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EastWind [94]
3 years ago
10

Solve the question below, please

Mathematics
1 answer:
zhuklara [117]3 years ago
3 0

Answer:

Step-by-step explanation:

(x-3)/(x+4) = x/(x+10)

(x-3)(x+10) = x(x+4)

x²+7x-30 = x²+4x

3x = 30

x = 10

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Write and equati9n of a l8ne that passes through (1,-2) and is perpendicular to -4x+7y=21
yarga [219]

Given:

A line passes through (1,-2) and is perpendicular to -4x+7y=21.

To find:

The equation of that line.

Solution:

We have, equation of perpendicular line.

-4x+7y=21

Slope of this line is

m_1=-\dfrac{\text{Coefficient of x}}{\text{Coefficient of y}}

m_1=-\dfrac{-4}{7}

m_1=\dfrac{4}{7}

Product of slope of two perpendicular lines is -1.

m_1\times m_2=-1

\dfrac{4}{7}\times m_2=-1

m_2=-\dfrac{7}{4}

Now, slope of required line is -\dfrac{7}{4} and it passes through (1,-2). So, the equation of line is

y-y_1=m(x-x_1)

where, m is slope.

y-(-2)=-\dfrac{7}{4}(x-1)

4(y+2)=-7(x-1)

4y+8=-7x+7

4y+7x=7-8

7x+4y=-1

Therefore, the equation of required line is 7x+4y=-1.

7 0
3 years ago
What is the domain and range​
kogti [31]

Answer:

The domain is all the x-values, and the range is all the y-values

Step-by-step explanation:

7 0
3 years ago
Factor each expression 30+10x-40y
Sergio039 [100]
Hello!

To factor you find the biggest number they can be divided by

The biggest number that all the number can be divided by is 10

You put that outside parenthesis

10()

Divide the expression by 10

3 + x - 4y

Put the two together

10(3 + x + 4y)

Hope this helps!
4 0
3 years ago
What three prima donna numbers can be added to equal 40?
Vlada [557]
I think the answer is 10, 20, and 4
5 0
3 years ago
Need help asap! will give the first right answer brainliest!
stiv31 [10]

Answer:

Step-by-step explanation:

12

4 0
3 years ago
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