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3 years ago

I really need this answer

Mathematics

2 answers:

yuradex [85]3 years ago

8 0

Answer:

A) -2 1/2 x

Step-by-step explanation:

= -6(3/12 x - 8/12 x + 10/12 x)

= -6(5/12 x)

= - 5/2 x

= - 2 1/2 x

HACTEHA [7]3 years ago

4 0

Answer:

A is the answer.

Step-by-step explanation:

What you do is you multiply -6 into each of the fractions and then add or minus the fractions together.

-6(1/4x)=-3/2x

-6(-2/3x)=4x

-6(5/6x)=-5x

-3/4x+4x-5x=-2.5 or A.

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Lyrx [107]

The correct answer for this question is this one: "y = -x + 2"

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y = mx + b
2 = -1 (0) + b
b = 2

so the equation of the line is
y = -x + 2
Hope this helps answer your question and have a nice day ahead.

6 0

3 years ago

Let $P$ and $Q$ be constants. The graphs of the lines $x + 5y = 7$ and $15x + Py = Q$ are perpendicular and intersect at the poi

Marta_Voda [28]

Answer:

(-3, -129)

Step-by-step explanation:

Given

Two lines:

$x + 5y = 7$

$15x + Py = Q$

are perpendicular to each other and intersect at point (-8,3).

To find: (P, Q)

Solution:

The two lines intersect at (-8,3).

It means, the equation of line will be satisfied when we put value of x = -8 and y = 3

Putting in the second equation, we will get an equation in P and Q:

$15\times (-8) + P \times 3 = Q\\\Rightarrow 3P = Q +120 ..... (1)$

Given that two lines are perpendicular.

It means the product of their slopes will be equal to -1.

i.e. $m_1\times m_2=-1$

Slope of a line of the form $ax+by+c=0$ is given as:

$m=-\dfrac{a}{b}$

So, slopes of given lines are:

$m_1=-\dfrac{1}{5}\\m_2=-\dfrac{15}{P}$

Using the condition:

$-\dfrac{1}{5}\times \dfrac{-15}{P}=-1\\\Rightarrow P = -3$

Putting the value of P in equation (1):

$\Rightarrow 3\times (-3) = Q +120 \\\Rightarrow Q = -9-120 = -129$

So, answer is (-3, -129)

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3 years ago

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Margaret [11]

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Step-by-step explanation:

Assuming the measurements of the sides are already in inches, say the area of the base ends up being 14in and the height of the prism is 5in, multiply those numbers and your answer would be 70 inches cubed.

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3 years ago

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kondor19780726 [428]

The answer would be -17 because i know

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3 years ago

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Sergio [31]

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Step-by-step explanation:

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3 years ago

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