what is the difference between 25 and 21.2?

Answer:

399

Step-by-step explanation:

Factor the polynomial, and that will give you 399.

Using factor (156 + 243), can be rewritten as  3.(52+81).

Factor is a number  that devides any other number and does not leave any remainder.

The given term is,

(156 + 243)

The factor of 156 = 2×2×3×13

The factor of 243 = 3×3×3×3×3

The common factor is 3,

So (156 + 243) can be rewritten as,

3(2×2×13+3×3×3×3)= 3.(52+81).

So, the required term is 3.(52+81).

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The length of the building in the scale drawing is 31. 25 Inches

From the information given, we have that;

Then,

If 0. 25 inches = 2 feet

Then x inches = 250 feet

cross multiply
x × 2 = 0. 25 × 2500

Multiply through, we have;

2x = 62. 5

Make 'x' the subject by dividing both sides by 2

2x/2 = 62. 5/ 2

x = 31. 25 Inches

Thus, the length of the building in the scale drawing is 31. 25 Inches

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Answer:

Step-by-step explanation:

31.25

The lowest common denominator for 4/21, 3/7, 4/9 is 63.

Lowest common denominator is the lowest number that is divisible by the denominators of the set of fractions.

Step 1:  we will write down the prime factors of all the denominators.

[tex]21=7^{1} *3^{1}[/tex]

[tex]7=7^{1}[/tex]

[tex]9=3*3=3^{2}[/tex]

Step 2 : write down highest power of each prime number.

[tex]7^{1} ,3^{2}[/tex]

Step 3 : Multiply the values

7x9=63

Therefore , The lowest common denominator for 4/21, 3/7, 4/9 is 63.

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Part(A) Leslie's initial investment was $500 and

Part(B) The quarterly interest rate is 10.4 %

What is compound interest?

Compound interest is the interest calculated on the principal amount , which also considers all the accumulated interest of previous periods of deposit or loan.

If P is the principal amount and rate of compound interest is r  then after t years of time , the present amount (if the interest is compounded annually) will be = P(1+(r/100))^n

If the interest is compounded quarterly, then the present amount be A

Where A = [tex]P (1+\frac{r/4}{100} )^{4t}[/tex]

Given that Leslie invests in a bank that earns interest quarterly , and account balance after t years is given as 500(1.026)^(4t)

A= [tex]P (1+\frac{r/4}{100} )^{4t} = 500(1.026)^{4t\\[/tex]

Comparing both sides we get P = 500

And 1+(r/400)=1.026

(r/400)=1.026-1

(r/400)=.026

r=400(0.26) = 10.4 %

Therefore , Leslie's initial investment was $500 and the quarterly interest rate is 10.4 %

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The accurately captures a system's gravitational potential energy:

ME = KE + GPE.

Gravitational potential energy is the energy that an object possesses or acquires as a result of a change in its position when it is in a gravitational field. In layman's terms, gravitational potential energy is energy that is tied to gravitational force or gravity.

The energy held in an object due to its height above the ground is known as gravitational potential energy. It is determined by the object's mass, the gravitational acceleration caused by the Earth, and the object's height. Kinetic energy is the energy that an object possesses as a result of its motion.

An object's mechanical energy is equal to the sum of its kinetic energy and potential energy. If ME is mechanical energy and KE is kinetic energy, then PE is its potential energy.

ME = PE + KE

KE = (1/2) mv^2

PE = ME - KE

PE = ME - 1/2(mv²)

PE = ME - 1/2(mv²)

PE = ME - KE

ME = KE + GPE

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Answer:

B

Step-by-step explanation:

ME equals the sum of KE and GPE

The inequality notation for the given interval is -∞ < x ≤ -11 and -8 ≤ x < ∞

Disclaimer:

Considering the given interval as (-∞, -11] ∪ [-8, ∞).

Given interval is a union of two intervals.

The first interval denotes the set of all real numbers which are less than or equal to -11.

And the second interval denotes the set of all real numbers which are greater than or equal to -8.

The inequalities can be written as below:

(-∞, -11] ⇒ x ≤ -11 (or) -∞ < x ≤ -11

[-8, ∞) ⇒ x ≥ -8 (or) -8 ≤ x < ∞

And there is a union symbol between these two intervals.

So, x should satisfy both inequalities.

x ≤ -11 and x ≥ -8

or the above can be written as

-∞ < x ≤ -11 and -8 ≤ x < ∞

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Answer:

Hello,

Step-by-step explanation:

[tex]u_2=u_1*r\\u_3=u_1*r^2\\u_4=u_1*r^3\\\\\dfrac{u_4}{u_3} =r=\dfrac{-56}{28} =\boxed{-2}\\\\u_1=\dfrac{u_3}{r^2} =\dfrac{28}{(-2)^2} =\dfrac{28}{4}=\boxed {7}\\\\\\\displaystyle\ s=\sum_{i=1}^6\ u_i\\\\=u_1*\sum_{i=1}^6\ r^{i-1}\\\\=7*\dfrac{(-2)^6-1}{-2-1} \\\\=-7*\dfrac{65}{3} \\\\\\\boxed{s=-\dfrac{455}{3} }\\[/tex]

Answer:

Its C: 5 3/4

Step-by-step explanation:

1: First we figure out how many times 4 goes into 23

4 goes into 23 5 times. So our whole number will be 5

2: Now, we put our remainder on the top and keep the denominator the same

Making the fraction - 3/4

5¾

-16m - 72k + 104  is the simplified expression .

What does a math expression mean?

the simplified expression of -8(2m + 9k-13)

 = -8(2m + 9k-13)

 = -16m - 72k + 104

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Step-by-step explanation:

what??? I don't understand what are you saying?????? please speak english :(

i wish you could help you but i don't know what you're saying

The solution to the system of equation is (7/5, 22/5)

Given the system of equation as shown below;

4x + y = 10 * 2

3x - 2y = 13 * 1

_____________

8x + 2y = 20

3x - 2y = 13

Subtract

8x - 3x = 20 - 13

5x = 7

x = 7/5

Substitute the value of x into any of the equation

4x + y = 10

4(7/5) + y = 10

28/5 + y = 10

y = 10 - 28/5

y = 22/5

Hence the solution to the system of equation is (7/5, 22/5)

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The number of hours needed for the second press to complete the job is 3 hours.

An equation represents the relationship of two expressions on either side of the sign

Given that together they can complete a job in 2 hours and one takes 6 hours to complete the work alone.

If we let x = amount of time required for the second press to complete the job alone

We can write as:

Second press work = 1/x of the job per hour.

First press work = 1/6 of the job per hour.

Together work = 1/2 of the job per hour.

We can write the equation as:

1/6 + 1/x = 1/2

1/x = 1/2 - 1/6

1/x =  (3 - 1)/6

1/x = 2/6

1/x = 1/3

x = 3

Thus number of hours needed for the second press to complete the job is 3 hours.

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Answer:

y= 6/5 x -5

Step-by-step explanation:

You have 2 points. (0,-5) and (5,1)

If you use the formula Y2-Y1 / X2-X1,

you will have 1 - (-5) on the numerator, which equals 6

you will have 5 - 0 in the denominator, which equals 5

6/5 is your slope, and the point on the y-intercept is what you put at the end of the equation.

The required probability that a patient had surgery and experienced a major improvement 31% and that a patient received nonsurgical treatment 14.5%.

Probability can be defined as the ratio of favorable outcomes to the total number of events.

Here,
Number of patients who got surgery  = 398,
63% of  percent said they had a major improvement in their condition,
= 0.63 * 398 ≈ 250
29% among those who received nonsurgical treatment,
= 0.29 * (803 - 398)
= 0.29 * 405
≈ 117

Now,
The probability that a patient had surgery and experienced a major improvement in his or her condition.
= 250 / 803
= 31%

The probability that a patient received nonsurgical treatment and experienced an improvement in his or her condition.
= 117 / 803
= 14.5%

Thus, the required probability is 31% and 14.5%.

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(35x) + (-56) this is an equivalent equation.

Answer:

7x(-4x+5)

Multiplying: -56+35x

Step-by-step explanation:

[tex]\mathrm{Factor\:assuming\:x\ge-\\\infty}\\\:a^{b+c}=a^ba^c\\x^2 = xx\\-28xx+35x\\-7 \times 4xx + 7 \times 5x\\=7x\left(-4x+5\right)[/tex]

The only reason I had to assume x was any negative number was so that the absolute value did not matter in this instance, therefore making x become a negative number.

The other result, however, came from this:

[tex]-28\cdot \:2=-56\\=-56+35x[/tex]

Inform me of any concerns. Hope this helps.

A sample of n = 100 scores has a mean of 5. A second sample has n = 25 scores and m = 7. if the two samples are combined, the sample mean for the combined sample will be 5.4.

We are given the sample mean of n = 100, is 5. Therefore, the sum of 100 observations is 100 x 5 = 500

The sample mean of n = 25, is 7. Therefore, the sum of 25 observations is

25 x 7 = 175

The sum of two samples is 500 + 175 = 675.

And the sum of two sample size is 100 + 25 = 125

Now, the combined mean is:

675125=5.4

A dataset's mean(also known as the arithmetic mean, which differs from the geometric mean) is calculated by dividing the sum of all values by the total number of values. It is frequently referred to as the "average" and is the most widely used measure of central tendency.

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Answer:51 degrees

Step-by-step explanation:

At noon the temperature is 75 degrees

the temperature drops 3 degrees every half hour.

First solve for time elapsed between noon and 4, which is 4 hours.

Next, we can change our rate to be in terms of full hours instead of half hours using the fact that 1 hr = 2 half hours, so the temperature drops 6 degrees every hour.

Four hours have elapsed so multiply 6*4 = 24 degrees and then subtract it from the starting 75

75 - 24 = 51.

Answer:

x = 10

Step-by-step explanation:

the angle is equally bisected from the middle so

3x - 3 = 4x - 13

13 - 3 = 4x - 3x

x = 10

<FGH = 3(10) - 3 = 27

< HGI = 4(10) - 13 = 27

<FGI = <FGH + <HGI = 27 + 27 = 54

We have to draw the model for 5 divide 1/7 . In order to draw the model we use below steps.

Draw 1/7 boxes to represent 1/7 groups.

Assume 5 as the number which represents the total of these 1/7 groups.

Put a question mark at the first box.

Attached is the model to represents 5 divide 1/ 7 .

5/(1/7)

5*7

35

In the question mark we should put 35.

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Answer:

(2/7)

Step-by-step explanation:

As far as I know, an absolute value number is never negative. So you would do |-26/91| which would give you the positive fraction of (2/7). I don't think the fraction could get any simpler than that.

Answer: Slope: 3

Step-by-step explanation:

Slope formula: m=(y2-y1)/(x2-x1)

m=(4-(-2))/(3-1)

m=(4+2)/2

m=6/2

m=3

Answer:

I believe the answer would be 384

Step-by-step explanation:

4×-8 (5× -3+3)

-32 × -12

384

BOOM!!! Your Welcome

The digits that make the given statement true are 3 or 7.

So, 5,156,9_6 to be divisible by 4:

Therefore, the digit that makes the given statement true is 3 or 7.

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The correct question is given below:
Type a digit that makes this statement true.

5,156,9_6 is divisible by 4.

Answer: 99,999

Step-by-step explanation:

Answer:

The terms are 2, 6 and 12

The sum  is 20

Step-by-step explanation:

n      n + 1            n(n+1)
--      -------           ---------
1         2               1 x 2 =  2
2        3               2 x 3 =  6
3         4               3 x 4 = 12
The terms are 2, 6 and 12
The sum  is 2 + 6 + 12 = 20

The number of cups of milk when represented as fraction is expressed as 1/2 cup.

Given a recipe indicates 0.5 cup of milk.

A numerical value that designates a portion of a whole is used to represent fractions.A fraction is a part or portion that is taken from the total, which might be any number, a specific sum, or an item.

To convert it into fraction, we first need to remove the decimal.

5/10

when 5 is divided by 10 we get 0.5, hence we have removed the decimal and converted it into its orignal form.

Now multiply and divide by 5.

= 5 × 5/10 × 5

= 1/2

we get the fraction part as 1/2

Hence 0.5 cup of milk represent 1/2 cup of milk as a fraction.

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The acres of vacant land that the county have now will be 144 acres.

Since 36% has been used, the remaining percentage will be:

= 1 - 36%

= 64%

Therefore, the acres of vacant land that the county has now will be:

= 64% × 225

= 64/100 × 225

= 0.64 × 225

= 144

Therefore, the acres of vacant land that the county have now will be 144 acres.

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Answer:

3.64

Step-by-step explanation:

collect like terms

divide both sides by x coefficient

Answer:

x=51/14

Step-by-step explanation:

28x-2=100

+2. +2

28x=98

28x/28=102/28

×=51/14

Answer:

2.667

Step-by-step explanation:

the thousandths place is the third place after the decimal point, going

0.123

1 is the tenths

2 is the hundredths

3 is the thousands

all you have to do is divide 4 by 15 to get 2.66666667

rounded to the thousands the answer is about 2.667