What is 155% of 50(please help)

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

3 years ago

Read 2 more answers

John's current salary is 40000 per year.His annual pay raise is always a percent of his salary.What would his salary be if he re

ad-work [718]

Answer:

The salary after four consecutive increase = $ 46794.34

Step-by-step explanation:

According to question,

salary of MR. John = $ 40000 per year

percentage py increase = 4%

Let the salary after four consecutive pay increase = x

So, X = 40000 (1 + $\frac{4}{100}$ )^4

Or, X = 40000 ( $\frac{26}{25}$ )^4

Or, X = 46794.34

Hence the salary increase after four consecutive pay increase at 4% = $46794.34 Answer

3 0

3 years ago

Subtract 3x^2+8x3x 2 +8x from -9x^2+3x-8−9x 2 +3x−8

r-ruslan [8.4K]

Answer:

oogla boogla

Step-by-step explanation:

5 0

3 years ago

Five college students' scores on a test are 25, 25, 30, 35, and 40. what is the mean for this set of scores?

klio [65]

Answer:

Mean= 31

Step-by-step explanation:

To find the mean you need to add all the number together and then divide by how many ever numbers there are.

In this case

25 + 25 + 30 + 35 + 40=155

There are 5 numbers so you would divide by 5

155/5

=31

5 0

1 year ago

What's the circumference of a circle with a diameter of 3 inches? Use 3.14 for pi

DedPeter [7]

Answer:

C≈18.85

Step-by-step explanation:

3 0

2 years ago