Beth takes measurements of her door . The diagonal line is 12 ft and the base is 4 ft . what is the height of her door?

4. If DF = 9x - 39, find EF. Help I’m so confused!!!!

topjm [15]

Answer:

EF =58

Step-by-step explanation:

from the illustration,

EF =DF - DE

given that DF =9x-39 , DE =47 EF=3x +10

substitute them into the formula,

3x +10=9x-39 - 47

solving for x

3x +10 =9x -86

grouping like terms

3x - 9x =-86 -10

-6x=-96

dividing through by -6

 $\frac{ - 6x}{ - 6} = \frac{ - 96}{ - 6}$ 

 $x = \frac{96}{6}$ 

 $x = 16$ 

but EF=3x+10

substitute x=16 into it to get the EF

EF= 3(16)+10

EF=48+10

EF=58

6 0

2 years ago

Read 2 more answers

Two numbers with a sum of one

dimulka [17.4K]

Answer:

.5 and .5, .75 and .25, ect

5 0

2 years ago

Read 2 more answers

(1/2 + 3/2)² + (2/3 x 1/2)³

docker41 [41]

The result of the mathematical expression given as follows: (1/2 + 3/2)² + (2/3 x 1/2)³ is 5.59 or 5⅔.

<h3>How to calculate mathematical expressions?</h3>

According to this question, the following expression is given to solve: (1/2 + 3/2)² + (2/3 x 1/2)³

First, we solve the both parts as follows:

½ + 3/2 = 2
⅔ + ½ = 1..16

Next, we solve the exponential function as follows:

= (2)² + (1.16)³

= 4 + 1.59

= 5.59 or 5⅔

Therefore, the result of the mathematical expression given as follows: (1/2 + 3/2)² + (2/3 x 1/2)³ is 5.59 or 5⅔.

Learn more about mathematical expression at: brainly.com/question/1703934

#SPJ1

5 0

1 year ago

Rick purchased a rectangular computer monitor that measures 16 inches tall by 22 inches wide. He wants to know the diagonal meas

guapka [62]

Answer: 27.2

Step-by-step explanation:

A squared + B squared = C squared 22 is A squared and 16 is B squared and C squared is the hypotenuse and that is what we are figuring out

22squared= 484 and 16 squared=256 484+256=740 and 27.2 squared is 740 I hope this helps

4 0

2 years ago

Part C Now try this one. Write a description of the partitioned function using known function types, including transformations.

Sever21 [200]

Answer:

Following are the function description to the given question:

Step-by-step explanation:

In the given-question, three functions are used, that can be defined as follows:

In function 1:

This function is also known as the modulus on the absolute value function, for example:

$f(x)=| x| \left \{ {{x , \ \ \ x>0} \atop {-x, \ \ \ \x$

In the given in the above graph, that is $f(x) = -x , \ \ x$

In function 2:

In this function, It is an algebraic function that is $y=x^2$

It is also a part of the quadratic polynomial function, and its value is $y=x^2 , \ \ \ x> 0$

In function 3:

In this function, it is the cubic polynomial equation that's value is $y=x^3$

In the graph its value is:

$y=-x^3\\\\and \\ \\\to y= f(x) \\\\ \to y=-f(x)\\$

6 0

2 years ago