Walker reads for 25 minutes each day. Martin reads for 55 minutes a day. How many more minutes does Martin read than Walker in 19 days?

Answer:

y= 1/2x-2

Step-by-step explanation:

Answer:

We can say we start with 490 grams and after 1 year we have (490 * .81 grams) or 396.9 grams.

We can solve for half-life by this equation:

Half life = (time * log 2) / log (beginning amount / ending amount)

Half-life = (1 year * 0.30102999566) / log (490 / 396.9)

Half life = (1 year * 0.30102999566) / log (1.2345679012 )

Half life = (0.30102999566) / 0.091514981109

Half-Life = 3.2894067399  years

Well, that's a start.

Step-by-step explanation:

The half life of the given radioactive isotope will be 3.2894067399  years.

The amount of time it takes to disintegrate by half an initial amount. For a given reaction, a reactant's half-life t-1/2 is the time it takes for its concentration to reach a value which is the arithmetic mean of its initial and final value.

Here, Element X starts with 490 grams

After 1 year we have  (490 X 0.81 grams) or 396.9 grams

Now, We can solve for half-life by this equation:

Half life = (time  X log 2) / log (beginning amount / ending amount)

Half-life = (1 year X 0.30102999566) / log (490 / 396.9)

Half life = (1 year X 0.30102999566) / log (1.2345679012 )

Half life = (0.30102999566) / 0.091514981109

Half-Life = 3.2894067399  years

Thus, the half life of the given radioactive isotope will be 3.2894067399  years.

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Answer:

the unknown side of triangle is 15 in :)

Answer:

x = 20

Step-by-step explanation:

Since the two angles are vertical, they are equal.

That means

3x + 50 = 6x - 10

60         = 3x

20         = x

Answer:

[tex]x=20[/tex]

Step-by-step explanation:

[tex]We\ know\ that,\\"When\ two\ lines\ intersect\ the\ pair\ of\ Vertically\ Opposite\ Angles\\ are\ always\ equal"\\Here,\\As\ the\ lines\ intersect\ each\ other,\ the\ angle\\ measuring\ (3x+50)\ and the\ angle\ measuring\ (6x-10)\ are\ equal.\\Hence,\\3x+50=6x-10\\3x-6x=-10-50\\-3x=-60\\x=\frac{-60}{-3}\\x=20[/tex]

Answer:

the answer is 114,210..................

Answer:

[tex]y = -2x + 10[/tex]

Step-by-step explanation:

Slope: [tex]m = \frac{y_{2}-y_{1} }{x_{2}-x_{1}}[/tex]

Slope-Intercept Form: [tex]y=mx+b[/tex]

[tex]m=\frac{8-0}{1-5}[/tex]

[tex]m = -2[/tex]

[tex]y = -2x + b[/tex]

[tex]0 = -2 (5)+b[/tex]

[tex]0=(-10)+b[/tex]

[tex]b = 10[/tex]

[tex]y = -2x + 10[/tex]

Answer:

20

Step-by-step explanation:

Solving  for x using the vertical angles we get , the value of x is: x = 20.

Here, we have,

from the given figure we get,

angle (2 + 3x) and angle62 are opposite angles.

we know that,

When two lines intersect each other, then the opposite angles, formed due to intersection are called vertical angles or vertically opposite angles. A pair of vertically opposite angles are always equal to each other.

so, we have,

angle (2 + 3x) = angle62

(2 + 3x) = 62

or, 3x = 60

or, x = 20

Hence, Solving  for x using the vertical angles we get , the value of x is: x = 20.

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Answer:

y = 1/2x + 4 1/2

Step-by-step explanation:

Answer:

Option C. 154 cm²

Step-by-step explanation:

From the question given above, the following data were obtained:

Pi (π) = 22/7

Diameter (d) = 14 cm

Area (A) =?

Next, we shall determine the radius of the circle. This can be obtained as follow:

Diameter (d) = 14 cm

Radius (r) =?

r = d/2

r = 14/2

r = 7 cm

Finally, we shall determine the area of the circle as illustrated below:

Pi (π) = 22/7

Radius (r) = 7 cm

Area (A) =?

The area of a circle can be obtained by using the following formula:

A = πr²

A = 22/7 × 7²

A = 22/7 × 7 × 7

A = 22 × 7

A = 154 cm²

Thus, the area of the circle is 154 cm²

Answer:

area of circle=π(14/2)²=22/7 ×7²=22×7=154cm²

Answer:

Carter;

5 ( x + 9 ) - 3x = 2x + 45

Step-by-step explanation:

Simplify the equation;

5 ( x + 9 ) - 3x

Distribute the 5, remember, you have to distribute 5 over both terms.

5x + 45 - 3x

Combine like terms;

2x + 45

Answer:

a

Step-by-step explanation:

a

Answer:

thank you for the points :D

Step-by-step explanation:

Based on the calculations, the value of x for this regular polygon with the given interior angle is equal to 3.

A polygon can be defined as a two-dimensional geometric shape that comprises straight line segments and a finite number of sides. Also, some examples of a polygon include the following:

Note: The number of sides (n) of a hexagon is 6.

In Geometry, the sum of the interior angles of both a regular and irregular polygon is given by this formula:

Sum of interior angles = 180 × (n - 2)

Sum of interior angles = 180 × (6 - 2)

Sum of interior angles = 180 × 4

Sum of interior angles = 720°.

Next, we would determine the value of x by using this formula:

Interior angle × Number of sides = Sum of interior angles

Substituting the parameters into the formula, we have;

(-134x + 516 + 2x) × 6  = 720

-134x + 516 + 2x = 720/6

-134x + 516 + 2x = 120

516 - 120 = 134x - 2x

396 = 132x

x = 396/132

x = 3.

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Answer: First Option (5√5)

Answer:

First, you see if there are any perfect squares that are a factor of 125. If you do find some, find what is seemingly the biggest. In this case, it is 25, I think. So you can then out it as root(25×5), I think. As 25 is a perfect square, you can square and then put the number you get on the outside. So since 5×5=25, it becomes 5(root)5, which essentially means 5×(root)5, I think.

Dave's rate of completion is 4/3 walls per hour and this can be determined by using the concept of unit rate.

Given :

The following steps can be used in order to determine Dave's rate of completion:

Step 1 - The concept of unit rate can be used in order to determine Dave's rate of completion.

Step 2 - According to the given data, Dave completes on average 2/3 of a wall in 1/2 of an hour.

Step 3 - Now, let Dave's rate of completion be 'x'.

Step 4 - So, the value of 'x' can be calculated as:

[tex]x = \dfrac{\dfrac{2}{3}}{\dfrac{1}{2}}[/tex]

Step 5 - Simplify the above expression.

[tex]x = \dfrac{2}{3}\times\dfrac{2}{1}[/tex]

[tex]\rm x = \dfrac{4}{3}\;walls \;per \;hour[/tex]

Therefore, Dave's rate of completion is 4/3 walls per hour.

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Answer: 6) 15 1/10

Step-by-step explanation:

Add the whole numbers and then find a common number for the bottom fraction. So that'd be ten. To get to ten from 2 you'd multiply by five then multiply the top number by five too. That gets you 5/10 and do the same for the other fraction. Get the bottom number to ten then whatever you multiply by do the same to the top. After doing that putting the fractions together which gets you 11/10. That'd make 1 1/10 so that makes it 15 instead of 14 whole

Answer:

answer is 15 1/10 or 151/10

Answer:

x= -7, y= 12

Step-by-step explanation:

To find the value of x and y, first label the 2 equations.

2x +y= -2 -----(1)

x +y= 5 -----(2)

(1) -(2):

2x +y -(x +y)= -2 -5

2x +y -x -y= -7 (expand bracket)

x= -7

subst. x= -7 into (2):

-7 +y= 5

y= 5 +7 (+7 on both sides)

y= 12

Answer:

y=-93

Step-by-step explanation:

You just substitute 10 for x

y=-7(10)-23

y=-70-23

y=-93

Answer:

6552

Step-by-step explanation:

P.S Can I have brainliest?

Answer:

6,552

Step-by-step explanation:

Answer:

i believe the answer is x=6

Step-by-step explanation:

12x + 4 = 2(5x + 8)

12x + 4 = 10x + 16

12x - 10x = 16 - 4

2x = 12

2x/2=12/2

x=6

Answer:

(x+2) (x+1) (x-1)

Step-by-step explanation:

You would add and subtract the second term to the expression  

Factor x3+2x2−x−2

x3+2x2−x−2

=(x+2)(x+1)(x−1)

Answer:

11

Step-by-step explanation:

divide 209 by 19 to get an equal number of games each month (for 19 months), you will get 11 games each month.

Answer:11

Step-by-step explanation:Because 209 divided by 19

Answer:

OAB is 90°

Explanation -

Given - A circle with centre O

According to the theorem , The tangent of a circle and the line of tangency make an angle of 90°

Answer:

Max is 26 pounds.

We know the bags are 250% of 26.

26(2.50) = 65

The bags are 65 pounds.

Answer:

I think the answer is 42.

Step-by-step explanation:

If there is a 50% increase in members then the number of members would go up 14. Adding 14 to 28, you come away with 42.

Sorry if it's wrong.

Answer:Students could also work backwards from 76 toothpicks to find the number of hexagons in a row. 6% could subtract out the first hexagon (76-6) and divide the remainder by 5 (70/5=14), but they forgot to add back on the original hexagon to get 15.

Step-by-step explanation:

Answer:

X= -5

Step-by-step explanation:

y varies directly with x,

so y=kx

-34=k×2

k= -17

85= -17× X

X= -5