evaluate 10 + 8÷4 - 12

Answer:

x-4*2

Step-by-step explanation:

Since we dont know the number, we can make it a variable. So, x is the unknown number.

4 less will mean subtraction. So. x-4.

Next we have to multiply with 2.

So, the expression is x-4*2.

It will take 4 year for the account to reach $5,500.

The formula we use to calculate the amount is

A = P(1+r)¹

Where, P= amount of money invested

r = interest rate percentage in decimal form

t = time in years

A = total money in the account at time

Tina wants to save money for school.

Tina invests $400 in an account that pays an interest rate of 8%.

A = P(1+r)¹

5500 = 400(( 1 + 0.08)^t

5500/ 400 = ( 1 + 0.08)^t

55/ 4 = (1.08)^t

13.75 = (1.08)^t

t = 4

It will take 4 year for the account to reach $5,500.

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Answer:

100.05

Step-by-step explanation:

9.5 and multiple it by 5

The volume of the pyramid would be 2406.16 cubic cm.

Supposing that:

The length of the sides of the square base of the pyramid has = b units

The height of the considered square-based pyramid = h units,

The pyramid below has a square base.

h = 24.4 cm

b = 17.2 cm

Then, its volume is given by:

[tex]V = \dfrac{1}{3} \times b^2 \times h \: \rm unit^3[/tex]

[tex]V = \dfrac{1}{3} \times 17.2^2 \times 24.4 \: \rm unit^3\\\\V = 2406.16[/tex]

Therefore, the volume of the pyramid would be 2406.16 cubic cm.

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Answer:

7 years

Step-by-step explanation:

The discrete data is (b) while the continuous data are (a) and (d)

These are data that can be represented using positive whole numbers.

Using the above definition as a guide, the discrete data is (b) The number of books in your apartment

These are data that can be represented using decimal numbers.

Using the above definition as a guide, the continuous data are (a) The weight of cows  and (d) The ounces of water that you drink each day

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Answer:

Hi,

Step-by-step explanation:

We can't solve that but reduce it to the same denominator.

[tex]\dfrac{x+5}{x}+\dfrac{x+8}{x-1}\\\\=\dfrac{(x+5)(x-1)+x(x+8)}{x(x-1)}\\\\=\dfrac{x^2+5x-x-5+x^2+8x}{x(x-1)}\\\\=\dfrac{2x^2+12x-5}{x(x-1)}\\[/tex]

All circles are similar because radius is constant throughout the circle.

Every point on a circle's perimeter is equidistant from its center. We utilize the radii to get the scale factor since the size of each circle is specified by its radius.

A quality of at least two forms in relation to each other is similarity. When two forms are similar, their qualities in relation to one another remain the same.

A circle is characterized by two properties: its center and radius.Because similarity is unaffected by location  the similarity of circles is solely determined by their radii.

Hence,all circles are similar because radius is constant throughout the circle.

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Answer:

$12

Step-by-step explanation:

x+2y=82........(1)

3x+y=96.........(2)

y=96-3x...........(3)

x+2y=82

x+2(96-3x)=82

x+192-6x=82

-5x=82-192

-5x=-110

x=-110÷-5

x=22

y=96-3x

y=96-3(22)

y=96-66

y=30

Therefore,x=22 and Y=30

so silver= x =22

gold= y = 30

y=30;x=22

=30-22

-12

Therefore $12

Answer:

it's 15

Step-by-step explanation:

just do ( 5× 2) = (10+5)=15

The original height  of the water in a pool is 5 ft , Option B is the correct answer.

An equation can be defined as a mathematical statement when two algebraic expressions are equated using an equal sign.

It is given in the question that

A leak in a pool causes the height of the water to decrease by 0.25 foot over 2 hours.

the height of the water is 4.75 feet.

The equation

4.75 = x + (negative 0.25)

can be used to find x, the original height of the water in a pool.

4.75 = x - 0.25

x = 5

Therefore the original height  of the water in a pool is 5 ft , Option B is the correct answer.

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Answer:

B

Step-by-step explanation:

Answer:

The mean absolute deviation of this sample is 13.

Step-by-step explanation:

Mean absolute deviation is the sum of the absolute value of the differences between data values and the mean, divided by the sample size.

Answer:

C

Step-by-step explanation:

[tex]\textsf {Given :}[/tex]

[tex]\mathsf {x - 5 \leq -13}[/tex]

[tex]\textsf {Add 5 to each side of the inequality : }[/tex]

[tex]\mathsf {x - 5 + 5 \leq -13 + 5}[/tex]

[tex]\mathsf {x \leq -8}[/tex]

The number of night of work each performers will have equal amount is 1 night

The buskers gets permit which cost $30. They can make an average of $45 per night (n),

Therefore,

y = 45n - 30

Without a permit they may only make an average of $15 per night.

Therefore,

y = 15n

The number of night the money made are both equal.

45n - 30 = 15n

45n - 15n  = 30

30n = 30

n = 30 / 30

n = 1

Therefore, the number of night of work each performers will have equal amount is 1 night

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The length of the bike path, to the nearest meter, is effectively illuminated by the light is 138 m

The missing diagram is attached with the answer.

The angle formed between the horizontal line and line of sight is called Angle of Elevation.

It can be seen in the diagram that

It is a right angled triangle if extended and

cos 23 degree = (length of the bike path)/Hypotenuse

Hypotenuse here is the point on a bike path is 150 m from the light

Therefore

cos 23 ° = x / 150

x = 0.92 * 150

x = 138 m

Therefore The length of the bike path, to the nearest meter, is effectively illuminated by the light is 138 m.

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Answer:

irrational

Step-by-step explanation:

what are rational numbers ?

every number that can be expressed as a/b, with a and b being integer numbers, and b different to 0.

the square root of any number that is not a squared rational number is then an irrational number.

I am not sure, if the expression here is

sqrt(13) + 4

or

sqrt(13 + 4), which would then be sqrt(17).

but in both cases we are creating the square root of a not- squared rational number.

neither 13 nor 17 are the result of a multiplication of a rational number with itself.

in fact, 13 and 17 are prime numbers with no other factors than either 1 or themselves.

so, both, sqrt(13) and sqrt(17) are irrational numbers.

adding or subtracting rational numbers to irrational numbers result again in irrational numbers.

Hi student, let me help you out! :)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

We are asked to find out if [tex]\pmb{\sqrt{13} +4}[/tex] is rational or irrational.

[tex]\triangle~\fbox{\bf{KEY:}}[/tex]

So, can we write [tex]\pmb{\sqrt{13} +4}[/tex] as a fraction? We can write 4 as a fraction, but we cannot write [tex]\pmb{\sqrt{13}}[/tex] as a fraction, because this number has infinitely many digits after the decimal point, and they never repeat; there's no pattern at all!

And even if we add 4, which is a rational number, to [tex]\pmb{\sqrt{13}}[/tex], we'll still get an irrational number.

Thus, [tex]\pmb{\sqrt{13}+4}[/tex] is irrational.

Hope it helps you out! :D

Ask in comments if any queries arise.

#StudyWithBrainly

~Just a smiley person helping fellow students out :)

Answer:

3/7

Step-by-step explanation:

He took 6 out of 14 so that is 6/14 then simplify it to 3/7

Answer:

B

Step-by-step explanation:

You can not know the original price unless you know the taxes percentage.

Answer:

115.5

Step-by-step explanation:

the car is traveling at precisely 52.5 miles an hour

Answer:

B. y=-0.5x + 1

Step-by-step explanation:

first look at the slope: slop = rise over run. for every 2 units right, the point goes 1 unit down. so the slope if -1/2 or -0.5

next look at the y-intercept. the y-intercept of this graph is 1

plug these into the equation y= mx + b to get y = -0.5x + 1

Answer:

A. y = -0.5x + 1

Step-by-step explanation:

Hello!

An equation of a line is written in slope-intercept form: [tex]y = mx + b[/tex]

The y-intercept is found when x=0, or then the line crosses the y-axis.

Over here, we can see that the line crosses the y-axis at point (0,1), so the y-intercept is positive 1.

Slope is calculated by rise over run, or the ratio of how much the graph rises over how much the graph runs. Use points to determine how the graph changes. (For simple calculations, use integer points, such as (0,1) and (0,2)

Now that we have the slope and the y-intercept, we can plug those values to make our equation.

The correct answer is Option A. y = -0.5x + 1

Answer:

A. 56.5 cm

Step-by-step explanation:

circumference of the circle is Pi times diameter

diameter is radius times 2

diameter is 9 times 2

diameter is 18

circumference of the circle is Pi times 18

circumference of the circle is 3.14 times 18

circumference of the circle is 56.52

Answer:

Missing number is 288, and the rule is +96

Step-by-step explanation:

First subtract 96 from 192, which is 96

then add that to 192 and the missing value is 288

you should also add 96 to 288 just to make sure it gets you to the last number which is 384.

An exponential decay function, and use it to approximate the population in 2027 is P(t) = 4001e^-(0.0037)(28) = P(t) = 4001e^-0.1036

The standard exponential function is expressed as:

P(t) = P0e^-rt

Substitute

P(t) = 4001e^-(0.0037)t

If t = 28 (by 2027)

An exponential decay function, and use it to approximate the population in 2027 is P(t) = 4001e^-(0.0037)(28) = P(t) = 4001e^-0.1036

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Answer:

$1,144.57

Step-by-step explanation:

1,451.54 + 393.03 = 1844.57

1,844.57 - 700 = 1,144

Answer:

  41.3%

Step-by-step explanation:

The probability of interest is found by dividing the number of students passing either course by the total number of students.

The number passing only one of the courses is the number passing that course, less the number passing both courses. This is shown in the attached 2-way table.

__

The number passing either course will be the sum of the number passing one course (including the number passing both courses), and the number passing only the other course. It can also be found as the sum of the numbers passing either course, less the number passing both courses (since the latter would be counted twice).

Here those passing either (or both) Math or English will be ...

  90 +(85 -78) = 85 +(90 -78) = (90 +85) -78 = 97

So, the probability is ...

  p(passing either M or E) = 97/235 = 0.41277 ≈ 41.3%

Step-by-step explanation:

hope you can understand

[tex]~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{-4}~,~\stackrel{y_1}{-3})\qquad (\stackrel{x_2}{-8}~,~\stackrel{y_2}{7})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d=\sqrt{[-8 - (-4)]^2 + [7 - (-3)]^2}\implies d=\sqrt{(-8+4)^2 + (7+3)^2} \\\\\\ d=\sqrt{(-4)^2 + 10^2}\implies d=\sqrt{116}\implies d\approx 10.77[/tex]

Step-by-step explanation:

part 1

6y = 42

part 2

x - 15 = 62

product means multiplication and difference means subtraction.

hope this helps

Answer:

5.3 is 5.259 rounded into the tenths place.