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2 years ago

I need help with solving it

Mathematics

2 answers:

slega [8]2 years ago

7 0

Sorry I can't lol but hope someone else can

Elina [12.6K]2 years ago

5 0

parallel lines have the same exact slopes, thefore "q" must also have the same slope as "p", wait a second, what's p's slope anyway? let's see the equation, low and behold, the equation is already in point-slope form, therefore,

$\bf \begin{array}{|c|ll}
\cline{1-1}
\textit{point-slope form}\\
\cline{1-1}
\\
y-y_1=m(x-x_1)
\\\\
\cline{1-1}
\end{array}~\hspace{10em}y+2=\stackrel{\stackrel{slope}{\downarrow }}{\cfrac{-9}{7}}(x-3)$

so we're really looking for the equation of a line whose slope is -9/7 and runs through (2, -4).

$\bf (\stackrel{x_1}{2}~,~\stackrel{y_1}{-4})~\hspace{10em}
slope = m\implies \cfrac{-9}{7}
\\\\\\
\begin{array}{|c|ll}
\cline{1-1}
\textit{point-slope form}\\
\cline{1-1}
\\
y-y_1=m(x-x_1)
\\\\
\cline{1-1}
\end{array}\implies y-(-4)=-\cfrac{9}{7}(x-2)
\implies y+4=-\cfrac{9}{7}x+\cfrac{18}{7}
\\\\\\
y=-\cfrac{9}{7}x+\cfrac{18}{7}-4\implies y=-\cfrac{9}{7}x-\cfrac{10}{7}\impliedby \textit{slope-intercept form}$

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Days/ cost to rent a truck 1/34 2/50 3/66 4/82 A/ C=16d B/ C= 16d + 18 C/ C= 16d + 16 D/ C=18d + 16

Mamont248 [21]

Use the given information as (x, y) points.
You have
(1, 34)
(2, 50)
(3, 66)
(4, 82)
The difference between renting for 1 day and 2 days is 50 - 34 = 16.
The difference between renting for 2 days and 3 days is 66 - 50 = 16
The difference between renting for 3 days and 4 days is 82 - 66 = 16
For each day you rent you pay $16.
Now look at renting for 1 day.
The rental for 1 day is $16, but for 1 day you pay $34.
$34 - $16 = $18
There is an extra $18 in the rental for every day. The $18 is fixed.
That means, to rent a truck, you must pay a fixed amount of $18 plus $16 per day.

total cost = daily cost + fixed cost
total cost = 16d + 16
c = 16d + 18

3 0

2 years ago

Read 2 more answers

Use distributive property to write an expression that is equivalent to each expression. -8(-x-3/4y+7/2

Lesechka [4]

Answer:

8x +6y -28

Step-by-step explanation:

The outside factor applies to each inside term, so the equivalent expression is ...

-8(-x -3/4y +7/2) = 8x +6y -28

Applying the distributive property once again, we can also write the equivalent expression ...

= 2(4x +3y -14)

There are an infinite number of other equivalent expressions. The problem statement is non-specific as to the acceptable form.

4 0

3 years ago

Describe and correct the error a student made in finding the midpoint cd with c(-4,5) and d(-1,-4).

Gnesinka [82]

Answer:

Step-by-step explanation:

The formula for finding the midpoint of two coordinates is expressed as;

M(X,Y) = $(\frac{x_1+x_2}{2} , \frac{y_1+y_2}{2})$

Given the coordinates c(-4,5) and d(-1,-4), x1 = -4, y1 = 5, x2 = -1 and y2 = -4.

For the X coordinate of the midpoint

X = x1+x2/2

X = -4+(-1)/2

X = -4-1/2

X = -5/2

X = -2.5

Similarly for Y:

Y = y1+y2/2

Y = 5+(-4)/2

Y = 5-4/2

Y = 1/2

Y = 0.5

Hence the midpoint coordinate of C(-4,5) and D (-1,-4) is (-2.5, 0.5)

5 0

3 years ago

The temperature in several cities in Canada are shown in the table to the right. The average temperature can be found in the sum

aliina [53]

Answer:

The one you selected is right

Step-by-step explanation:

8 0

3 years ago

2. There are 42 persons in a mathematics class, and everyone of them drinks either coffee or grape milk at

Basile [38]

Answer:

1. 8

2. 24

Step-by-step explanation:

The number of persons that drink grape milk only :

18 - 10 = 8

The number of persons that drink coffee :

42 - 8 = 34

The number of persons that drink coffee only :

34 - 10 = 24

5 0

2 years ago