The cost per week of running a boarding house is partly constant and partly
varies with the number of students in the hostel. If it costs N3500.00 a week for
25 students, and N6000.00 for 50 students. Find the cost of running the boarding
house for 600 students.​

Answer:

[tex]a\times (-a)\times 13\times a\times (-a)\times 13[/tex] can be written in power notation as [tex]a^{4}\times 13^{2}[/tex]

Step-by-step explanation:

The given expression

[tex]a\times (-a)\times 13\times a\times (-a)\times 13[/tex]

Writing a\times (-a)\times 13\times a\times (-a)\times 13 in power notation:

Let

[tex]a\times (-a)\times 13\times a\times (-a)\times 13[/tex]

= [tex][13\times13][(a\times (-a)\times a\times (-a)][/tex]

As

[tex]13\times13 = 13^{2}[/tex] , [tex]a\times a = a^{2}[/tex] , [tex](-a)\times (-a) = (-a)^{2}[/tex]

So,

[tex]=[13^{2}][a^2\times (-a)^2][/tex]

As

[tex](-a)^2 = a^{2}[/tex]

So,

[tex]=[13^{2}][a^2\times a^2][/tex]

As ∵[tex]a^{m} \times a^{n}=a^{m+n}[/tex]

[tex]=[13^{2}][a^{2+2}][/tex]

As ∵[tex]a^{m} \times a^{n}=a^{m+n}[/tex]

[tex]=13^{2}\times a^{4}[/tex]

[tex]=a^{4}\times 13^{2}[/tex]

Therefore, [tex]a\times (-a)\times 13\times a\times (-a)\times 13[/tex] can be written in power notation as [tex]a^{4}\times 13^{2}[/tex]

Keywords: power notation

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Answer:

3/4 gallon

Step-by-step explanation:

we know that

Chloe uses 1/4 gallon of paint to cover 1/3 of a wall

so

using proportion

Find out how much paint she will need to cover one wall

Let

x ---> paint needed to cover one wall

[tex]\frac{(1/4)}{(1/3)}=\frac{x}{1}\\\\x=\frac{1}{4} :\frac{1}{3}\\\\x=\frac{3}{4}\ gal[/tex]

Answer:

1915 miles more to drive to complete their trip.

Step-by-step explanation:

Given:-

Total distance to travel (D) = 2598 miles.

Distance travelled (d) = 683 miles.

To calculate = remaining distance (r) to complete trip.

Remaining distance = Total distance minus Distance travelled

i.e.  [tex]r=D-d[/tex]

[tex]r=2598-683[/tex]

[tex]r=1915\ miles[/tex]

Therefore kalsbeeks have to travel 1915 miles more to complete their trip.

Answer:

The correct option is E. 8

The value of h is 8 unit.

Step-by-step explanation:

Given:

Δ BAD ~ Δ CBD

AC = 20

DC = 4

∴ [tex]AD = AC - DC=20-4=16[/tex]

To Find:

h = ?

Solution:

Δ BAD ~ Δ CBD      ................Given

If two triangles are similar then their sides are in proportion.

[tex]\frac{BD}{CD} =\frac{AD}{BD} =\frac{BA}{CB}\ \textrm{corresponding sides of similar triangles are in proportion}\\[/tex]  

On substituting the given values we get

[tex]\dfrac{BD}{CD} =\dfrac{AD}{BD}[/tex]

[tex]\dfrac{h}{4} =\dfrac{16}{h}\\\therefore h^{2}=64\\\therefore h=8\ unit[/tex]

The value of h is 8 unit.

Answer:

8

Step-by-step explanation:

To prove congruence by SSS, two statements are needed about equal sides: AC―――― ≅ ED―――― and DE―――― ≅ BC――――. A third unlisted statement equating the other sides is also required.

To prove two triangles are congruent using the Side-Side-Side (SSS) Postulate, we need to establish that all three corresponding sides of the triangles are equal in length. Statement B indicates that AC―――― ≅ ED――――, which provides one pair of corresponding sides. Statement C suggests that DE―――― ≅ BC――――, providing a second pair of corresponding sides. Lastly, if we had information that AB―――― = DF――――, not provided in the options but necessary to complete the SSS congruence, then we could establish the congruence of the two triangles. Therefore, the statements needed for SSS congruence proof are options B and C, along with an unlisted statement that equates the third pair of corresponding sides.

Answer:

The actual length in feet of the car is 48 feet.

Step-by-step explanation:

Given:

Tiffany sketched a picture of a car she used the scale 2 inches : 12 feet.

In her sketch the car is 8 inches long.

Now, to find the length in feet of the actual car.

Let the actual length of car in feet be [tex]x\ feet.[/tex]

And the length of car in her sketch is 8 inches.

Thus, 8 inches is equivalent to [tex]x\ feet[/tex].

So, the ratio of the scale used by Tiffany as given is 2 inches : 12 feet.

Thus, 2 inches is equivalent to 12 feet.

Now, to get the actual length of car by using cross multiplication method:

[tex]\frac{2}{12} =\frac{8}{x}[/tex]

By cross multiplying we get:

⇒  [tex]2x=96[/tex]

Dividing both sides by 2 we get:

⇒  [tex]x=48[/tex]

⇒  [tex]x=48\ feet.[/tex]

Therefore, the actual length in feet of the car is 48 feet.

Picture 1: The amount of tax for Veena's meal is $1.02

Picture 2: Christian reads [tex]\frac{3}{8}[/tex] books per week.

Picture 3: 80% is equal to [tex]\frac{4}{5}[/tex].

Step-by-step explanation:

Picture 1: Veena ate lunch at a deli. She ordered turkey sandwich for $9.25 and a salad for $4.35. The tax was 7.5%. What is the amount of tax for Veena's meal.

Given,

Price of turkey sandwich = $9.25

Price of salad = $4.35

Total amount = 9.25+4.35 = $13.60

Tax = 7.5%

Amount of tax = 7.5% of total cost

Amount of tax = [tex]\frac{7.5}{100}*13.60[/tex]

Amount of tax = [tex]\frac{102}{100} = \$1.02[/tex]

The amount of tax for Veena's meal is $1.02

Picture 2: Christian reads 1/4 book every 2/3 week.  How many books does Christian read per week?

Given,

Books read every 2/3 weeks = 1/4 books

[tex]\frac{2}{3}\ weeks=\frac{1}{4}\ books\\[/tex]

For determining the number of books read per week, we will multiply both sides by [tex]\frac{3}{2}[/tex]

[tex]\frac{3}{2}*\frac{2}{3}\ week=\frac{1}{4}*\frac{3}{2}\ books\\\\1\ week = \frac{3}{8}\ books\\\\[/tex]

Christian reads [tex]\frac{3}{8}[/tex] books per week.

Picture 3: What percent is equivalent to [tex]\frac{4}{5}[/tex]?

We will multiply the given fraction with hundred for calculating the percentage.

[tex]\frac{4}{5}*100\\\\\frac{400}{5}\\\\80\%[/tex]

Therefore,

80% is equal to [tex]\frac{4}{5}[/tex].

Keywords: percentage, division

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Answer: 4x-6y=5

Step-by-step explanation: Using the formula, Ax+By=C, write the equation in standard form.

Hope this helps you out! ☺

The equation 4(x-2) = 3(2y-1) can be converted into standard form by first expanding the equation and then rearranging it. The equation in standard form is 4x - 6y = -5.

To convert the equation 4(x-2) = 3(2y-1) into standard form, we first expand both sides of the equation. This results in 4x - 8 = 6y - 3. We can then rearrange the equation to bring all variables to one side which yields 4x - 6y = -8 + 3 or 4x - 6y = -5.

However, in standard form, the coefficients of x and y should be integer and the coefficient of x should be positive. Additionally, the constant should be on the right side of the equation. Therefore, we multiply the whole equation by -1 to get -4x + 6y = 5. Multiplying again by -1 to make the coefficient of x positive, we get 4x - 6y = -5 which is the standard form of the given equation.

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with an expression like 3x6 you can separate parts of the expression using parentheses like: 3(2+4)

you can find ways to separate a variable (like 6) into a sum of two addends

ex 1+5

0+6

3+3

so a distributive version of 3x6 is 3(2+4) = (3x2) + (3x4)

Answer:

440 pounds

Step-by-step explanation:

Ratio is basically "parts".

We have ratio of 4:3:4, that is a total of 4 + 3 + 4 = 11 parts

The apple is 4 parts and total amount is 160 pounds. So each "part" is:

160/4 = 40 pounds

The total pounds of all 3 fruits is 11 parts * 40 pounds per part = 11 * 40 = 440 pounds

hence,

Truckload of fruits weigh at 440 pounds

Answer:-18

Step-by-step explanation: if f(x)= -9x

And x =2

-9(2)

= -18

Answer:

f(-2)=-18

Step-by-step explanation:

given f(x)=9x...........(1)

put x=-2 in equation (1)

f(-2)=[tex]9\times(-2)[/tex]

f(-2)=-18 answer

Answer:

t = 3h

Step-by-step explanation:

Given

h = [tex]\frac{1}{3}[/tex] t

Multiply both sides by 3 to clear the fraction

3h = t

Answer:

The length of side j is 11.85cm

Step-by-step explanation:

Given that

In triangle JKL,

[tex]\angle k=15[/tex]

[tex]\angle l=41[/tex]

Side k=LJ=3.7cm

To find side j=KL:

By using sine rule,

We can write as

[tex]\frac{SinK}{LJ} = \frac{SinL}{JK} = \frac{SinJ}{KL} \\\frac{Sin15}{3.7} = \frac{Sin41}{JK} = \frac{SinJ}{KL}[/tex]

Using property of triangle,

[tex]\angle k+\angle l+\angle j=180[/tex]

[tex]15+41+\angle j=180[/tex]

[tex]\angle j=124[/tex]

[tex]\frac{Sin15}{3.7} = \frac{Sin41}{JK} = \frac{Sin124}{KL}\\\frac{Sin15}{3.7} = \frac{Sin124}{KL}\\KL=3.7\frac{Sin124}{Sin15}\\KL=3.7\frac{0.8290}{0.2588}\\KL=11.85cm[/tex]

Thus,

The length of side j is 11.85cm

Answer: 11.9

Step-by-step explanation:

nearest 10th you have to round it

Answer:

X=20

you subtract 15 from 75 to get 60 then divide 60 by 3 to get 20

Answer:

11

Step-by-step explanation:

- 7 + 8 = 11 and the absolute value of 11 is 11

Answer:

  d)  1/6 + (-3/8) + 1/2

Step-by-step explanation:

For equivalence, the sign of each term must match the original. Here's how the answer choices stack up:

  a) wrong sign for -3/8

  b) wrong sign for -3/8 and for 1/2

  c) wrong sign for 1/2

  d) correct choice

Final answer:

Option (c) 1/6 + (-3/8) + (-1/2) is equivalent to the original expression 1/6 - 3/8 + 1/2 because it accurately reflects the original values and operations without any alterations.

Explanation:

The student's question asks to find an expression equivalent to the arithmetic operation 1/6 - 3/8 + 1/2. To find the equivalent expression, we should look for an option that represents the same operation without any alteration to the values or their signs.

Upon review, option (c) 1/6 + (-3/8) + (-1/2) is the correct equivalent expression because it maintains the original values and their associated signs. The negative signs in front of the fractions in this option simply denote subtraction, which matches the original expression given.

The use of parentheses in the alternative expression is typical in algebra to emphasize operations, but it does not change the value of the expression. Thus, the correct option is c.

Answer:

The answer is [tex]r=\frac{3}{2}\ cm.[/tex]

Step-by-step explanation:

Given:

V= πr²h.

V = 81 cm3,

π = 4 and

h = 9cm​.

Now, making r the subject of the formula using the result from the above, find r.

So, to get the value of r:

[tex]V=\pi r^2h[/tex]

[tex]81=4\times r^2\times 9[/tex]

[tex]81=36r^2[/tex]

Dividing both sides by 36 we get:

[tex]\frac{81}{36} =r^2[/tex]

Using square root on both sides we get:

[tex]\frac{9}{6} =r[/tex]

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

[tex]r=\frac{3}{2}.[/tex]

Therefore, the answer is [tex]r=\frac{3}{2}\ cm.[/tex]

Answer:

[tex]\large\boxed{x=\dfrac{5\pi}{4}\ \vee\ x=\dfrac{7\pi}{4}}[/tex]

Step-by-step explanation:

The first step in attachment.

[tex]\sin(x)=-\dfrac{\sqrt2}{2}\to x=-\dfrac{\pi}{4}+2k\pi\ \vee\ x=\dfrac{5\pi}{4}+2k\pi\\\\x\in[0,\ 2\pi)\\\\\text{Therefore}\\\\x=-\dfrac{\pi}{4}+2\pi=\dfrac{7\pi}{4}\ \vee\ x=\dfrac{5\pi}{4}[/tex]

Answer:

see explanation

Step-by-step explanation:

(1)

Given the perimeter then the third side is the perimeter subtract the sum of the 2 given sides, that is

third side

= 4x + 3y - (x - y + x + y)

= 4x + 3y - 2x ← collect like terms

= 2x + 3y

(2)

The area (A) of a triangle is calculated as

A = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )

Here b = 2x + 6 and h = x - 2, thus

A = [tex]\frac{1}{2}[/tex](2x + 6)(x - 2) ← expand factors using FOIL

   = [tex]\frac{1}{2}[/tex](2x² + 2x - 12) ← distribute

   = x² + x - 6 ← in standard form

Answer:

-0.42

Step-by-step explanation:

To match the world record, the runner needs a time difference for the fourth lap that brings the total time difference from all laps to zero. This time difference is calculated based on the sum of time differences of the first three laps.

This question is asking about the time difference that the runner needs for the fourth lap in order to match the world record.

Assuming that the total time difference after the first three laps is provided in the table, what you'll do is add these three time differences to get the total difference for the first three laps.

Let's say, for instance, the total after three laps is +15 seconds. Since a positive number means the runner is behind the world record holder's time, we want the fourth lap to compensate for that and bring the total time difference to zero to match the world record. Therefore, the runner will need a -15 seconds time difference on the fourth lap.

Remember that a negative number means the runner ran the lap faster than the world record holder.

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Answer:

(1/4) ^3 = 0.0833333333

Answer: OPTION C

Step-by-step explanation:

There are some transformations for a function f(x). Some of them are shown below:

1. If [tex]f(x)+k[/tex], the function is shifted up "k" units.

2. If [tex]f(x)-k[/tex], the function is shifted down "k" units.

3. If [tex]f(x+k)[/tex], the function is shifted left "k" units.

4. If [tex]f(x-k)[/tex], the function is shifted right "k" units.

In this case you know that the function "g" is the transformation of the function "f".

Observe that the function "f" intersects the y-axis at:

[tex]y=2[/tex]

And the function "g" intersects the y-axis at:

[tex]y=-2[/tex]

Therefore, since both functions are 4 units apart, you can conclude that the function "f" was shifted down 4 units to get the function "g".

Then, the rule that shows that transformation is:

[tex]g(x)=f(x)-4[/tex]

Answer:

(Q.1) No solution

(Q.2) True

(Q.3)  x = 4 - 2y

(Q.4) True

========================================

Step-by-step explanation:

(Q.1) As shown in the first attached figure.

By graphing.   x + 2y = 8   &   x + 2y = -4

The two lines are parallel, there is no intersection points between the lines.

So, there is no solution to the system of equations.

Also, we should note the parallel lines have the same slope

to find it make the equation similar to y = mx + c where m is the slope

at this situation m = -1/2

===================================================

(Q.2) As shown in the second attached figure.

By graphing the system of inequalities  y> -3x+2  &  y<2x+1

The Shaded area represents the solution of the system of inequalities

And the point (4,2) is inside the shaded area

So, The ordered pair (4,2) is a solution to the system of inequalities.

====================================================

(Q.3) solving the system { x+2y=4  &  2x+2y=6 } by substitution

From the first equation x + 2y = 4

we will find x in terms of y then plug it into the second equation

So, x + 2y = 4 ⇒  x = 4 - 2y

=====================================================

(Q.4) As shown in the third attached figure.

By graphing.   2x + 4y = 8  &  x + 2y = 6

The two lines are parallel, there is no intersection points between the lines.

So, there is no solution to the system of equations.

Also, we should note the parallel lines have the same slope

to find it make the equation similar to y = mx + c where m is the slope

at this situation m = -1/2

Answer:

Hypothesis is: Intersection happens at a point

Step-by-step explanation:

A hypothesis in science is a suggested explanation of something that has a consequence or leads to an occurrence.  Usually it will be written in the form of an "if and then" statement.

Such statement explains what would occur, or follow if the possibility enunciated in the "if" part of the statement happens.

In this case the hypothesis is that if there is intersection of lines, it has to occur at a point. Therefore the closest to that statement among the options given in the problem is the last one: "Intersection happens at a point"

Answer:

Two Line Intersect

Step-by-step explanation:

I got it right on the test :)

Answer:

I thinks its r = 11

Step-by-step explanation:

So you just need to take the number to the r and multipliy it by r So,

9x2=18

then minus it by the other number which would Be 7 so.

18-7=11

Answer:

11

Step-by-step explanation:

(-9 times 2) - 7

18 - 7

11

Answer:

36

Step-by-step explanation:

since a fair die has 6 sides (i.e 6 possible outcomes),

P (rolls a 4 on 1 roll) = 1/6

hence if he rolls the die 216 times, we would expect to roll a 4 for 1/6 of the time. I.e.

expected number of times to roll a 4

= (1/6) x 216 = 36 times.

Answer:

Answer:

36

Step-by-step explanation:

since a fair die has 6 sides (i.e 6 possible outcomes),

P (rolls a 4 on 1 roll) = 1/6

hence if he rolls the die 216 times, we would expect to roll a 4 for 1/6 of the time. I.e.

expected number of times to roll a 4

= (1/6) x 216 = 36 times.

Step-by-step explanation:

Option A

The equation [tex]4x^2 - 3x + 1 = 0[/tex] has two imaginary solutions

Solution:

Given that we have to determine the type and number of solutions of given quadratic equation

[tex]4x^2 - 3x + 1 = 0[/tex]

[tex]\text {For a quadratic equation } a x^{2}+b x+c=0, \text { where } a \neq 0\\\\x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}[/tex]

In a quadratic equation, the discriminant helps tell you the number of real solutions to a quadratic equation

In the case of a quadratic equation [tex]ax^2 + bx + c = 0[/tex], the discriminant is [tex]b^2 -4ac[/tex]

[tex]\text{If } b^{2}-4 a c=0 ;$ then the given quadratic equation has one real root\\\\If b^{2}-4 a c>0,$ then the given quadratic equation has two real roots[/tex]

If [tex]b^2-4ac<0[/tex], then the given quadratic equation has two imaginal roots which are complex conjugates

Given quadratic equation is:

[tex]4x^2 - 3x + 1 = 0[/tex]

Here a = 4 and b = -3 and c = 1

The discriminant is given as:

[tex]b^2 - 4ac = (-3)^2 - 4(4)(1) = 9 - 16 = -7\\\\b^2 - 4ac = -7\\\\b^2-4ac < 0[/tex]

Therefore the given equation has two imaginary solutions

Answer:

two imaginary solutions

Step-by-step explanation:

Answer:

Arc VU = 44°

Step-by-step explanation:

Given:

Arc SV means ∠SOV = 120°

Arc VU means ∠VOU = ?

We know that, from central angle theorem, central angle made by arc is twice the angle made the same arc at the circumference.

∴ ∠SOU = 2 × ∠STU

⇒ ∠SOU = 2(82°)

⇒ ∠SOU = 164°

Now, from angle addition theorem,

∠SOU = ∠SOV + ∠VOU

⇒ 164° = 120° + ∠VOU

⇒ 164° - 120° = ∠VOU

⇒ ∠VOU = 44°

Therefore, the measure of the arc VU is 44°.

Answer:

(12-7x)

Step-by-step explanation:

144 − 49x²

by observation, we can see that 144 = 12² and 49 = 7²

hence we can rewrite the equation

144 − 49x²

= 12² - 7²x²

= 12² - (7x)²

recall that the expression x² - y² = (x+y)(x-y)

hence,

12² - (7x)²

= (12 + 7x)(12-7x)

(12-7x) appears in the expression above, hence 12 -7x is a factor

Answer:

Answer is C

Step-by-step explanation: