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4 years ago

HHHEEELLPP I GIVE BRAINLIEST ANSWER!!!

2 answers:

3 0

$Just \ rearrange \ and \ solve: \\ \\ \frac{1}{4x} = 5 \ \ (*4x) \\ \\ 20x = 1 \ \ (/20)
\\ \\ x = 1/20$
With equations, you can add, subtract, multiply and/or divide by any amount so long as whatever you do is done to both sides of the equation;
Using this principle we can rearrange equations to give us the value of an unkown variable.

Contact [7]4 years ago

3 0

1/4x=5
1=20x
20x=1
Answer: x=1/20

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A pilot can fly an airplane 2240 miles with the wind in the same time as she can fly 1920 miles against the wind. If the speed o

Artist 52 [7]

Recall your d = rt, distance = rate * time

so... hmm if the plane has a still air speed of say "r", when it's going with the wind, is not really going "r" fast, is going "r + 40 ", because the wind is adding 40mph to its speed, is really moving.

and when the plane is going against the wind, is not really going "r" fast either, is going " r - 40 ", because the wind is eroding speed from it.

now, it went 2240 miles for say "t" hours, and it did 1920 miles for the same length of time, "t" hours.

$\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
\textit{with the wind}&2240&r+40&t\\
\textit{against the wind}&1920&r-40&t
\end{array}
\\\\\\
\begin{cases}
2240=(r+40)t\implies \frac{2240}{r+40}=\boxed{t}\\
1920=(r-40)t\\
----------\\
1920=(r-40)\left( \boxed{\frac{2240}{r+40}} \right)
\end{cases}
\\\\\\
1920=\cfrac{(r-40)2240}{r+40}\implies 1920(r+40)=(r-40)2240
\\\\\\
1920r+76800=2240r-89600\implies 166400=320r
\\\\\\
\cfrac{166400}{320}=r$

and surely you know how much that is.

6 0

3 years ago

P what equation in slope-intercept form represents the line that passes through the points (3,5) and (-9,2)

ivanzaharov [21]

Answer:

$y =\frac{1}{5}x+\frac{22}{5}$

Step-by-step explanation:

To write the equation of a line, use the slope formula to first find the slope.

$m=\frac{y_2-y_1}{x_2-x_1}=\frac{5-2}{3--9}=\frac{3}{3+12}=\frac{3}{15}=\frac{1}{5}$

Substitute m=1/5 and the point (3,5) into point slope formula.

$y-y_1 = m(x-x_1)\\y-5=\frac{1}{5}(x-3)\\y-5=\frac{1}{5}x -\frac{3}{5}\\y =\frac{1}{5}x+\frac{22}{5}$

3 0

3 years ago

Lexi wants to build a box that will have a volume of 60 cubic inches. What could the possible dimensions be? (chose multiple ple

Hitman42 [59]

Answer:

Step-by-step explanation:

tell me if im wrong

8 0

3 years ago

Read 2 more answers

Find P(5)-p(3) if P(2x)+P(4x)+P(6x)=24x-6

professor190 [17]

Answer:

P(5) - P(3) = 4

Step-by-step explanation:

<em>Lets explain how to solve the problem</em>

Assume that P(x) is a linear function, that because the sum of P(2x),

P(4x), and P(6x) is linear ⇒ (24x - 6 is linear)

∵ The form of the linear function is y = ax + b

∴ P(x) = ax + b

Substitute x by 2x

∵ P(2x) = a(2x) + b

∴ P(2x) = 2ax + b

Substitute x by 4x

∵ P(4x) = a(4x) + b

∴ P(4x) = 4ax + b

Substitute x by 6x

∵ P(6x) = a(6x) + b

∴ P(6x) = 6ax + b

Add the three functions

∴ P(2x) + P(4x) + P(6x) = 2ax + b + 4ax + b + 6ax + b

Add like terms

∴ P(2x) + P(4x) + P(6x) = 12ax + 3b ⇒ (1)

∵ P(2x) + P(4x) + P(6x) = 24x - 6 ⇒ (2)

Equate (1) and (2)

∴ 12ax + 3b = 24x - 6

By comparing the two sides

∴ 12a = 24 and 3b = -6

∵ 12a = 24

Divide both sides by 12

∴ a = 2

∵ 3b = -6

Divide both sides by 3

∴ b = -2

Substitute these values in P(x)

∵ P(x) = ax + b

∴ P(x) = 2x + (-2)

∴ P(x) = 2x - 2

Now we can find P(5) - P(3)

∵ P(5) = 2(5) - 2 = 10 - 2 = 8

∵ P(3) = 2(3) - 2 = 6 - 2 = 4

∴ P(5) - P(3) = 8 - 4 = 4

* P(5) - P(3) = 4

5 0

3 years ago

Please answer this correctly without making mistakes I want ace expert and genius people to answer this correctly without making

mart [117]

-4.9(-2)=9.8
9.8-9.2=0.6
the answer is 0.6

8 0

3 years ago

Read 2 more answers