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Sholpan [36]
3 years ago
7

I think of a number, double it and add 14. The result is 36. What is the number?

Mathematics
2 answers:
never [62]3 years ago
4 0

Answer:

11

Step-by-step explanation:

11*2=22, 22+14=36, quick maths

Margarita [4]3 years ago
4 0

Answer:

11

Step-by-step explanation:

36-14 gives you the doubled-number you chose, 22.

Then since the number is doubled, divide it by 2. 22÷2=11

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What is the y-intercept of the line y = 20x?
OlgaM077 [116]

Answer:

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Step-by-step Explanation

y = 20x \\  \\ y = 20x + 0 \\  \\ equating \: it \: with \\ y = mx + b \\  \\ b = 0 \\  \\ y - intercept \:  = 0

7 0
3 years ago
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The graph was made to compare the costs of taking two different taxis. What does the intersection mean for the two lines?
Bingel [31]

Answer: The total price of $8 is the same for both taxi cabs for 3 miles.

Step-by-step explanation: if you look at the graph you can see the dot on 8(which is the total cost) and the number of miles is 3

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3 years ago
Tiffany took her friends out to dinner. If the dinner was $29.53 and she gave a 20% tip, how much money did she spend on dinner?
gladu [14]

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7 0
2 years ago
una ventana rectangular tiene l metros de ancho y h metros de altura, con un perímetro de 6 metros y un área de 2m² ¿cuál es la
seropon [69]

Answer:

The formula for calculating the width of the window is

w=\frac{-(-3)(+/-)\sqrt{-3^{2}-4(1)(2)}} {2(1)}

Step-by-step explanation:

<u><em>The question in English is</em></u>

A rectangular window is l meters wide and h meters high, with a perimeter of 6 meters and an area of 2m². What is the formula for calculating the width of the window?

we know that

The perimeter of the window is equal to

P=2(l+w)

we have

P=6\ m

so

6=2(l+w)

simplify

3=(l+w)

isolate the variable l

l=3-w ----> equation A

The area of the window is equal to

A=lw

we have

A=2\ m^2

so

2=lw ----> equation B

substitute equation A in equation B

2=(3-w)w

solve for w

2=3w-w^2

w^2-3w+2=0

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

w^2-3w+2=0

so

a=1\\b=-3\\c=2

substitute in the formula

w=\frac{-(-3)(+/-)\sqrt{-3^{2}-4(1)(2)}} {2(1)}  --->  formula for calculating the width of the window

w=\frac{3(+/-)\sqrt{1}} {2}

w=\frac{3(+/-)1} {2}

w=\frac{3(+)1} {2}=2\ m

w=\frac{3(-)1} {2}=1\ m

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Im guessing 3 i really dont know.. i dont understand what it means by 4 channels.
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