the equation. X^2-7x-6=0

Answers

Answer 1

Answer: x = -1
x = -6
is that one of the options?

Answer 2

Answer: your answer is $(7+- √(73) )/(2)$

or 7+- squareroot 73/2

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Which sequence is modeled by the graph below?coordinate plane showing the points 2, 1; 3, 2; 4, 4; and 5, 8

an = one half(2)n − 1
an = 2(2)n − 1
an = 4(−2)n − 1
an = 2(one half)n − 1

Answers

First, we inspect what type of sequence is the order of the coordinates:
a2 = 1
a3 = 2
a4 = 4

Getting the difference,
a3 - a2 = 1
a4 - a3 = 2

The differences are not equal; hence, the sequence is not arithmetic.

Getting the ratio:
a3/a2 = 2
a4/a3 = 2

The common ratio is 2. Using the general form for a geometric series:
an = a1 r^(n-1)
If n = 2
1 = a1 (2)^(2-1)
a1 = 1/2

So,
an = (1/2) (2)^(n-1)

The answer is the first option.

Answer:

an = one half(2)n − 1

If the measure of <5 = 102° then the measure of <8 = what

Answers

Answer: 163.2°

Step-by-step explanation:

Solve the system of equations algebraically. Show all of your steps.
y=x^2+2x
y=3x+20

Answers

do you have to get both x and y?

Answer:

x = -4

Y = 8

Step-by-step explanation:

Let f(x)=7x3−2x−12and g(x)=−3x3−8x2+10xWhat is the function rule for (f+g)(x) ?

A. (f+g)(x)=4x6−8x2+12x−12

B. (f+g)(x)=4x6−8x2+8x−12

C. (f+g)(x)=4x3−8x2+8x−12

D. (f+g)(x)=4x3−12x2+8x−12

Answers

You just combine add like terms in the equations so your answer would be C.

A stereo costs £320. In a sale it is reduced by 25%. What is the sale price?

Answers

$320* (75)/(100) =320 * (25* 3)/(25* 4) =320* (3)/(4) = 80* 4 * (3)/(4) =80* 3 = \boxed {240}$

How many sides does a polygon have if the sum of its angle measures is 2700 degrees and how do you find this?

Answers

$the\ sum\ of\ angle\ measures\ is\ 2700^0\n\n(n-2)\cdot180^0=2700^0\nn-the\ number\ of\ the\ sides\ of\ the\ polygon\n\nn-2= (2700)/(180) \ \ \ \Rightarrow\ \ \ n-2=15\ \ \ \Rightarrow\ \ \ n=17\n\nAns.\ 17\ sides\ of\ the\ polygon.$

The number of angles equal the number of sides

The number of angles calculate: (n-2)x180°

(n-2)x180°=2700° |divide both sides by 180°

n-2=15 |add 2 to both siedes

n=13

Answer: 13 sides.

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Round off 17.2 to one significant figure

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