The table shows the battery life of four different mobile phones.


Mobile Phone Battery Life
Phone Battery Life
A 20
B 25
C 10
D 18


If 7.75% of the battery life of each mobile phone is used in a day by a typical user, for which mobile phone is 0.775 hour of battery life used in a day?
Phone A
Phone B
Phone C
Phone D

Answer:

8x

Step-by-step explanation:

8= the times multiply and "x" being the # being multiply

Answer:

8x - y

Step-by-step explanation:

8 times a number (x) is 8 times x = 8x

decreasing by y means take away y...  but u should know that right?

lol hope this helps :)

brainliest?

Answer:

Step-by-step explanation:

Total outcome is

3 + 6 + 8 + 11 + 14 + 16 + 15 + 12 + 9 + 5 + 1 = 100

Favorable outcome is

3 + 6 + 11 + 16 + 5 = 41

The percent probability is

41 / 100 = 41 %

Answer:

7) nth term a₁₈ is 160

8) nth term a₃₆ is 128

Step-by-step explanation:

7) Find nth term of each arithmetic sequence

[tex]a_1=7, d=9, n=18[/tex]

The formula used to find nth term is: [tex]a_n=a_1+(n-1)d[/tex]

Putting values and finding nth term n=18

[tex]a_n=a_1+(n-1)d\\a_{18}=7+(18-1)9\\a_{18}=7+(17)9\\a_{18}=7+153\\a_{18}=160[/tex]

So, nth term n₁₈ is 160

8) Find nth term of each arithmetic sequence

[tex]a_1=-12, d=4, n=36[/tex]

The formula used to find nth term is: [tex]a_n=a_1+(n-1)d[/tex]

Putting values and finding nth term n=36

[tex]a_n=a_1+(n-1)d\\a_{36}=-12+(36-1)4\\a_{36}=-12+(35)4\\a_{36}=-12+140\\a_{36}=128[/tex]

So, nth term n₃₆ is 128

Answer: Its C

Step-by-step explanation:

Well, this irrational, or never-ending, ratio starting with 1.618 has been given many names over the years including the “golden ratio” and the “divine proportion”.

0verall what im trying to say is, its c

Answer:

A

Step-by-step explanation:

First expand the 3 and get 7x + 3x - 6 - 4x + 8

All them altogether

7x + 3x = 10x - 4x = 6x

-6 + 8 = 2

Plug in the equation and we get 6x + 2

Answer:

It would be J

Step-by-step explanation:

Answer:

2

queen Other 3 xsl on 5 the 12 is under that making it a simplist form which would be b

The ratio of lemonade and sparkling water is 1:3.

Ratio basically compares quantities, that means it shows the value of one quantity with respect to the other quantity.

If a and b are two values, their ratio will be a:b,

Given that,

Number of tablespoons of lemonade = 4,

And number of cups of sparkling water = 12.

To find tablespoons of lemonade pr cup of sparkling water,

Use ratio property,

= 4:12

=1:3

Therefore, 1 tablespoon of lemonade takes 3 cups of sparkling water.

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Answer:

study it

Step-by-step explanation:

study it

Answer:

dy/dx = -0.5285

Step-by-step explanation:

e^(xy) − y² = e^(−4)

To get dy/dx, we will differentiate with respect to x applying both chain rule and product rule.

Thus;

e^(xy)[d(xy)/dx] - (d/dx)y² = 0

e^(xy)[x(dy/dx) + y] - ((dy/dx) × (d(y²)/dy)) = 0

xe^(xy)[dy/dx] + ye^(xy) - 2y = 0

Thus, rearranging we have;

dy/dx = [2y -(ye^(xy))]/xe^(xy)

We are given;

x = 1/2 and y = 2

Thus;

dy/dx = [2(2) - (2e^(½ × 2))]/(1e^(½ × 2))

dy/dx = (4 - 5.4366)/2.7183

dy/dx = -0.5285

Answer: 12.25 dollars

Step-by-step explanation:

Answer:

it should be 9

Step-by-step explanation:

i already did this

Answer:

54266.25

Step-by-step explanation:

Answer:

it's B

Step-by-step explanation:

lol how do you not know this

Answer:

B

Step-by-step explanation:

Answer:

a) $3000

b) $1500

Step-by-step explanation:

a)

interest = Principal x rate as decimal x time

interest = 15,000 x 0.05 x 4

interest = 3000

b)

interest = Principal x rate as decimal x time

interest = 15,000 x 0.05 x 2

interest = 1500

you save $1500 if you pay after 2 years

Answer:

The question is not clear

Answer:

x= -8

y= -17

Step-by-step explanation:

Answer:

If you trying to find x and y is the answer is:

x=-8 and y=-17

or

(-8,-17)

Step-by-step explanation:

First you need to subtract the two equations which becomes 2x+16=0

Now you move the 16 to the other side by subtracting 16 on both sides:

2x=-16

Now divide 2 on both sides to eliminate the 2 on 2x

x=-8

Now that you got -8 as x you can replace x on the two equations any one of them you only need to get one but I am going to use both of them to show you that it is the same:

y= 3(-8)+7

y=-17

y=-8-9

y=-17

Hope this helps!

Answer:

10(2w+7)

Step-by-step explanation:

Answer:

6(x+3y-9)

Step-by-step explanation:

GCF is 6

Answer:

Step-by-step explanation:

6x+18y-54=

6 is the GCF

6(x+3y-9)

Answer:

1

Step-by-step explanation:

Answer:

y = 4/3 + 4

Step-by-step explanation:

4/3 comes from using rise over run. 4 comes from the y-intercept.

Answer:

y = [tex]\frac{4}{3}[/tex] x + 4

Step-by-step explanation:

y = mx + b

m = [tex]\frac{rise}{run}[/tex] ; "b" is y-intercept

~~~~~~~~~~~

m = [tex]\frac{4}{3}[/tex] and b = 4

y = [tex]\frac{4}{3}[/tex] x + 4

Step-by-step explanation:

55-30 = 25

25 out of 55 chose the soup.

Hope that helps

Answer:

30:55

Step-by-step explanation:

30 out of the 55 students that bought lunch, bought sandwiches. So, 30 sandwiches to 55 students. It's a trick question that gives you all the information in the question itself, so it's fairly simple. I hope I'm right tho lol

Answer:

i. Angela is wrong. Because the diameter of the wheel is not the distance covered all the way round.

ii. The time is 3.14 seconds.

Step-by-step explanation:

The font wheel has a diameter of 10 inches. Thus;

radius = [tex]\frac{diameter}{2}[/tex]

           = [tex]\frac{10}{2}[/tex]

           = 5 inches

Circumference of a circle = 2[tex]\pi[/tex]r

⇒ The circumference of the front wheel = 2[tex]\pi[/tex]r

                          = 2 x [tex]\frac{22}{7}[/tex] x 5

                          = 31.4286

The circumference of the front wheel is 31.43 inches.

The total distance to be covered by the mantis = circumference of the front wheel

                                        = 31.43 inches

But,

speed = [tex]\frac{distance}{time}[/tex]

The scooter moves with a speed of 10 inches per second, so that;

10 = [tex]\frac{31.43}{time}[/tex]

⇒ time = [tex]\frac{31.43}{10}[/tex]

            = 3.143 s

The time taken to complete a revolution by the mantis is 3.14 seconds.

Therefore,

i. Angela is wrong. Because the diameter of the wheel is not the distance covered all the way round.

ii. The time is 3.14 seconds.

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[tex]p - \frac{19}{6} = - \frac{15}{6} \\ [/tex]

Add sides 19 / 6

[tex]p - \frac{19}{6} + \frac{19}{6} = - \frac{15}{6} + \frac{19}{6} \\ [/tex]

[tex]p = \frac{19 - 15}{6} \\ [/tex]

[tex]p = \frac{4}{6} \\ [/tex]

[tex]p = \frac{2 \times 2}{2 \times 3} \\ [/tex]

[tex]p = \frac{2}{3} \\ [/tex]

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Answer:

What is the value of x in the product of powers 55 · 5x = 52 ?

x = –3

What is the value of y in the product of p-3 · p-6 = py

y = –9

What is the value of n in th product of 92 · 9-7 · 9n  =  9-5 = [tex]\frac{1}{9^5} }[/tex]

n = 0

Hope this helps :D

The value of x in the product of powers is -3, the value of y is -9 and the value of n is 0.

Exponents are the method of writing numbers, especially large numbers, in terms of a base and an exponent, which is written as the power of base.

Given that,

5⁵ . 5ˣ = 5²

We have to use a multiplication rule for exponent here.

xᵃ . xᵇ = xᵃ⁺ᵇ

Using this,

5⁵⁺ˣ = 5²

⇒ 5 + x = 2

⇒ x = -3

p⁻³ . p⁻⁶ = p^y

Using the same rule of exponent,

p⁻³⁺⁻⁶ = p^y

⇒ y = -3 - 6 = -9

9² . 9⁻⁷ . 9ⁿ = 9⁻⁵

9²⁻⁷⁺ⁿ = 9⁻⁵

⇒ 2 - 7 + n = -5

⇒ n = 0

Hence the values of x, y and n are -3, -9 and 0 respectively.

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