3 years ago

If DE=1.5m-9 and EF=4.5m-42 what is the value of DF (equilateral triangle)

Mathematics

1 answer:

11111nata11111 [884]3 years ago

3 0

Answer:

DF = 7.5

Step-by-step explanation:

Since the 3 sides are congruent, then

EF = DE , that is

4.5m - 42 = 1.5m - 9 ( subtract 1.5m from both sides )

3m - 42 = - 9 ( add 42 to both sides )

3m = 33 ( divide both sides by 3 )

m = 11

Thus

DE = 1.5m - 9 = 1.5(11) - 9 = 16.5 - 9 = 7.5

Then

DF = 7.5

You might be interested in

Apple would like to estimate the web browsing battery life of the iPad. The following data represents the battery life, in hours

umka21 [38]

Answer:

12.5 hours

Step-by-step explanation:

The data which represents the battery life, in hours, experienced by six users is given below:

10 14 14 16 13 8

To determine the point estimate for the web browsing battery life of the iPad, we find the mean number of hours.

$Mean=\dfrac{10+14+14+16+13+8}{6} \\\\=\dfrac{75}{6} \\\\=12.5$

The point estimate for the web browsing battery life of the iPad is: 12.5 hours

8 0

3 years ago

Y+3=−4(x+7)<br> what is the slope>

Wewaii [24]

Answer:

......Im pretty sure its -4

7 0

3 years ago

Read 2 more answers

The length of a rectangle is two units more than its width, w. Which expression represents the area of the rectangle?

Ghella [55]

X^2+2x is the expression that represents the area.

3 0

4 years ago

Please help!!!!!!!!!

uranmaximum [27]

Is there any choices because i got 2 solutions

8 0

3 years ago

Jakob wants to invite 20 friends to his birthday, which will cost his parents $250. If he decides to invite 15 friends instead,

timofeeve [1]

Answer:

$187.50

Step-by-step explanation:

250/25= $12.50 per person

12.5 x 15= $187.50

4 0

3 years ago

Read 2 more answers