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3 years ago

Find the length of each trapezoid.

Mathematics

2 answers:

ASHA 777 [7]3 years ago

8 0

Answer:

EF = 34

Step-by-step explanation:

(9x + 23)/2 = 6x + 4

9x + 23 = 12x + 8

3x = 15

x = 5

EF = 6(5) + 4 = 34

Dmitry [639]3 years ago

4 0

Answer:

ghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Step-by-step explanation:

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*PICTURE ATTACHED* please help

KIM [24]

Answer:

Step-by-step explanation:

10^0=1

10^-3 = 1/10^3

4.0=4

so : 1.72×10^0/4.0×10^-3 = (1.72× 10^3)/4 =430

scientific notation is : 4.30× 10^2

4 0

3 years ago

Directions: Write <> or = between each pair of rational numbers

rodikova [14]

Answer:

-2 5/12 > -2 3/4

-92 < -15/16

Step-by-step explanation:

8 0

4 years ago

2 more because im going broke lol

mart [117]

Answer:

thanks again man!!!! wooo

3 0

3 years ago

Read 2 more answers

REPOST!!!!!!! 15 POINTS!!!!!!!

yan [13]

Answer:

m<ACB=1/2 of m<AOB

so m<ACB=45⁰÷2

m<ACB=22.5⁰

I HOPE IT HELPS HAVE NICE DAY!

3 0

3 years ago

Read 2 more answers

Use cubic regression to find a function that fits the following points.

olasank [31]

Answer:

The cubic regression that fits the points $(x,y) =(-2,-16)$ , $(x,y) = (1,5)$ , $(x,y) = (3, 59)$ and $(x,y) =(6,440)$ is $y =2\cdot x^{3}+x+2$ .

Step-by-step explanation:

A cubic polynomial is a polynomial that has the following form:

$y = a\cdot x^{3}+b\cdot x^{2}+c\cdot x + d$ (1)

Where:

$x$ - Independent variable, dimensionless.

$y$ - Dependent variable, dimensionless.

$a$ , $b$ , $c$ , $d$ - Coefficients, dimensionless.

We construct the following system of equations to determine the coefficients of the cubic regression:

$(x,y) =(-2,-16)$

$-8\cdot a +4\cdot b -2\cdot c + d = -16$ (1)

$(x,y) = (1,5)$

$a+b+c+d= 5$ (2)

$(x,y) = (3, 59)$

$27\cdot a + 9\cdot b + 3\cdot c + d = 59$ (3)

$(x,y) =(6,440)$

$216\cdot a + 36\cdot b + 6\cdot c + d = 440$ (4)

The solution of the system of linear equations is:

$a = 2$ , $b = 0$ , $c = 1$ , $d = 2$

The cubic regression that fits the points $(x,y) =(-2,-16)$ , $(x,y) = (1,5)$ , $(x,y) = (3, 59)$ and $(x,y) =(6,440)$ is $y =2\cdot x^{3}+x+2$ .

7 0

3 years ago