2 years ago

If DF = 170, find the value of x. Then find DE and EF. DE=3x + 20 EF=2x + 40

Mathematics

1 answer:

Julli [10]2 years ago

7 0

9514 1404 393

Answer:

DE = 86

EF = 84

Step-by-step explanation:

We assume that point E lies on segment DF, so that ...

DE + EF = DF

(3x +20) +(2x +40) = 170

5x = 110 . . . . . . . . . . . . . . . collect terms, subtract 60

x = 22 . . . . . . . . . . . . divide by 5

DE = 3×22 +20 = 66 +20 = 86

EF = 2×22 +40 = 44 +40 = 84

You might be interested in

SOMEONE PLEASE HELP ME! I promise i will mark brainlest, but i need the right answer for this. help is much appreciated <3.

Tresset [83]

Answer:

choice C

Step-by-step explanation:

the same input has 4 different outputs so its wrong

6 0

3 years ago

Solve for X I will mark brainliest

Marina86 [1]

ANSWER: x= 3/11

EXPLANATION:
5/6x-1/10x=2/15
= (25x-3x)/30=3/15 (FINDING COMMON DENOMINATORS)
= 22x/30=2/15
= 11x/15=2/15 (SIMPLIFYING THE NUMBERS)
= x=2/15*15/11 (MOVING THE NUMBERS) (11/15 will be 15/11 when it is moved to the other side)
= x=30/165
= x= 2/11 (SIMPLIFYING)

Hope it helps!

3 0

2 years ago

Read 2 more answers

What is 3 3/4*(-1 1/2)?

Artyom0805 [142]

Answer: $-\frac{45}{8}$ or $-5\ \frac{5}{8}$

Step-by-step explanation:

Rewrite each mixed numbers as fractions:

$3\ \frac{3}{4}=\frac{(4*3)+3}{4}=\frac{12+3}{4}=\frac{15}{4}\\\\1\ \frac{1}{2}=\frac{(2*1)+1}{2}=\frac{3}{2}$

Make the multiplication:

Multiply the numerator of the first fraction by the numerator of the second fraction and the denominator of the first fraction by the denominator of the second fraction.

$(\frac{15}{4})(-\frac{3}{2})=-\frac{45}{8}$ or $-5\ \frac{5}{8}$