Which of the following statements is true concerning ABC below?

A. B is the largest angle.
B. B is the smallest angle
C. A is the largest angle
D. A is the smallest angle

Which Of The Following Statements Is True Concerning ABC Below?A. B Is The Largest Angle.B. B Is The

Answers

Answer 1

Answer:

D. A is the smallest angle

Step-by-step explanation:

Angle A's lines are closest together

Answer 2

Answer:

D. A is the smallest angle

Step-by-step explanation:

To answer this question properly, we need to remember that the sum of the three angles, in a triangle, must result in 180º. Besides, each leg of this triangle is in the opposite direction to the angle of its vertex.

Finally, with the help of a compass we can demonstrate it even better, but in short,  the larger the leg the larger the angle. So, ∠A is the smallest angle since a measures 7 units, then comes ∠B for b measures 10 units and ∠C as the largest angle for c measures 12 units.


Related Questions

Boat Speed Callie took 20 min to drive her boat upstream to water-ski at he
ite spot. Coming back later in the day, at the same boat speed, took her 15 min.
the curent in that part of the river is 5 km per hr, what was her boat speed?

Answers

The speed of the boat was 35 kilometers per hour.

What is the distance?

Distance is defined as the product of speed and time.

What are Arithmetic operations?

Arithmetic operations can also be specified by the subtract, divide, and multiply built-in functions. The operator that performs the arithmetic operations are called arithmetic operators.

- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.

for example 4 -2 = 2

* Multiplication operation: Multiplies values on either side of the operator

For example 4*2 = 8

Let us consider the speed of the boat is x km/h.

D = xt

Given that the current in that part of the river is 5 km per hr

Distance upstream  = (x-5) km

Distance downstream = (x+5) km/h

The distance is the same up and downstream

So (x-5)(1/3) =(x+5)(1/4)

Multiplying thru by 12

⇒ 4(x-5) =3(x+5)

⇒ 4x - 20 =3x + 15

Rearrange the likewise terms and apply the arithmetic operations,

⇒ 4x - 20 =3x + 15

⇒ 4x - 3x = 20 + 15

⇒ x = 35 kmph

Hence, the speed of the boat was 35 kilometers per hour.

Learn more about the distance here:

https://brainly.com/question/13269893

#SPJ2

which expression is equivalent to -51-(-60)
-51 + 60
51 - 60
-60 + (-52)
60 + 51

Answers

Answer:-51+60

Step-by-step explanation: go into debt lose more money go farther into debt

-51 + 60
Since the original equation is minus a negative you can turn it into a positive and still get the same answer.

Write an expression to describe the relationship in each table 10,12,15. 7,9,12​

Answers

Final answer:

The relationship in each table is that each number is obtained by adding 2 to the previous number.

Explanation:

The relationship between the numbers in the first table is that each number is obtained by adding 2 to the previous number. The expression to describe this relationship is n + 2, where n is any given number in the table.

The relationship between the numbers in the second table is that each number is obtained by adding 2 to the previous number. The expression to describe this relationship is n + 2, where n is any given number in the table.

Learn more about Relationship in tables here:

https://brainly.com/question/32080743

#SPJ2

Help please I would appreciate it

Answers

Answer:

SORRY DONT KNOW

Step-by-step explanation:

the measure of angle ∠21 must be 55 degrees for line b to be parallel to line a.

In order for line b to be parallel to line a, the measure of angle ∠21  must be 125 degrees. Corresponding angles are angles that are in the same position relative to two intersecting lines. Since lines a and b are parallel, we know that corresponding angles ∠1 and ∠21 are congruent.  Therefore, we can set up the following equation to find the measure of ∠21:

∠1 + ∠21 = 180° (because they are supplementary angles)

Substituting 125° for the measure of ∠1, we get:

125° + ∠21 = 180°

Solving for ∠21, we get:

∠21 = 180° - 125°

∠21 = 55°

I'LL GIVE BRAINLIEST HELP
~20 pts~
Jim is paid for overtime when he works more than 40 hours per week.
a. Write an expression for the number of hours he works overtime when he works h hours.
b. Find the number of hours Jim works overtime when he works 40, 44, 48, and 52 hours.

Answers

Hey!

------------------------------------------

Part A:

h - 40

------------------------------------------

Part B:

40 - 40 = 0 overtime hours.

44 - 40 = 4 overtime hours.

48 - 40 = 8 overtime hours.

52 - 40 = 12 overtime hours.

------------------------------------------

Hope This Helped! Good Luck!

Answer:

The required expression is [tex] O=h - 40[/tex].

For 40 hrs overtime is 0 hrs.

For 44 hrs overtime is 4 hrs.

For 48 hrs overtime is 8 hrs.

For 52 hrs overtime is 12 hrs.

Step-by-step explanation:

Consider the provided information.

Part (A)

It is given that Jim is paid for overtime when he works more than 40 hours per week.

Let Jim works for h hrs and O represents the overtime, Then overtime can be represented as:

O = h - 40

The expression for the number of hours he works overtime when he works h hours is:

[tex] O=h - 40[/tex]

Part (B) Find the number of hours Jim works overtime when he works 40, 44, 48, and 52 hours.

Substitute h=40 in the obtained expression.

[tex] O=40 - 40[/tex]

[tex] O=0[/tex]

Hence, for 40 hrs overtime is 0 hrs.

Substitute h=44 in obtained expression.

[tex] O=44 - 40[/tex]

[tex] O=4[/tex]

Hence, for 44 hrs overtime is 4 hrs.

Substitute h=48 in obtained expression.

[tex] O=48 - 40[/tex]

[tex] O=8[/tex]

Hence, for 48 hrs overtime is 8 hrs.

Substitute h=52 in obtained expression.

[tex] O=52 - 40[/tex]

[tex] O=12[/tex]

Hence, for 52 hrs overtime is 12 hrs.

What is the domain of the function graphed ? F(x)=√x+4
A. x≤-4
B. x≥0
C. x≥-4
D. x≥4

Answers

The answer is (c) I just take a test
Final answer:

The domain of the function F(x) = √(x+4) is all real numbers greater than or equal to -4, which corresponds to option C. x≥-4.

Explanation:

The student has asked about the domain of the function F(x) = √(x+4). To determine the domain of this function, we need to consider the values of x for which the expression under the square root, x+4, is non-negative, since the square root of a negative number is not defined in the set of real numbers.

The expression x+4 is non-negative when x ≥ -4. Therefore, any number greater than or equal to -4 is part of the domain of the function.

This means the correct answer to the question is C. x≥-4.

(01.04 LC)Solve (−5) ⋅ (−3). −15 −8 8 15

Answers

Answer:

Positive 15

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

need a answer
1*5-6+7(9x-7a)

Answers

Answer:

-1 + 63x - 49a

Step-by-step explanation:

Following order of operations rules:

1*5 = 5

Next, 5 - 6 = -1, and so we now have -1 + 7(9x - 7a).

Apply the distribution rule for multiplication next, obtaining -1 + 63x - 49a

four times the difference of b and six is equal to b squared

Answers

Answer:

4(b-6)=b^2

Step-by-step explanation:

The difference would mean that it is subtraction and you multiply that difference by 4 and set it equal to b squared

According to the statement, the given equation is  4(b - 6) = b², and the value of b is 2 + 4.472i and 2 - 4.472i.

To solve the equation given: 4(b - 6) = b², we need to first expand and simplify.

4b - 24 = b²

b² - 4b + 24 = 0

b = 2 + 4.472i and 2 - 4.472i.

What is standard form of 7x1+3x(1/10)+4x(1/100)

Answers

Answeuse a caculator then write it our

Step-by-step explanation:

The standard form of 7 x 1 + 3 x ( 1/10 ) + 4 x ( 1 / 1000 ) is 0.7304 x [tex]10^{1}[/tex].

Given,

7 x 1 + 3 x ( 1/10 ) + 4 x ( 1 / 1000 )

We need to write this large number in standard form.

What is a standard form?

A standard form is a way of expressing a large number as a decimal number between 0 and 1 (including 1) and multiplied by a power of 10.

We have,

7 x 1 + 3 x ( 1 / 10 ) + 4 x ( 1 / 1000 )

7 + 0.3 + 0.004

7.304

Since we need a decimal point between 0 and 1.

We will multiply 7.304 by 10 / 10.

so we have,

7.304 x 10 / 10

(7.304 / 10 ) x 10

0.7304 x 10

Remember that a number to the power 1 is the number itself.

[tex]10^{1} = 10[/tex]

We see that in 0.7304 x [tex]10^{1}[/tex],

0.7304 is a decimal point between o and 1 and we have a power of 10.

It satisfies the standard form of a number.

Thus the standard form of 7 x 1 + 3 x ( 1/10 ) + 4 x ( 1 / 1000 ) is

0.7304 x [tex]10^{1}[/tex].

Learn more about the standard form here:

https://brainly.com/question/13162978

#SPJ2

Solve for g: 5/8 = 12/g

Answers

Answer:

Step-by-step explanation:

[tex]\frac{5}{8} = \frac{12}{g}[/tex]

Multiplying both sides by [tex]g[/tex] gives us the following:

[tex]\frac{5g}{8} = 12[/tex]

Multiplying both sides by 8 gives us the following:

[tex]5g = 108[/tex]

Dividing both sides by 5 gives us the answer:

[tex]g = 21.6[/tex]

Hello.

To do this problem, cross multiply.

(8)(12)= 5g

96 = 5g

g = 96/5

g= 19.2

Hope that helped!

************************

Disclaimer:

Always double check your answer with a reliable source, as mistakes can be made.

4(-8x + 5) = -24x – 16

Answers

Answer:

x = 9/2

Step-by-step explanation:

Solve for x:

4 (5 - 8 x) = -24 x - 16

Expand out terms of the left hand side:

20 - 32 x = -24 x - 16

Add 24 x to both sides:

24 x - 32 x + 20 = (24 x - 24 x) - 16

24 x - 24 x = 0:

24 x - 32 x + 20 = -16

24 x - 32 x = -8 x:

-8 x + 20 = -16

Subtract 20 from both sides:

(20 - 20) - 8 x = -20 - 16

20 - 20 = 0:

-8 x = -20 - 16

-20 - 16 = -36:

-8 x = -36

Divide both sides of -8 x = -36 by -8:

(-8 x)/(-8) = (-36)/(-8)

(-8)/(-8) = 1:

x = (-36)/(-8)

The gcd of -36 and -8 is -4, so (-36)/(-8) = (-4×9)/(-4×2) = (-4)/(-4)×9/2 = 9/2:

Answer:  x = 9/2

Answer:

x = 9/2

Step-by-step explanation:

-32x+20=-24x-16

-32x+24x+20=-16

-8x=-16-20

-8x=-36

x=9/2

What’s the answer
To the problem it’s kinda hard

Answers

-4x=32

Solving for x:

x=(32)/(-4)

x=-8

PLEASEEEE HELP THANK YOU!!!

Answers

Answer:

- 4 < x ≤ 7

Step-by-step explanation:

Given

- 10 ≤ - 5x + 25 < 45 ( subtract 25 from all 3 intervals )

- 35 ≤ - 5x < 20

Divide all 3 intervals by - 5, reversing the inequality signs as a consequence.

7 ≥ x > - 4

Hence - 4 < x ≤ 7

What is the pattern for -5, 10, -15, 20, -25

Answers

Answer:

The number 5  multiplied by -1 then by 2 then by -3 then by 4....... (alternating positive and negative

Step-by-step explanation:

5*-1 = -5

5*2 = 10

5*-3= -15  

5*4= 20    

5*-5 = -25 ......

What is
110two
+ 111two=

Answers

Answer:

13

Step-by-step explanation:

110two

[tex]2 \times ( {1}^{2} ) + 2( {1}^{1} ) + 2 \times ( {0}^{0} ) \times ( {1}^{2} ) + 2 \times ( {1}^{1} ) \times ( {1}^{0} )[/tex]

=2+2+2=6

and

111two=

[tex]2 \times ( {1}^{2} ) + 2( {1}^{1} ) + 2 \times ( {1}^{0} )[/tex]

but

[tex] {1}^{0} = 1[/tex]

now adding the results for that one also

2+2+2 +1=7

adding the total for all

6+7= 13

Final answer:

The sum of the binary numbers 110two and 111two is 1101two, which is equivalent to 13 in decimal form.

Explanation:

The question asks for the sum of two binary numbers: 110two and 111two. To add these two binary numbers, we align them by their least significant bits and perform binary addition:

110

+ 111

-----

1101

This is equivalent to the decimal addition of 6 (110two) + 7 (111two) which equals 13. In binary, 13 is represented as 1101two.

Determine the fraction equivalency of the decimal number 2.46.

Answers

Final answer:

The fraction equivalency of the decimal number 2.46 is 123/50.

Explanation:

To determine the fraction equivalency of the decimal number 2.46, we need to express it as a fraction with an integer numerator and a power of 10 in the denominator. To start, we can express 2.46 as 246/100 since moving the decimal point two places to the right converts the decimal into an integer and the equivalent power of 10 in the denominator. However, to find the simplest form of the fraction, we should divide both the numerator and the denominator by the greatest common divisor (GCD), which in this case is 2, to get 123/50. Therefore, the equivalent fraction for the decimal number 2.46 is 123/50.

3(a+(6x)y)+(x+5) associative property of addition, commutative property of addition, or distributive property

3(a+y(6x))+(x+5) associative property of multiplication
Commutative property of multiplication
Distributive property

3a+y18x+(x+5)
Associative property of addition
Commutative property of addition
distributive property

Answers

Commutative Property Of Multiplication
Final answer:

The original equation was transformed using a series of mathematical properties. The associative and commutative properties of addition were used to rearrange the terms, and the distributive property was used to simplify the equation. This exercise helps to understand how different mathematical properties can be used to simplify algebraic expressions.

Explanation:

The student has made changes in the equation by applying different mathematical properties like associative, commutative, and distributive properties. In the first transformation of equation, student applied the associative property of addition and commutative property of addition to rearrange terms inside brackets, then applied distributive property to multiply each term inside the bracket with 3. Similarly, in the second transformation, the associative property of multiplication was used to group certain terms together, then the distributive property was used to multiply these terms. Finally, the equation was simplified using the commutative property of addition.

Learn more about Mathematical Properties here:

https://brainly.com/question/13518455

#SPJ3

Help me please!! Will mark brainliest

Answers

Answer:

see explanation

Step-by-step explanation:

Given

F = [tex]\frac{9}{5}[/tex](K - 273.15) + 32

Multiply through by 5 to clear the fraction

5F = 9(K - 273.15) + 160 ( subtract 160 from both sides )

5F - 160 = 9(K - 273.15) ← distribute

5F - 160 = 9K - 2458.35 ( add 2458.35 to both sides )

5F + 2298.35 = 9K ( divide both sides by 9 )

K = [tex]\frac{5F+2298.35}{9}[/tex]

(b)

When F = 180, then

K = [tex]\frac{5(180)+2298.35}{9}[/tex]

   = [tex]\frac{900+2298.35}{9}[/tex]

   = [tex]\frac{3198.35}{9}[/tex]

   ≈ 355.37 ( to the nearest hundredth )

How would you solve this?

Answers

Answer:

2 2/3 cups of flour

Step-by-step explanation:

2/3 • 4 = 2 2/3

That's because 2/3 already makes 2 dozen cookies and you need to make 8 dozen so you need to multiply by 4 to get your answer.

524+920 Enter your answer either as an integer or as a fraction in simplest form

Answers

Answer:

1444

Step-by-step explanation:

524 + 920 = 1444

Answer:

1,444/1

Step-by-step explanation:

The answer to the problem is 1,444. To put the answer in fraction form, you can say 1,444/1. If they are asking for the numbers to be put in fraction form, you can say 524/1 + 920/1. If they are asking both, 524/1 + 920/1 = 1,444/1.

32 divided by 2(2^3 -4)

Answers

First, you solve the exponent: 2(8-4)
—————
32
Do PEMDAS

2(4)
——
32

8

32

1

4

That’s your final answer :)

If 3(x - 4) = x + 4, then x =8

Answers

Answer:

Valid

Step-by-step explanation:

3(x-4)=x+4              Given

3x-12=x+4                Distribute

2x=16                      Subtract x from both sides and add 12 to both sides

x=8                           Divide each side by 2.

 

Hey there!

3(x - 4) = x + 4

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

3x - 12 = x + 4

3(8) - 12 = 8 + 4

24 - 12 = 8 + 4

12 = 12

Therefore, this makes this statement TRUE

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

9/10 ÷ 2/10 ansewer​

Answers

Answer:

4.5 or 4 and a half

Step-by-step explanation:

9/10 divided by 2/10

put 2/10 into it's reciprocal and multiply it by 9/10

10/2 * 9/10

10      9

_     *  _

2        10

^ (visualization)

multiple into 90/20, divide numerator and denominator by 10 to get 9/2

9/2 is 4.5

Answer: 4.5 or 9/2

Step-by-step explanation:

9/10 ÷ 2/10

9/10 x 10/2

9 x 10 = 90

10 x 2 = 20

Simplified: 9/2 or 4.5

June bought ​
3
1
2

​ gallons of white paint at $17.50 per gallon and ​
1
3
4

​gallons of blue paint at $19.00 per gallon.
What was her total cost?

PLEASE IF ITS RIGHT ILL GIVE ANNY ONE 5 STARS AND A THANKS HELP ME

Answers

Answer:

$8006

Step-by-step explanation:

312*17.5=5460

134*19=2546

5460+2546= 8006

i’m stuck on number 8 plz help anyone !!

Answers

Answer:

Sally's km/h during the first half hour is 7 .

The lowest average speed is between the 3rd and 4th stops.

Step-by-step explanation:

On the table during the first half hour, Sally traveled 7 km.

From the first stop to the second stop, she traveled 8 km; from the second stop to the third stop, she traveled 6 km; from the third stop to the fourth stop, she traveled 3 km; from the fourth stop to the fifth stop, she traveled 4 km; and from the fifth stop to the sixth stop she traveled 8 km. Therefore The lowest average speed is between the 3rd and 4th stops.

Plz rate Brainliest because this took a long time.

I need help with the proofs !

Answers

Answer:

All you have to do is show that both are the same distance from the lines

Step-by-step explanation:

Having Trouble finding the answer.

The fractions models below represent two fractions of the same whole.
how many 7/10s are there in 1/5?

plz help! Thank YOU!

Answers

Answer:

3.5

Step-by-step explanation:

Changed them to decimals ( top number divided by the bottom will get you the decimal) and I got the answer. message me if you need more help

There are approximately 2/7  7/10s in 1/5.

The calculation step by step to find out how many 7/10s are there in 1/5.

1. We have two fractions:

[tex]- \( \frac{7}{10} \)[/tex]

[tex]- \( \frac{1}{5} \)[/tex]

2. To compare these fractions, we need to make their denominators the same. The least common multiple (LCM) of 10 and 5 is 10.

3. Convert both fractions to have a denominator of 10:

[tex]- \( \frac{7}{10} \)[/tex] remains the same.

[tex]- \( \frac{1}{5} \) becomes \( \frac{2}{10} \) (since \( \frac{1}{5} = \frac{2}{10} \)).[/tex]

4. Now, let's divide [tex]\( \frac{2}{10} \) by \( \frac{7}{10} \)[/tex]:

[tex]- \( \frac{2}{10} \div \frac{7}{10} \)[/tex]

- Multiply by the reciprocal of the second fraction:

[tex]\( \frac{2}{10} \cdot \frac{10}{7} \)[/tex]

 - Multiply the numerators:[tex]\( 2 \cdot 10 = 20 \)[/tex]

- Multiply the denominators: [tex]\( 10 \cdot 7 = 70 \)[/tex]

[tex]- The result is \( \frac{20}{70} \), which simplifies to \( \frac{2}{7} \).[/tex]

5. Therefore, there are approximately 2/7 7/10s in 1/5.

The teachers’ editions of a statistics textbook sell for $150 each, and students’ editions of the book sell for $50 each. Which function can be used to find the average cost per book if two teachers’ editions and x students’ editions are purchased?

Answers

Answer:

(300 + 50x)/(2 + x)

Step-by-step explanation:

Let the cost of teachers' edition books be t

Let the cost of students' edition books be s

So t = 150; s = 50

Then the total cost of 2 teachers' editions and x students' editions is 2t + sx = 2 × 150 + 50x = 300 + 50x.

The total number of books is 2 + x.

So the average cost per book is (300 + 50x)/(2 + x)

Answer:

the answer is D.

Step-by-step explanation:

Using =2L+2W, Find L when P is 50 and W is 10

Answers

Answer:

L = 15

Step-by-step explanation:

P = 2L + 2W

you know that P = 50, W=10

So you have to replace those values on the equation

50 = 2L + 2*(10)  --> Replace P and W

50 = 2L + 20  --> Multiply and now you are going to separate the unknown and the constants.

Remember that if you send a constant to the other side of the equal the sign will change to its opposite

50 - 20 = 2L  --> Solve the constants

30 = 2L    --> Now for the L, you have to leave it alone, so the 2 that is multiplying you have to send it to the other side of the equal but with the opposite operation,  the opposite operation of multiplying is dividing, so you have:

30/2 = L

L= 15

Other Questions
Q5: Which of these constitutes geologic evidence that Arizona has been wetter in the past than it is today?a. Fossil dinosaur trackways.b. Granitic rocks exposed deep in Grand Canyon.c. Halite and gypsum deposits.d. Mineralized rocks in fault zones that bound basins. One reason we need government, even in a market economy, is that a the invisible hand seldom leads to an efficient allocation of resources in any market. b property rights become too entrenched in the absence of government. c the invisible hand, while powerful, is not perfect. d there are insufficient quantities of externalities in the absence of government. Simplify tan 9x - tan 5x / 1 + tan 9x tan 5x. what was the real native American name of Pocahontas? Use mathematical induction to prove that for each integer n 4, 5^n 2^2n+1 + 100. (it is 5 to power of n and 2 to the power of 2n+1) The table shows the number of subscribers to several Internet providers. Determine if each statement is true or false. TABLE: Internet Provider Subscribers:Company A - 2.45 Company B - 3.12Company C - 2.83QUESTIONS:A. Company B earned $119 million last month. Each subscriber paid about $40. B. Company A earned $108 million last month. Each subscriber paid about $30.Guys please help. What part of the plot is the author most likely developing in this portion of thestory?IIIIIIIIIOA. ConclusionOB. ExpositionOc. ConflictPREVIOUS The English philosopher John Locke wrote: - that all people have the natural right to life and liberty. - only governments could provide rights to citizens. - a government should hold absolute power over its people. - all men are created equal. Examine this map. In which region did the Industrial Revolution begin?BO A. Region AOB. Region COC. Region BD. Region D Blossom Company has the following inventory data: Nov. 1 Inventory 35 units @ $7.10 each 8 Purchase 142 units @ $7.60 each 17 Purchase 71 units @ $7.45 each 25 Purchase 106 units @ $7.80 each A physical count of merchandise inventory on November 30 reveals that there are 118 units on hand. Ending inventory (rounded) under FIFO is What is the financial aspect for a business as to what database software they will buy? Baby Derek sees his mom leave a room and cries. He is only one year old. Why is he crying? a. Derek thinks his mom is gone for good and doesn't exist. b. Derek doesn't want to be left alone in the room. c. Derek is indicating he is scared. d. Derek is hungry or needs to have his diaper changed. Give a power series representation for the function f(x) x^3/(1 + 9x^2) use the distributive property to rewrite each expression. Then simplify (a+7)2 All of the following are ways you can commit to your career path except: (APEX)A: looking for internships in related fields B: researching careers in the field C: letting yourself be swayed by those who love you D: finding out what type of education you need A pea plant heterozygous for plant height, pod shape, and flower color was selfed. The progeny consisted of 272 tall, inflated pods, purple flowers; 92 tall, inflated, white flowers; 88 tall, flat pods, purple; 93 dwarf, inflated, purple; 35 tall, flat, white; 31 dwarf, inflated, white; 29 dwarf, flat, purple; 11 dwarf, flat, white. Which alleles are dominant in this cross? DNA sequences in many human genes are very similar to the sequences of corresponding genes in chimpanzees. The most likely explanation for this result is thata. humans and chimpanzees share a relatively recent common ancestor.b. humans evolved from chimpanzees.c. chimpanzees evolved from humans.d. convergent evolution led to the DNA similarities. to what class minerals do gold, sliver, and copper belong If you've waited more than five minutes at a YIELD sign, _____. Let V be the set of pairs (x; y) of real numbers and let the eld F be thereal number set. Dene the addition and scalar multiplication as follows:(x1; y1) + (x2; y2) = (x1 + x2; 0)c(x; y) = (cx; 0):Is V , with these operations, a vector space? Explain.