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Solnce55 [7]
3 years ago
9

Will MARK YOU!!!HELP!!! DUE IN 5MINS...

Mathematics
2 answers:
Law Incorporation [45]3 years ago
8 0
I’m not completely sure, but the correct answer should be 0!
Vesna [10]3 years ago
7 0

Answer:

0

Step-by-step explanation:

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5x + 7y = 25<br> 5x - 2y = -65<br> solve using elimination<br> (step by step please)
aliina [53]

5x+7y=25

5x-2y=-65

subtract both of the equations

5x-5x=0

7y--2y= 7y+2y=9y

25--65=25+65=90

0+9y=90

9y=90

divide both sides by 9 to get y by itself

9y/9=90/9

cross out 9 and 9 which becomes 1*1*y=y

90/9=10

y=10

find x by using the substitution method

5x+7y=25

5x+7(10)=25

5x+70=25

move +70 to the other side

sign changes from +70 to -70

5x+70-70=25-70

5x=-45

divide both sides by 5 to get x by itself

5x/5=-45/5

cross out 5 and 5 then becomes 1*1*x=x

-45/5=-9

x=-9

answer:

(-9,10)

6 0
3 years ago
Can someone please help me out
ira [324]

BD \: is \: the \: bisector \: of \: \widehat{ABC} \Rightarrow \widehat{ABD}=\widehat{CBD}  \\\Rightarrow \widehat{ABC} = \widehat{ABD} + \widehat{CBD} = 2\widehat{ABD} = 2 \times 39 = 78° \\ \Rightarrow D. \: 78°

4 0
3 years ago
Read 2 more answers
Factor 9x 6 – 16y 6 completely.
il63 [147K]
Please use the symbol " ^ " to denote exponentiation:  9x^6 = (___)^2.

Note that 9x^6 = 3^2*(x^3)^2.  Thus,

9x^6 = (___)^2 becomes (3x^3)^2.

Then    <span>9x^6 – 16y^6 = (3x^3)^2 - (4y^3)^2 = ((3x^3) - (4y^3))[(3x^3) +(4y^3)]</span>
5 0
3 years ago
What is the domain of the function f(w) = 0.5(35 – 2w)? Explain your answer.
Igoryamba
The domain is all real numbers, the function is a variant of linear, which could be expressed in the form of y=mx+b as y = -w + 17.5, therefore all real numbers is the domain and the range.
5 0
3 years ago
If a= 5, b= 8, and c= ½<br><br> 6a - 2b + bc
Rainbow [258]

Answer:

18

Step-by-step explanation:

6x5=30

2x8=16

8x1/2=4

30-16=14

14+4=18

8 0
3 years ago
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