All categories

3 years ago

In the figure shown DE = 7x-13 and DF =3x+3 what is the length of DF?

Mathematics

1 answer:

Phoenix [80]3 years ago

7 0

Answer:

The length of DF is 15

Step-by-step explanation:

Since the two lines are equal, which is given by the markings on the triangle, then you can set the two lengths equal and find x.

7x - 13 = 3x + 3

4x - 13 = 3

4x = 16

x = 4

Now that we know x = 4, we can plug into the DF length to find its amount.

DF = 7x - 13

DF = 7(4) - 13

DF = 28 - 13

DF = 15

You might be interested in

Help I will give all the good stuff to you if you help me!

Law Incorporation [45]

Answer:

I think it is triangle, pentagon, heptagon, decagon

5 0

3 years ago

1) Who in your class has the most pets?

Bess [88]

Answer:

How many siblings does the average 6th-grade student have?

Step-by-step explanation:

In order to know the average, you need to collect all the amounts of siblings 6th grade students have and then you need to add them all together and divide by how much numbers there are and you'll get your average.

6 0

3 years ago

Amanda started the week with $200 in her bank account. Then she deposited $300 she earned from a garage sale. What was the final

Doss [256]

500 dollars 300+200=500

3 0

3 years ago

Read 2 more answers

Rate of change of rational functions

densk [106]

Answer:

0.635

Step-by-step explanation:

$rate~of~change = \dfrac{f(x_2) - f(x1)}{x_2 - x_1}$

$x_1 = 0$ $x_2 = 0.3$

$f(x) = \dfrac{-7x^3}{x^4 - 1}$

$f(x_1) = f(0) = \dfrac{-7(0)^3}{(0)^4 - 1}$

$f(x_1) = \dfrac{0}{-1} = 0$

$f(x_2) = f(0.3) = \dfrac{-7(0.3)^3}{(0.3)^4 - 1}$

$f(x_2) = \dfrac{-0.189}{-0.9919} = 0.190543$

$rate~of~change = \dfrac{0.190543 - 0}{0.3 - 0} = 0.635$

5 0

3 years ago

It’s geometry 10th grade..pls

nydimaria [60]

It’s b because I just did that question

8 0

3 years ago