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aliya0001 [1]
3 years ago
5

3x - 3y = 9 for D = (0,3,8)

Mathematics
1 answer:
scoray [572]3 years ago
8 0

Answer:

3(x-y)

Step-by-step explanation:

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Write the absolute value function as a piecewise function f(x)=7|x|
Evgesh-ka [11]

Answer:

10x<9x>=-3

Step-by-step explanation:

6x +4x <-3 (5x-8>=-3

10x<-3(-3x>=-3

multiple the bracket by -3

10x<9x>-3

7 0
2 years ago
If the area of a rectangle is x^2+7x+12, what is the expression for the perimeter?
Cerrena [4.2K]

Length = 13 = (x + 3)

Width = 14 = (x + 4)

x2 + 7x + 12 = area of the rectangle

can be factored into

(x + 3)(x + 4)

Let L = one of the factors (x + 3)

Let W = the other factor (x + 4)

If x = 10 then

(10 + 3) = 13 = L

(10 + 4) = 14 = W

Checking this can be checked a couple of ways

Plug x = 10 into the original equation

x2 + 7x + 12

102 + 7(10) 12 = 100 + 70 + 12 = 182 = Area

Multiplty the factors

L x W = 13 x 14 = 182 = Area

I hope you find this useful if you have any questions please send me a message.

3 0
2 years ago
A store owner is interested in opening a second shop. She wants to estimate the true average daily revenue of her current shop t
Alex
Every confidence interval has associated z value. As confidence interval increases so do the z value associated with it. 
The confidence interval can be calculated using following formula:
\overline{x} \pm \frac{zs}{\sqrt n}
Where \overline{x} is the mean value, z is the associated z value, s is the standard deviation and n is the number of samples.
We know that standard deviation is simply a square root of variance:
s=\sqrt{315900.20}=\$562.05
The confidence interval of 95% has associated z value of <span>1.960.
</span>Now we can calculate the confidence interval for our income:
3472.00\pm \frac{1.960\cdot 562.05}{\sqrt{60}}\\ \$3472.00\pm142.22


6 0
3 years ago
Answer the question below
Lina20 [59]

Answer:

kckgkfjjfufufuf8f8ff88r8r8r8r8r8rrffufuufuff

3 0
3 years ago
3(3x+9)=-5-2x what is x
-BARSIC- [3]

Answer:

x=2.9

Step-by-step explanation:

3(3x+9)= -5-2x ( distribute)

9x+27= -5-2x (add 2x) (subtract 27)

11x= 32 ( divide by 11)

x= 2.9

3 0
3 years ago
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