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2 years ago

I think it’s b but I’m not sure

Mathematics

1 answer:

laila [671]2 years ago

3 0

No, its D

Just look at the rounds mentioned and subtract the scores from higher round with lower round.

Look at A: round 2 score - round 1 score = -2?
-3 -1 = -4 change, not -2 change so it is wrong

Look at B: round 3 score - round 1 score =-1?
-2-1 =-3 change, not -1 change so it is wrong

Look at C: round 3 score - round 2 score =-1?
-2 -(-3) = 1 change, not -1 change so it is wrong

Look at D: round 3 score - round 1 score =-3?
-2-1 = -3 change, matches with -3 so it is correct.

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Question 8 Find the unit vector in the direction of (2,-3). Write your answer in component form. Do not approximate any numbers

slamgirl [31]

Answer:

The unit vector in component form is $\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$ or $\hat{u} = \frac{2}{\sqrt{13}}\,i-\frac{3}{13}\,j$ .

Step-by-step explanation:

Let be $\vec u = (2,-3)$ , its unit vector is determined by following expression:

$\hat {u} = \frac{\vec u}{\|\vec u \|}$

Where $\|\vec u \|$ is the norm of $\vec u$ , which is found by Pythagorean Theorem:

$\|\vec u\|=\sqrt{2^{2}+(-3)^{2}}$

$\|\vec u\| = \sqrt{13}$

Then, the unit vector is:

$\hat{u} = \frac{1}{\sqrt{13}} \cdot (2,-3)$

$\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$

The unit vector in component form is $\hat{u} = \left(\frac{2}{\sqrt{13} },-\frac{3}{\sqrt{13}} \right)$ or $\hat{u} = \frac{2}{\sqrt{13}}\,i-\frac{3}{13}\,j$ .

6 0

3 years ago

Find the area of the figure.<br> T<br> 13 ft<br> 10 ft)<br> 13 ft?

lara31 [8.8K]

13 ft is the right answer

3 0

3 years ago

I need help one this question.

OLga [1]

Answer:

-2

Step-by-step explanation:

the y-intercept is -2

6 0

2 years ago

Read 2 more answers

Which equation represents a function that is nonlinear?

vekshin1

Answer:

y = x^2 - 25

Step-by-step explanation:

curvy so nonlinear

3 0

3 years ago

What is the answer to 5 1/2 - 2/3

aniked [119]

To solve this problem, we first have to convert 5 1/2 into an improper fraction. To do this, we multiply the unit (5) times the denominator (2) and then add the numerator (1) to the product, while still keeping the same denominator.

(5 * 2) + 1 = 10 + 1 = 11/2

Now, this makes our expression: 11/2 - 2/3

Next, we have to find a common denominator for 2 and 3 by finding their shared LCM, or least common multiple. In this case, the LCM is 6. This means that we are going to convert both of the fractions in the expression into fractions with the denominator 6, so that we can easily compute the subtraction.

11 * 3 / 2 * 3 - 2 * 2 / 3 * 2

33/6 - 4/6

Now, we can simply subtract the numerators to find our final answer.

29/6

Your final answer is 29/6.

Hope this helps!

3 0

3 years ago