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Anit [1.1K]
4 years ago
8

Please answer this and thank you If DE=4x+10, EF=2-1, and DF=9x-15, find DF.

Mathematics
1 answer:
professor190 [17]4 years ago
8 0
I hope that 2-1 means 21.

DE + EF = DF
4x + 10 + 21 = 9x - 15
4x + 31 = 9x - 15
31 = 9x - 4x - 15
31 = 5x - 15
46 = 5x
x = 9 1/5 = 9.2

You want 9x - 15
9*9.2 - 15
82.8 - 15
67.8 <<<<< answer. 
If I have given the wrong meaning to 2-1 (which could mean 1) leave another note and I will correct my work. 
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Dmitriy789 [7]
25/4
You can multiply by crossing
10/24 and x/15
10*15 = 24x
150/24=x
Divide the numerator and denominator by 6
25/4
25/4 is the answer
6 0
3 years ago
What is the reflection image of P (0, 0) after two reflections, first across x = −3 and then across y = −3? (−6, −6) (−6, −3) (−
Nadya [2.5K]

Answer:

(-3,-3)

Step-by-step explanation:

If we reflect P (0,0) across x=-3 and then across y=-3, then the new point of P would be (0-3,0-3)=(-3,-3)

4 0
4 years ago
Explain why the vertical line does not represent a linear function.
Rashid [163]

Answer:

Its my first answer but may i have a brainlist please im new

Step-by-step explanation:

5 0
3 years ago
Do the ratios 13/14 and 1/2 from a proportion
Gnoma [55]

Answer:

<em>No, I believe not</em>

Step-by-step explanation:

If these fractions were to form a proportion among one another, it would be that 13 / 14 should simplify to 1 / 2, but;

13 / 14 ( simplified ) ⇒ 13 / 14

Now there is another way to check if these fractions do form a proportion, by forming the proportion itself, applying cross multiplication to identify if either side is equivalent to one another;

13 / 14 = 1 / 2,

13 * 2 = 14 * 1,

26 ≠ 14,

<em>Answer; Thus these ratios really don't form a proportion among one another</em>

7 0
4 years ago
-6(1 - 5v) = 54<br>-67301 = 54<br>I don't think that is the anwer​
tatiyna
V=2
First you need to divide both sides by -6
Then move the 1 subtracting
Then divide both sides by -5

7 0
3 years ago
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