I really need help with number 55

Answer:

4/5

Step-by-step explanation:

The prime factorization of 24 is 2*2*2*3.

There prime factorization of 30 is 2*3*5.

They have 2*3 in common.

2*3=6.

So we can divide numerator (top) and denominator (bottom) by 6 and this will reduce the fraction into simplest form.

[tex]\frac{24}{30}=\frac{24 \div 6}{30 \div 6}=\frac{4}{5}[/tex]

The simplified version of the fraction 24/30 is 4/5

Fraction is a mathematical number by which we can describe a part of a whole item.

A fraction has two parts, the top part is called numerator & the bottom part is called denominator.

Example : [tex]\frac{5}{7}[/tex] , where 5 is the numerator & 7 is the denominator.

The given fraction is 24/30

The prime factorisation of 24 gives 2×2×2×3 , i.e. 2×2×(2×3)

The prime factorisation of 30 gives 2×3×5 , i.e. 5×(2×3)

Common in both 24 & 30 is 2×3, i.e. 6

So, we have to divide numerator & denominator of the given fraction by 6 to get the simplified form.

Hence, 24/30 = (24/6)/(30/6) = 4/5

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Answer:

A) 7.07

Step-by-step explanation:

[tex]The \: distance \: formula = \sqrt{(x_2 - x_1) ^{2} + (y_2 - y_1) ^{2} } [/tex]

[tex]P_1(-3, -2) \: \: \: \: \: \: \: \: \: \: \: P_2(2, 3)[/tex]

[tex]d = \sqrt{ {(2 - ( - 3))}^{2} + {(3 - ( - 2))}^{2} } \\ d = \sqrt{ {(2 + 3)}^{2} + {(3 + 2)}^{2} } \\ d = \sqrt{ {5}^{2} + {5}^{2} } \\ d = \sqrt{25 + 25} \\ d = \sqrt{25(1 + 1)} \\ d = \sqrt{25(2)} \\ d = \sqrt{25} \times \sqrt{2} \\ d = 5 \sqrt{2} \\d = 7.07106781187 \\ d = 7.07[/tex]

Answer:    A. 7.07 units

Step-by-step explanation:

The distance between any two points (a,b) and (c,d) is given by :-

[tex]D=\sqrt{(d-b)^2+(c-a)^2}[/tex]

From the given picture , we can see that the line is passing through (2,3) and (-3,-2).

The distance between (2,3) and (-3,-2) is given by :-

[tex]D=\sqrt{(-2-3)^2+(-3-2)^2}\\\\\Rightarrow\ D=\sqrt{(-5)^2+(-5)^2}\\\\\Rightarrow\ D=\sqrt{25+25}=\sqrt{50}\\\\\Rightarrow\ D=7.07106781187\approx7.07[/tex]

Hence, the distance between the two endpoints = 7.07 units

Answer:

Option B.

Step-by-step explanation:

We have the following polynomial: -10x^2+12x-9=0

Multiplying by -1:

10x^2-12x+9=0

Using the quadratic formula, we find that the roots are:

0.6 ± 3√(6)/10i

Therefore, the correct answer is B.

Answer:

77.3 to the nearest tenth.

Step-by-step explanation:

The total of the scores on the set of 27 tests

= 78*27 = 2106.

After  2 more had joined the total score is 2106 + 69 + 66

= 2241.

So the new mean score = 2241 / 29

= 77.3.

Answer:

77.3

Step-by-step explanation:

Recall that the arithmetic mean is found as follows:

             sum of all data

a. m. = ---------------------------

             number of data

                                                                              sum

The mean score of 27 test results is thus 78 = --------

                                                                                27

Note that we can find the sum of all 27 of the original scores by multiplying 78 by 27:  2106.

Now we include two more scores.  Instead of the original sum, 2106, we have

                   2106 + 69 + 66

a. mean = ---------------------------

                              29

which comes out to 2241/29 = 77.3

Answer:

r ≤ 29, r-5, The sale price can be compared with the regular price, r-5 ≤ 24

Step-by-step explanation:

Amount to spend = $24

Regular price = r

Sale = $5

Sale Price = r-5

The regular price will be at most $5 more than the amount Roopesh has to spend.

The sale price will be $24 or less than that for Roopesh to afford.

Inequality for regular price :

r-5 ≤ 24

r ≤ 29

Therefore, the product Roopesh can afford is $29 or less than that.

What is the unknown? r ≤ 29

Which expression can represent the sale price? Sale price = r-5 (mentioned above)

Which comparison could be used? The sale price can be compared with the regular price

Which inequality represents the situation? r-5 ≤ 24

!!

Answer:

A.  square pyramid

Step-by-step explanation:

A square pyramid has a triangular cross section when the cross section is taken perpendicular to the base.

The solid that has a triangular cross section when the cross section is taken perpendicular to the base is a square pyramid. A cross section through the sloping triangular faces of the square pyramid will reveal a triangular shape.

To answer this, consider the properties of each option:

A square pyramid has a square base and triangular faces that meet at a common point above the base, resembling a series of tetrahedra joined together. When a cross section is taken perpendicular to its square base, it would indeed reveal a triangle shape as it would pass through these sloping triangular faces.

A cube would not result in a triangular cross section since it has all square faces.

A hexagonal prism has a hexagon as its base, and taking a cross section perpendicular to this base would yield a hexagon, not a triangle.

Similarly, a rectangular prism would result in a rectangle or square from such a cross section.

Therefore, the correct answer is a square pyramid.

Answer:

Option C. [tex]ln(\frac{2x^{3}}{3y})[/tex]

Step-by-step explanation:

The given logarithmic expression is:

[tex]ln(2x)+2ln(x)-ln(3y)[/tex]

Using the power rule of logarithms: [tex]blog(a)=log(b)^{a}[/tex], the above expression can be written as:

[tex]ln(2x)+ln(x)^{2}-ln(3y)[/tex]

Using the product rule of logarithms: [tex]log(a)+log(b) =log(ab)[/tex], the above expression can be simplified further to:

[tex]ln(2x \times x^{2}) - ln(3y)\\\\=ln(2x^{3})- ln(3y)[/tex]

Using the quotient rule of logarithms: [tex]log(a)-log(b)=log(\frac{a}{b})[/tex], the above expression can be written as:

[tex]ln(\frac{2x^{3}}{3y})[/tex]

Hence option C gives the correct simplified answer.

Answer:

The correct option is C

Step-by-step explanation:

We have given the roots -6, 1 and 4.

Write down the roots:

x= -6 , x=1 , x=4

Rewrite the roots as an expression:

x+6=0

x-1=0

x-4=0

Now we have the following expressions:

=(x+6)(x-1)(x-4)

Now Multiply the terms:

=(x²-x+6x-6)(x-4)

=(x²+5x-6)(x-4)

=x(x²+5x-6) -4(x²+5x-6)

=x³+5x²-6x-4x²-20x+24

Solve the like terms:

=x³+x²-26x+24

Thus the correct option is C....

Answer:

aaaaaaaa top one wrong

Step-by-step explanation:

Answer:

17x

Step-by-step explanation:

combine like terms,you would end up with 20x because if you combine 3x and 2x=5 then 5x+15x is 20x.then 20x-3 is 17x.

Answer:

50%

Step-by-step explanation:

There are 10 marbles total in the bag, and 5 of them are red. So, to find the probability of not drawing a red marble, you need to count how many marbles are not red.

There are 3 green marbles and 2 blue marbles so there are 5 marbles that are not red.

So you need to write this as a fraction so 5/10 of the marbles are not red.

None of the answer choices that are fractions match 5/10 or 1/2, so you need to convert 5/10 to a percent.

To convert it as a percent you divide 5 by 10, which is .50

Then you move the decimal point two places to the right so its 50%

So there is a 50% percent chance of not drawing a red marble.

the standard form is g(x)=x^2+2x-1

Answer:

- 3

Step-by-step explanation -

- 5x from both sides -> 3 = -1x .

then divide each side by - 1 -> -3 = x

Answer:

-3

Step-by-step explanation:

5x+3=4x

Subtract 5x on both sides.

5x+3-5x=4x-5x

Simplify.

3=-1x

3=-x

Take opposite of both sides.

-3=x

x=-3

Answer:

Vertical angles

Step-by-step explanation:

Vertical angles are the angles that happen opposite to each other in two intersecting lines. (These angles are congruent.)

Supplementary means that the two angles add up to be 180.

Complementary means the two angles add up to 90.

Linear pair are supplementary adjacent angles. (Adjacent means next to sharing the same vertex and a common ray.)

The given statement is the definition of vertical angles.

Vertical angles are either of two angles lying on opposite sides of two intersecting lines.

Supplementary angles are two angles whose sum is 180 degrees.

Complementary angles are two angles whose sum is 90 degrees.

Linear pair of angles are formed when two lines intersect each other at a single point.

According to the definition, these are vertical angles, which  two angles lying on opposite sides of two intersecting lines.

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Replace n in the equation with each given value and solve for m.

You are given n = {-2, 1, 4}

When n = -2:

3m = -2-7

3m = -9

m = -9/3

m = -3

When n = 1:

3m = 1-7

3m = -6

m = -6 /3

m=-2

When n = 4:

3m = 4-7

3m = -3

m = -3/3

m = -1

m = {-3, -2, -1}

Answer:

4/15.

Step-by-step explanation:

In probability, there are two types of events: the ones that are not related to each other and the ones that are related to each other. The former types of events are called independent events. In such cases, since the occurrence of one event is not related to and does not affect the other event, therefore, the probabilities of both events can be multiplied if they occur together. It is given that:

P(Q) = 7/15.

P(R) = 4/7.

P(Q and R) = P(Q)*P(R) = 7/15 * 4/7 = 4/15.

Therefore, the probability is 4/15!!!

Answer:

s is neding some more in fo

Step-by-step explanation:

Answer:

x³ - 3x² - 13x + 15

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor, that is

x(x² - 6x + 5) + 3(x² - 6x + 5) ← distribute both parenthesis

= x³ - 6x² + 5x + 3x² - 18x + 15 ← collect like terms

= x³ - 3x² - 13x + 15

Answer:

The GCF of 42 and 60 is 6

Step-by-step explanation:

42: 1,2,3,6,7,14,21,42

60: 1,2,3,4,5,6,10,12,15,20,30,60

Answer:

6

Step-by-step explanation:

Factors of 42 = 1, 2, 3, 6, 7, 14, 21 and 42

Factors of 60 = 1 , 2 , 3 , 4 , 5 , 6 , 10 , 12 , 15 , 20 , 30 and 60

The highest factor which comes in both 42 and 60 is 6

Answer:

7 days

Step-by-step explanation:

Five men do 200 yards in one day

One man does 200/5 = 40 yards in 1 day.

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

Now you want to know something about 8 men

8 men can do 40 * 8 = 320 yards in 1 day

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

2240 yards / 320 yards = 7 days

Answer:

Step-by-step explanation:

First we will solve the Left Hand Side:

(x-2)(-5x²+x)

Multiply the terms:

= -5x³+x²+10x²-2x

Solve the like terms

= -5x³+11x²-2x

Now we will solve the Right Hand Side:

(x)(-5x²)+(x)(x)+(-2)(-5x²)+(-2)(x)

Multiply the terms:

-5x³+x²+10x²-2x

Solve the like terms:

-5x³+11x²-2x

Hence it is proved that L.H.S = R.H.S....

Answer:

12 km

Step-by-step explanation:

So the situation is:

8 km/h for X hours

6 km/h for y hours

X * 8 + y * 6 = 26.4

and X + Y = 3.9 hours

Since 234/60 = 3.9 hours

You could write that X = 3.9 - Y

(3.9-Y) * 8 + y * 6 = 26.4

31.2 -8Y +6Y = 26.4

-2Y = -4.8

Y = 2.4 hours

X = 3.9-2.4 = 1.5 hours

So 1.5 * 8 = 12 km

Answer:

AB = 12km

Step-by-step explanation:

From the question we can get the following information,

The whole trip is 26.4 km and 3.9 hours ([tex]\frac{234}{60}[/tex]), and we can form the following two equations.

[tex]x + y = 3.9[/tex]   and [tex](x*8km/h) + (y*6km/h) = 26.4km[/tex]

Where X is distance between A and B, and Y is distance between B and C. We can solve the first equation for X and plug X into the second equation.

[tex]x = 3.9 - y[/tex]  ........   and we can plug it into the the second equation and solve for y

[tex]((3.9-y)*8)+(6y) = 26.4[/tex]

[tex](31.2-8y)+6y = 26.4[/tex]

[tex]31.2-2y = 26.4[/tex]

[tex]-2y = -4.8[/tex]

[tex]y = 2.4[/tex]

Now we can plug in y to the first equation to solve for x

[tex]x = 3.9-2.4[/tex]

[tex]x = 1.5[/tex]

Finally, we can multiplay 8km/h by 1.5 hours to find the distance from A to B

[tex]AB = 8km/h * 1.5h[/tex]

[tex]AB = 12km[/tex]

Find the total number of groups by subtracting the solo acts from the total acts:

24 - 8 = 16 group acts.

Now divide the number of group acts by the total number of acts:

16 /24 = =0.666

Multiply by 100:

0.666 x 100 = 66.6% = 66 2/3%

The answer is I.

Answer:

B and E

Step-by-step explanation:

The remote interior angles to ∠1 are the 2 opposite interior angles, that is

∠5 and ∠6

Answer:

a) The length of the mid-segment  is 6.25 cm

b) The length of AT = 33 units

c) The value of x is 3

Step-by-step explanation:

a)

* Lets explain the mid-segment of a triangle

- A mid-segment of a triangle is a segment connecting the midpoints

 of two sides of a triangle

- This segment has two special properties

# It is parallel to the third side

# The length of the mid-segment is half the length of the third side

∵ The triangle is equilateral triangle

∴ All sides are equal in length

∵ the side lengths = 12.5 cm

∵ The length of the mid-segment = 1/2 the length of the third side

∴ The length of the mid-segment = 1/2 × 12.5 = 6.25 cm

* The length of the mid-segment  is 6.25 cm

b)

∵ UT is a perpendicular bisector of AB

∵ T lies on AB

∴ T is the mid-point of AB

∵ AT = BT

∵ AT = 3x + 6

∵ BT = 42 - x

- Equate AT and BT

∴ 3x + 6 = 42 - x

- Add x to both sides

∴ 4x + 6 = 42

- Subtract 6 from both sides

∴ 4x = 36

- Divide both sides by 4

∴ x = 9

∵ AT = 3x + 6

- Substitute x by 9

∴ AT = 3(9) + 6 = 27 + 6 = 33

* The length of AT = 33 units

c)

- In Δ ABC

∵ AB = BC

∴ Δ ABC is an isosceles triangle

∵ BD bisects angle ABC

- In the isosceles Δ the bisector of the vertex angle bisects the base

 of the triangle which is opposite to the vertex angle

∵ AC is the opposite side of the vertex B

∴ BD bisects the side AC at D

∴ AD = CD

∵ AD = 5x + 10

∵ CD = 28 - x

∴ 5x + 10 = 28 - x

- Add x to both sides

∴ 6x + 10 = 28

- Subtract 10 from both sides

∴ 6x = 18

- Divide both sides by 6

∴ x = 3

* The value of x is 3

The true statements are:

a) The length of the midsegment  is 6.25 cm

b) The length of AT = 33 units

c) The value of x is 3

The length of the midsegment

The length of the triangle is given as

L =12.5cm

So, the length of the midsegment is:

M = 0.5 * L

This gives

M = 0.5 * 12.5 cm

M = 6.25 cm

Hence, the length of the midsegment  is 6.25 cm

The length of AT

The given parameters are:

AT = 3x + 6 and TB = 42 - x.

Since point T is the perpendicular bisector, then we have:

3x + 6 = 42 - x

Collect like terms

3x +x = -6 + 42

Evaluate

4x = 36

Divide both sides by 4

x = 19

Recall that:

AT = 3x + 6

So, we have:

At = 3 * 9  + 6

At = 33

Hence. the length of AT = 33 units

The value of x

We have:

AD = 5x + 10

DC = 28 - x

So, we have:

5x + 10 =28 - x

Collect like terms

5x + x = 28 -10

6x =18

Divide

x =3

Hence, the value of x is 3

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Answer:

c=3t is the equation

18 cubic yards of concrete is what we need for a 6 inch thick bridge.

Step-by-step explanation:

If something directly varies, that means there is a constant, k, such that when you multiply it to one variable you always get the other variable.

That is for this particular problem we have c=kt where c is cubic yards and t is thickness in inches.

So we are given from the first sentence: 12 cubic yards and 4 inches thick which means we have:

12=k(4)

Divide both sides by 4:

12/4=k

Simplify:

3=k

So the equation is c=3t for any point (c,t) in this relation.

So we want to know many cubic yards of concrete (we want to know (c) so that Dru can build a 6 inch (t) thick bridge.

c=3(6)

c=18

18 cubic yards

Answer:

78

Step-by-step explanation:

Multiply f(x) and g(x) then evaluate for x = - 5

f(x) × g(x)

= (- 2x - 7)(- 4x + 6) ← substitute x = - 5 into the expression

= (10 - 7)(20 + 6)

= 3 × 26

= 78

For this case we have the following functions:

[tex]f (x) = - 2x-7\\g (x) = - 4x + 6[/tex]

We must find [tex](f * g) (x).[/tex] By definition we have to:

[tex](f * g) (x) = f (x) * g (x)[/tex]

So:

[tex](f * g) (x) = (- 2x-7) (- 4x + 6)[/tex]

We apply distributive property keeping in mind that:

[tex]- * - = +\\- * + = -\\(f * g) (x) = 8x ^ 2-12x + 28x-42\\(f * g) (x) = 8x ^ 2 + 16x-42[/tex]

We evaluate in [tex]x = -5[/tex]:

[tex](f * g) (- 5) = 8 (-5) ^ 2 + 16 (-5) -42\\(f * g) (- 5) = 8 * 25-80-42\\(f * g) (- 5) = 200-80-42\\(f * g) (- 5) = 78[/tex]

Answer:

[tex](f * g) (- 5) = 78[/tex]

Answer:

The Answer is D

Step-by-step explanation:

If the Exponent is 1 or just x then it is linear.

* If the Exponent has and x, then this graph is exponential because anything to the power of X is exponential.

1/2(1/2)=0.25^x

Answer:

The Answer is C

Step-by-step explanation:

Just took ed2020 test

[tex]\bf (\stackrel{x_1}{x}~,~\stackrel{y_1}{-9})\qquad (\stackrel{x_2}{0}~,~\stackrel{y_2}{1}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{1-(-9)}{0-x}=\stackrel{\stackrel{slope}{\downarrow }}{-4}\implies \cfrac{1+9}{-x}=-4 \\\\\\ \cfrac{10}{-x}=-4\implies 10=4x\implies \cfrac{10}{4}=x\implies \cfrac{5}{2}=x[/tex]

Answer: The last one

Step-by-step explanation:

I think this because the graph starts from H the number of hours studied and when u add the numbers and divide them up which gives you the equation 65 + 50 . Any questions please text me. Have a nice day.

Answer:

113ºF

Step-by-step explanation:

Remember that exist a conversion rule that states:

[tex]F=\frac{9*C}{5} +32[/tex]

using it we have the following expression:

[tex]1.8*(45)+32=113[/tex]

Answer:

A. True.

Step-by-step explanation:

For example,  the results of throwing a fair dice. The variable can only be 1,2,3,4,5,6.

Answer: True

A P E X

A discrete randem variable is a variable that is randomly chosen and can only take on certain values.