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CaHeK987 [17]
2 years ago
10

Help please 3x-10=5679-y=2xwork out x and y​

Mathematics
2 answers:
ycow [4]2 years ago
8 0

3x-10=56

79-y=2x    so y=-2x+79

(Solve 3x−10=56 for x):

3x−10=56

3x−10+10=56+10 (Add 10 to both sides)

3x=66

(Divide both sides by 3)

x=22

(Substitute 22for x in y=−2x+79):

y=−2x+79

y=(−2)(22)+79

y=35 (Simplify both sides of the equation)

Answer:

x=22 and y=35

Lana71 [14]2 years ago
5 0

Answer:

3x-10=56

3x=56+10

3x=66

3x/3 = 66/3

x=11

79-y=2x

79-y=2(11)

79-y=22

79-22=y

y=57

therefore x=11 and y=57

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Answer:

See below

Step-by-step explanation:

<u>Given</u><u> </u><u>:</u><u>-</u><u> </u>

  • y || z

<u>To </u><u>Prove</u><u> </u><u>:</u><u>-</u><u> </u>

  • m∠5 + m∠2 + m∠6 = 180°

<u>Proof</u><u> </u><u>:</u><u>-</u><u> </u>

Here we are required to prove that ,

\rm\implies m\angle 5 + m\angle 6 + m\angle 2 = 180^o

And here it's given that , y || z . Therefore ,

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  2. ∠1 = ∠5 ( alternate interior angles )

Now we know that the measure of a straight line is 180°. Therefore ,

\rm\implies m\angle 1 + m\angle 2 + m\angle 3 = 180^o \\\\\implies\boxed{\rm  m\angle 5 + m\angle 6 + m\angle 2 = 180^o}

  • From 1 and 2 .

Hence Proved !

7 0
3 years ago
Simplify 4x((3x)3-9x+15)<br>​
Marianna [84]

Answer:

60x

Step-by-step explanation:

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3 years ago
Help me with part B and C appease!! No clowning around whoever help me, will get 30 points and I will brainliest you!!! &lt;3 pl
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Step-by-step explanation:

a.

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stepan [7]

He has enough memory space to download a song that will use 0.12 gigabytes of memory

The memory capacity of new cell phone = 1.5 gigabytes

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Substitute the values in the equation

Here we have to use the subtraction

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Subtract the terms

= 0.15 gigabytes

The size of the song = 0.12 gigabytes

We know 0.15 > 0.12

Hence, he has enough memory space to download a song that will use 0.12 gigabytes  of memory

The complete question is

Devin has a new cell phone that holds 1.5 gigabytes if memory for music. He has already used 1.35 gigabytes of the memory. Will he have enough space to download a song that will use 0.12 gigabyte of memory? Explain.

Learn more about subtraction here

brainly.com/question/2346316

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2 years ago
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enot [183]

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Step-by-step explanation:

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