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sp2606 [1]
3 years ago
6

Can someone help me with 9, 10, & 11

Mathematics
1 answer:
Katarina [22]3 years ago
7 0

Answer:

1) For, m =  3/4 ,  (0,4)  , 4y - 16 - 3x = 0  is the equation of line.

2) For, m =  4 ,  (-2,-5)  , y -  4x - 4  = 0  is the equation of line.

3) For, m =  -1/3 ,  (4,-1)  , x + 3y -1  = 0  is the equation of line.

Step-by-step explanation:

If m is the slope and (x0,y0) is the point on any given equation, then

by POINT SLOPE FORMULA:

The line equation is given as (y - y0) = m (x -x0)

Now , here:

<u>1) m =  3/4 , (x0, y0) = (0.4)</u>

So,, the equation of line is (y-4) = \frac{3}{4} (x-0)\\or, 4(y-4)  =  3x

on simplification,  4y - 16 - 3x = 0  is the equation of line.

<u>2)</u><u> m =  4 , (x0, y0) = (-2.-5)</u>

So,, the equation of line is (y-(-5)) = 4 \times (x-(-2))\\or, (y+4)  =  4(x+2)

on simplification, y -  4x - 4  = 0  is the equation of line.

<u>3) m =  -1/3 , (x0, y0) = (4, -1)</u>

So,, the equation of line is (y-(-1)) = \frac{-1}{3} (x-4)\\or, 3(y+1)  =  -(x-4)

on simplification,   x + 3y -1  = 0  is the equation of line.

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Two sides of a triangle are 6 m and 7 m. The perimeter of the triangle is 23 m. What's the third side?
mixer [17]
23-6=17
17-7=10
The third side is 10m
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3 years ago
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The volume of a cylindrical soap dispenser is modeled by the expression below.select the true statement.a. the expression (x + 1
bulgar [2K]

Answer:

The expression (x+1)^2 represents the radius of the soap dispenser.

The expression 4x+1 represents the height of the soap dispenser.

Step-by-step explanation:

The question says that the soap dispenser is in the form of a cylinder.

Now, we find the volume of the cylinder by using the given formula:

V= \pi r^2 h, where V represents the volume, 'r' represents the radius, and 'h' represents the height of the cylinder.

Now, the volume is the product of radius squared and the height, if they both are functions of x, then the function to represent the volume must have cubic exponents.

Since, the radius is squared in the formula and it is a function of x that implies that the function of radius must have square as the exponent of x, therefore, the expression (x+1)^2 will represent the radius of the soap dispenser and the expression (4x+1) represents the height of the soap dispenser.

8 0
3 years ago
Read 2 more answers
3) Julian's shadow is 6 feet long. At the same time a 31 foot tall building casts a shadow that is 28 feet long. What proportion
SCORPION-xisa [38]

You are given the height of the building and the length of the shadow the building gives, so you can set that up as a proportion of Height of building over the length of the shadow so 31/28.

Now you can set the same proportion for Julian, using X for her height, so you would have x/6.


To solve for her height, set the two proportions equal and solve for x:

31/28 = x/6

Cross multiply:


31 * 6 = 28 *x

186 = 28x

Divide both sides by 28:

x = 186 / 28

x = 6.64 feet tall

5 0
3 years ago
I need the answer to this question? thxs
goblinko [34]

Answer:

RS = 19

Step-by-step explanation:

Given a segment joining the midpoints of 2 sides of a triangle then it is half the length of the third side, that is

- 5x + 44 = \frac{1}{2} (18 + 4x) ( multiply both sides by 2 to clear the fraction )

- 10x + 88 = 18 + 4x ( add 10x to both sides )

88 = 18 + 14x ( subtract 18 from both sides )

70 = 14x ( divide both sides by 14 )

5 = x

Then

RS = - 5x + 44 = - 5(5) + 44 = - 25 + 44 = 19

7 0
2 years ago
Use the number line to represent. -4 1/2 + 3 1/4. what is the sum?
dlinn [17]

Answer:

\displaystyle A+B=-\frac{5}{4}

Step-by-step explanation:

<u>The Number Line</u>

Let's call

\displaystyle A=-4\frac{1}{2}

\displaystyle B=+3\frac{1}{4}

Both numbers are given as mixed fractions. Let's convert them to improper fractions:

\displaystyle A=-4\frac{1}{2}=-(4+\frac{1}{2})=-\frac{8+1}{2}=-\frac{9}{2}

\displaystyle B=3\frac{1}{4}=3+\frac{1}{4}=\frac{12+1}{4}=\frac{13}{4}

The decimal values are A = -9/2=-4.5, B=13/4 = 3.25

Now represent the points in the number line. See the image below

Finally, calculate their sum:

\displaystyle A+B=-\frac{9}{2}+\frac{13}{4}

\displaystyle A+B=-\frac{18}{4}+\frac{13}{4}=\frac{-18+13}{4}

\boxed{\displaystyle A+B=-\frac{5}{4}}

4 0
2 years ago
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