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3 years ago

15x+5y=30 with y by itself

Mathematics

2 answers:

SCORPION-xisa [38]3 years ago

3 0

Answer:

15 x 1 + 5 x 3 = 30

Step-by-step explanation:

If you turn the x into a one then it multiplies 15 by one and then it remains at 15, then you multiply 5 and 3 so that's 15 and then 15 + 15 is 30.

12345 [234]3 years ago

3 0

Answer:y=6-3x

Step-by-step explanation:

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8 0

2 years ago

Factor the quadratic by checking factor pairs. 6x2 + 7x + 1 6x2 + 7x + 1 =

Sati [7]

Answer:

U cannot use factorisation method to solve this, we are to use formula method

Step-by-step explanation:

6x²+7x=1

6 0

3 years ago

Which of the following expressions are polynomials?

AlekseyPX

Answer:

1,3 and 5

Step-by-step explanation:

1) -2(7x + 1) − 5(3x2 + 3x + 2)

= -14x - 2 - 15x^2 - 15x - 10

= -15x^2 - 29x - 12

2) (5x2 − 10x + 8) − (10x2 + 19x + 20)

= 5x^2 - 10x + 8 - 10x^2 - 19x - 20

= -5x^2 -29x - 12

3) (-7x2 − 21x + 13) − (8x2 + 8x + 25)

= -7x^2 - 21x + 13 - 8x^2 - 8x - 25

= -15x^2 - 29x - 12

4) (-19x2 − 4x - 7) + (4x2 + 25x − 5)

= -15x^2 + 21x - 12

5) (-17x2 + 2x − 3) + (2x2 − 31x − 9)

= -15x^2 -29x - 12

6) -2(4x − 15) − 3(5x2 + 7x + 6)

= -8x + 30 - 15x^2 - 21x - 18

= -15x^2 - 29x + 12

5 0

3 years ago

Find thr valuse of x, rounded to the nearest tenth. 3.8 4 2.7 2.9

irina1246 [14]

Answer: 4 (OPTION 2)

Step-by-step explanation:

1. To solve this problem you must apply the Intersecting secants theorem, as you can see below:

$(A+B)B=(C+D)D$

Where:

$(A+B)=6$

$B=x\\(C+D)=8\\D=2$

2. Then you must susbstitute values and solve for x, as following:

$6x=24\\x=24/6\\x=4$

Therefore the answer is the second option.

3 0

2 years ago

Read 2 more answers

Is 2(3a-2)+4a equivalent to 10a-2

Nezavi [6.7K]

No it’s equal to 10a-4

5 0

3 years ago

15x+5y=30 with y by itself​

15x+5y=30 with y by itself