why is school so hard:/

The total amount of money is 65x + 10 cents.

Given the following coins value

x dimes, (x+2) nickels, and 2x quarters

If value of a dime is 10 cents, nickel is 5 cents, and a quarter is 25 cent, the the total coin is cent is expressed as 10x + 5(x + 2) + 25(2x)

Total in cents. = 10x + 5(x + 2) + 25(2x)

Total in cents = 10x + 5x + 10 + 50x

Simplify

Total in cents = 65x + 10

Hence the total amount of money is 65x + 10 cents.

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Answer:

6.) So 8 of 24 hours is 1/3. So the percent of his time used was 33.33333 . . % (etc)

7.) The easiest way to figure out a percentage is dividing it. So if it was 30 hit out of 75 people, then divide 30 by 75. So 40% of them got hit.

Hope that helps

Answer:

1440 hrs

Step-by-step explanation:

5 is the number of hours he works, and 45 is the total money David makes.

Two or more expressions with an Equal sign is called as Equation.

Given that David  offers his clients two different service options.

Plan A charges $20 per month plus $5 an hour.

Plan B charges $30 per month plus $3 an hour.

y = 5x + 20 and y = 3x + 30 are the system of equations to determine how much money he can make on both plans.

y = 5x + 20..(1)

y = 3x + 30..(2)

Substitute equation 2 from equation 1.

y-y=5x+20-3x-30

0=2x-10

2x=10

Divide both sides by 2

x=5.

Now substitute x in equation 1.

y=25+20

y=45

Hence, 5 is the number of hours he works, and 45 is the total money David makes.

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[tex] {\bf \red {\huge{answer : }}}[/tex]

The dogs weight increased from 64 pounds to 80 pounds.

80 - 64 = 16

so , the dog's weight increased more 16 pounds.

[tex] \pink {\sf{hence , \frac{16}{80} \times 100 }}[/tex]

[tex] \red{= \frac{16}{8 \cancel{0}} \times 10 \cancel{0 } }[/tex]

[tex]\purple{= \frac{ \cancel{16}}{ \cancel{8 }} \times 10 }[/tex]

[tex]\blue{= \frac{ 2}{ 1} \times 10 }[/tex]

[tex] \green{2 \times 10 = 20\%}[/tex]

Therefore , the dog's weight increased by 20%

The table of values is:

Time(min)           |         Distance(mi)

0                                         0

1/2                                     2/3

1                                         4/3

9/4                                      3

8                                       32/3

1) The relationship between Distance and Time is proportional.

2) The unit rate is 4/3 miles

To complete the table, we need to find the missing values of time and distance.

We use the relation between Distance, speed and time ,to find the missing values, which is given by,

Distance = Speed x Time

Given when time = 1/2 minute, the distance = 2/3 miles

Speed = Distance/Time

           = 2/3 x 2/1

           = 4/3 mile per minute.

This is the constant speed of the cheetah. We use this constant speed to find the other values to complete the table.

So If we take 'y' as the distance and 'x' as the time, then the relationship between time and distance can be expressed as

  y = (4/3)x  [since Distance = Speed x Time ].

So this relationship is proportional because there is a constant of proportionality 4/3 in the linear equation above and hence can be graphed as well.

The graph will contain the time values on the x-axis and distance values on the y-axis.

So now we need to find the missing values on the table using the above linear equation.

When time, x = 1 minute, distance, y = (4/3) x 1 = 4/3 miles.

When distance, y = 3 miles, 3 = (4/3)x

⇒ time, x = 3 x (3/4) = 9/4 minutes.

When time, x = 8 minutes, distance, y = (4/3) x 8 = 32/3 miles.

So the table is:

Time(min)            |        Distance(mi)

0                                         0

1/2                                     2/3

1                                         4/3

9/4                                     3

8                                        32/3

The unit rate refers to the y-value when the x-value is unity(1). So the unit rate here is found when time = 1 minute.

From the table, distance when time = 1 minute is 4/3 miles.

Hence, unit rate = 4/3 miles.

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Answer:

-12y^10

Step-by-step explanation:

First let's rewrite the equation using the commutative property of multiplication
3 x (-4)y^8y^2

Multiply y^8 by y^2 by adding the exponents
y^8+y^2= y^10

3 x (-4)y^10

Now multiply 3 by -4
3 x -4= -12

Finally put them together
-12 + y^10= -12y^10

Answer:

[tex] - 12 {y}^{10} [/tex]

Step-by-step explanation:

We are to simplify:

[tex](3 {y}^{8} )( - 4 {y}^{2} )[/tex]

3 multiplies -4 to get -12, as shown below

[tex]3 \times - 4 = - 12[/tex]

Now, to multiply the exponents which are 8 and 2, we have to use the exponential rule of multiplication: [tex] {a}^{b} \times {a}^{c} = {a}^{b + c} [/tex]

Therefore:

[tex] {y}^{8} \times {y}^{2} = = > {y}^{8 + 2} = {y}^{10} [/tex]

Now, combine -12 and [tex] {y}^{10} [/tex] to get your final answer.

Final answer [tex] = - 12 {y}^{10} [/tex]

Answer:

6 miles

Step-by-step explanation:

36/2=18 mph

18/3=6 per 1/3 hour

As per the given data the required answer is 9............

Answer:

ray XZ is the angle bisector of angle WXY.

Graph of linear equation will be always straight line.

Number of ice cream cones sold be  76.

The relationship between the temperature (°F) and the number of ice cream cones sold is given by model,

                   [tex]y=1.8x-76.9[/tex]

Where x represent temperature and y represent number of ice cream cone sold.

 When temperature is  85°F  , it means that ,  x =  85°F

   So,    [tex]y=1.8*85-76.9\\\\y= 76.1[/tex]

Thus, number of ice cream cone sold is to be 76.

Learn more:

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Answer:

y-(-8)=4(x-2)

Step-by-step explanation:

This is point-slope form. Point-slope form is y-y₁=m(x-x₁), this is y minus the change in y equals slope (slope is m) times x minus the change in x. An ordered pair is (x, y). You just plug in the missing values. This will get you y-(-8)=4(x-2). I hope this helps! Also, make sure not to put the parenthesis around -8 in the actual box! They are just there to make for less confusion.

Answer:2y-2x+3

Step-by-step explanation:

Combine like terms:

3y-y+5x+3-7x

2y-2x+3

Answer:

x = -5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Geometry

Step-by-step explanation:

Step 1: Set Up Equation

69° + 62° + (x + 54)° = 180°

Step 2: Solve for x

Answer:

Step-by-step explanation:

x + 54 + 69 + 62 = 180         Every triangle has 180 degrees

x + 185 = 180                        Subtract 185 from both sides

x = - 5

The word actually is Brainly, although sometimes I think I am a bit brainless.

Answer:

the answer the other dude gave is right

Step-by-step explanation:

Answer:

hi

Step-by-step explanation:

Answer:4

Step-by-step explanation:

all 4

Answer:

im sooo sorry

Step-by-step explanation:

Answer:

i think 126 sorry if im wrong

Step-by-step explanation:

Answer:

Undefined

Step-by-step explanation:

Answer: 750 times more stars.

Step-by-step explanation:

You already know the answer (Galaxy B is quite obviously larger) but the amount of times larger is dependent on the value you get when you divide;

6 billion by 8 million (6,000,000,000/8,000,000)

...which is 750.

Answer:

x = 0

Step-by-step explanation:

6 ( x + 1 ) - 5x = 8 + 2 ( x - 1 )

6x + 6 - 5x = 8 + 2x - 2

-x = 0

x = 0

Answer:

I believe it is x= 0 but correct me if I am wrong

Answer:

Part a:

p(z=1.43) find 1.43 in z table that'll be the answer for part a

Answer:

169

Step-by-step explanation:

Answer:

The quadratic formula allows us to solve any quadratic equation that's in the form ax^2 + bx + c = 0.

Step-by-step explanation:

Answer:

Step-by-step explanation:

Step-by-step explanation:

100% = 83 minutes

1% = 100%/100 = 83/100 = 0.83 minutes

74% = 1%×74 = 0.83 × 74 = 61.42 minutes

Answer:

23.7

Step-by-step explanation:

B(x) = 25.50 - 0.06x

B(30) = 25.50 - 0.06(30)

B(30) = 25.50 - 1.8

B(30)= 23.7

Hope this help I suck at explaining