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3 years ago

Solve by completing the square with working out -6x-x^2-8

Mathematics

1 answer:

Goryan [66]3 years ago

7 0

-6x-x^2-8 = -(x+2) x (x+4)

(This is if you are factoring the expression)

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Aleka and Helene both opened savings accounts that earn 2.5% interest a year. Aleka puts $2,500 into her account. Helene put $1,

Xelga [282]

Given:

Amount in Aleka and Helene accounts represented by the following function:

Aleka: $f(x) = 2500(1.025)^x$

Helene: $g(x) = 1500(1.025)^x + 200x$

To find:

The function represents the difference, $h(x) = f(x) -g(x)$ , between the value of Aleka's and Helene's total savings after x years.

Solution:

We have,

$f(x) = 2500(1.025)^x$

$g(x) = 1500(1.025)^x + 200x$

Now,

$h(x) = f(x)-g(x)$

$h(x) = 2500(1.025)^x-[1500(1.025)^x + 200x]$

$h(x) = 2500(1.025)^x-1500(1.025)^x - 200x$

$h(x) = 1000(1.025)^x - 200x$

Therefore, the correct option is C.

8 0

3 years ago

I need help with 3 and 4

frosja888 [35]

Answer:

Step-by-step explanation:

3) G

Step-by-step explanation:

Q(-1,-1) R(3,1) S(2,-4)

x+2 y+3 translation then rotation 180 (x,y) be (-x,-y)

Q -1+2 -1+3 (1,2) (-1,-2)

R 3+2 1+3 (5,4) (-5,-4)

S 2+2 -4+3 (4,-1)

4 0

3 years ago

Which expression is not a polynomial? 11p-7q 8xy^4-5x^3y 2-x -4/y

kkurt [141]

A polynomial is an expression that has two or more than terms. These terms are separated by an operation. Only -4/y is not a polynomial. It is a monomial. Monomial is not a polynomial.

3 0

2 years ago

Find the slope Thxxxx

Helga [31]

Answer:

-The slope:

$m = \frac{3}{2}$

Step-by-step explanation:

-To find the slope, you need this trick:

$m= \frac{rise}{run}$

-So, according to the graph, start to the first doted point which is (0,1) to get to the second doted point, which is (2,4) on the graph, by counting how far up and how far across:

Rise: 3

Run: 2

$m= \frac{3}{2}$