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3 years ago

Y=2x+13x4y=26 how to solve

Mathematics

1 answer:

Kay [80]3 years ago

8 0

Answer:

y=6.5

x= 6.5/15

Step-by-step explanation:

y=2x+13x

4y=26 26/4= 6.5

so 6.5 = 15x 6.5/15=x

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What is the contra positive of the statement if 9x=27, then x=3

Karo-lina-s [1.5K]

Answer:

If 9x is not =27, then x is not =3

Step-by-step explanation:

Going out on a limb here, please ignore if I'm missing it:

If 9x is not =27, then x is not =3

(I can't type the equal sign with a slash through it.)

7 0

3 years ago

What is the answer to this question?¿

anastassius [24]

Working backwards:

17-3=14
14/2=7

7 is the second term in the sequence. Continue backwards.

7-3=4
4/2=2

2 is the first term in the sequence, aka your answer.

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3 years ago

Passing through (-2,1 ) and perpendicular to 4x + 7y + 3 = 0.

Lunna [17]

Answer:

Step-by-step explanation:

The slope-intercept form of an equation of a line:

$y=mx+b$

m - slope

b - y-intercept

========================================

Let

$k:y=m_1x+b_1\\\\l:y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\l\ \parallel\ k\iff m_1=m_2$

========================================

We have the equation of a line in a general form (Ax + By + C = 0)

Convert it to the slope-intercept form:

$4x+7y+3=0$ subtract 7y from both sides

$4x+3=-7y$ divide both sides by (-7)

$-\dfrac{4}{7}x-\dfrac{3}{7}=y\to m_1=-\dfrac{4}{7}$

Therefore

$m_2=-\dfrac{1}{-\frac{4}{7}}=\dfrac{7}{4}$

We have the equation:

$y=\dfrac{7}{4}x+b$

Put the coordinates of the point (-2, 1) to the equation, and solve for b :

$1=\dfrac{7}{4}(-2)+b$

$1=-\dfrac{7}{2}+b$ multiply both sides by 2

$2=-7+2b$ add 7 to both sides

$9=2b$ divide both sides by 2

[te]x\dfrac{9}{2}=b\to b=\dfrac{9}{2}[/tex]

Finally:

$y=\dfrac{7}{4}x+\dfrac{9}{2}$ - slope-intercept form

Convert to the general form:

$y=\dfrac{7}{4}x+\dfrac{9}{2}$ multiply both sides by 4

$4y=7x+18$ subtract 4y from both sides

$0=7x-4y+18$

6 0

3 years ago

Jared surf for one third of the nine hours he was at the beach he spent the rest of the time building a sandcastle how many hour

WINSTONCH [101]

9 dived by 3 = 3
so he surfed for 3 hours = 1/3 of 9
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so he spent 6 hours building a sandcastle

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3 years ago

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Which of the following questions describes the equation = a/4 -20?

Gekata [30.6K]

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3 years ago