Your bank account hos a bolance of -$17. You deposit $70. What is your new balance? Show work:​

Matrix-vector multiplication is a linear operation because it satisfies the properties of scalar multiplication and vector addition, which are a(u+v) = au + av and a(cu) = cau, where a is a scalar and u and v are vectors.

Matrix-vector multiplication is a fundamental operation in linear algebra, where a matrix is multiplied by a vector to produce another vector. This operation is considered linear because it adheres to certain properties.

The first property is scalar multiplication, which states that multiplying a vector u by a scalar a and adding it to another vector v (a(u+v)) is equivalent to multiplying u by a (au) and v by a (av) separately and then adding the results (au + av). In other words, the operation distributes over vector addition.

The second property is the distributive property of scalar multiplication, which states that multiplying a vector u by a scalar c and then multiplying the resulting vector (cu) by another scalar a is equivalent to multiplying u by the product of the two scalars (cau). This property allows the scalar multiplication to be distributed over scalar multiplication.

These properties ensure that matrix-vector multiplication preserves the linearity of the underlying vector space. They enable the manipulation and analysis of systems of linear equations, transformations, and other mathematical operations involving matrices and vectors.

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The value of the side c will be 5.56 cm and angle C is 32.49° and angle B is 42.51°.

Let there is a triangle ABC such that |AB| = a units, |AC| = b units, and |BC| = c units and the internal angle A is of θ degrees, then we have:

a² + b² – 2ab cos C = c²

Given triangle ABC, A = 105°, a = 10 cm, b = 7 cm.

Then we have

7² + c² – (2 · 7 · c) cos 105° = 10²

c² + 3.62c – 51 = 0

On solving, we have

c = 5.56

Then the angle C will be

10² + 7² – 2 · 7 · 10 · cos C = 5.56²

                149 – 140 cos C = 30.91

                                 cos C = 0.8435

                                        C = 32.49°

We know that

       ∠A + ∠B + ∠C = 180°

105° + ∠B + 32.49° = 180°

                         ∠B = 42.51°

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Answer:

D

Step-by-step explanation:

(the above graph depicts a horizontal line that intersects the y axis at -2)

(so, y = -2)

Answer:

0

Step-by-step explanation:

Horizontal line x axis is 0 while the vertical y axis is undefined.

Probability is a measure of the likelihood or chance of an event occurring.

a. To find the percentage of years where Ithaca gets more than 40" of rain, we need to calculate the z-score for this value and then use a standard normal table to find the percentage. The z-score is:

z = (40 - 35.4) / 4.2 = 1.33

From a standard normal table, we find that the percentage of values above z = 1.33 is approximately 9.87%. Therefore, during about 9.87% of years, Ithaca gets more than 40" of rain.

b. To find the value of rainfall corresponding to the driest 20% of years, we need to calculate the z-score for the 20th percentile and then convert it back to rainfall units. The z-score is:

z = invNorm(0.20) = -0.84

where invNorm is the inverse normal function. Therefore,

-0.84 = (x - 35.4) / 4.2

Solving for x, we get:

x = 32.2"

So less than 32.2" of rain falls in the driest 20% of all years.

c. Since the sample size n = 4 is small and the population standard deviation is unknown, we need to use the t-distribution to describe the sampling distribution model of the sample mean. However, since the sample size is small, we also need to assume that the population follows a normal distribution.

Under these assumptions, the sampling distribution of the sample mean is approximately normal with a mean of μ = 35.4" and a standard error of σ/√n = 4.2/√4 = 2.1". Therefore, the sampling distribution of the sample mean is:

t(3, 35.4, 2.1)

where t denotes the t-distribution, 3 is the degrees of freedom (n - 1), 35.4 is the mean, and 2.1 is the standard error.

d. To find the probability that the 4-year average is less than 30", we need to calculate the z-score for this value and then use the t-distribution with 3 degrees of freedom to find the probability. The z-score is:

z = (30 - 35.4) / (4.2 / √4) = -2.57

Using a t-table or calculator with 3 degrees of freedom, we find that the probability of a t-value less than -2.57 is approximately 0.041. Therefore, the probability that those 4 years average less than 30" of rain is approximately 0.041 or 4.1%.

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Answer:

It should be -2x +6

Step-by-step explanation:

Answer:

-2x+6

Step-by-step explanation:

First, multiply x+2 by 3.

3 x x = 3x

3 x 2 = 6

3(x+2) simplifies to 3x+6

Rewrite the equation: 3x+6-5x

Combine like terms

3x - 5x = -2x

-2x+6

D. No, because the probability of being left-handed is greater, x must count the number of left-handed adults.

The binomial probability formula can be used to calculate the probability of a certain number of successes (or left-handed individuals) in a given number of trials (100 adults). In order for the binomial probability formula to be used, the trials must be independent, meaning that the selection of one person does not affect the selection of the next one. Since the probability of being left-handed is greater, the binomial probability formula cannot be used in this case and x must count the number of left-handed adults.

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Given an arithmetic sequence with the first term -6 and the common difference -7, the first five terms are: -6, -13, -20, -27, -34.

The formula for the n-th term of an arithmetic sequence is given by:

a(n) = a(1) + (n - 1) d

Where:

a(1): the first term

d = common difference

The consecutive terms of an arithmetic sequence can be obtained as:

a(n) = a(n - 1) + d

Information available in the problem:

first term = a(1) = -6

common difference = d = -7

Hence,

a(1) = -6

a(2) = -6 - 7 = -13

a(3) = -13 - 7 = -20

a(4) = -20 - 7 = -27

a(5) = -27 - 7 = -34

Therefore the first five terms are: -6, -13, -20, -27, -34

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Answer: 90

Step-by-step explanation:

1/2 x 20 x 9

Answer:

At Irtaza's Deli

Step-by-step explanation:

For this you should find the unit price and whichever is less is where you should go.

(1) Irtaza Deli:

First I would round the 5.99 to 6 then we'll do 6 divided by 7.

\(\frac{6}{7}=.8571428571=.86\)

(2) Brianna's Food Mart:

First I would round the 8.99 to 9 then we'll do 9 divided by 10.

\(\frac{9}{10}=.9\)

Now let's compare:

So the first store sells oranges for $.86 and the second store sells them for $.90. I don't know about you but I would go to the first store they would be much more cheaper.

Answer:

$18 less than the cost of 5 hot dog combos

Step-by-step explanation:

First, we see from the minus sign that this will be subtraction.  PEMDAS (order of operations) says we do the multiplication first, then the subtraction.

The chores overshadowed the joy of our Reunion, learned a valuable lesson about managing time and prioritizing obligations

Embarking on a bike ride to visit a friend who lives 3 miles away, little did I know that a looming sense of forgotten chores would soon disrupt my plans. Determined to fulfill my obligations, I mustered the strength to continue riding towards my friend's house, albeit with a heavy heart.

I pedaled towards my destination, the weight of my impending chores grew heavier with each passing moment. Thoughts of unfinished tasks occupied my mind, and I knew that I couldn't stay for long once I reached my friend's place. However, in my haste, a newfound urgency propelled me forward, and I found myself pedaling at a speed 5 mph faster than my initial journey.

With this increased velocity, the return trip promised to be swifter, yet time was slipping away. My mind raced as I calculated the implications of my predicament. The total round trip, comprising both the journey to my friend's house and the hurried return, needed to be accomplished within a tight time frame of 30 minutes.

As I approached my friend's house, I realized that I had no choice but to deliver my news swiftly and immediately turn back around. The momentary joy of reunion would be overshadowed by the pressing chores that awaited me. Regrettably, I bid my friend a hasty farewell, explaining the circumstances that compelled my premature departure.

Once on my bike again, I kicked up the pace, utilizing the extra speed to my advantage. The wind rushed past my face as I hurriedly retraced my path, pushing myself to complete the return trip as swiftly as possible. The seconds ticked away relentlessly, as the pressure mounted to make it back within the allocated timeframe.

In a flurry of determination, I managed to reach home just in the nick of time, fulfilling my duties and responsibilities. Exhausted but relieved, I contemplated the whirlwind of events that had transpired within the span of this half-hour adventure.

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Note the question be like :

A company is hosting a team-building event and has allocated a total of 4 hours for various activities. If Activity A takes 1 hour, Activity B takes 2 hours, and Activity C takes 45 minutes, what is the maximum amount of time that can be dedicated to Activity D while still staying within the allocated 4-hour timeframe?

Drivers who text spend about 10% of their driving time outside their own driving lane. True

It is accurate to say that 10% of the time texting while driving is spent in the incorrect lane. Driving while texting is extremely risky because it diverts the driver's attention from the road, making it impossible for him to see. According to research, 60% of people use cell phones while driving, making texting while driving a serious issue.

Using a phone while driving raises the likelihood of an accident.

Texting or using a phone in any other way has regularly been connected by researchers to higher risk. Talking on a telephone while driving has been linked to an increased crash risk in certain studies, but not all.

One of the major causes of many traffic collisions is using a cell phone while driving. Due to how distracting cell phone use is to a person's attention and mental focus, it is illegal to use a cell phone while driving in many nations.

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Here we must calculate the power from 3 to 4.

Solving:

The answer would be 81

The nonzero vector orthogonal to the plane through the points P, Q, and R is [-8/13, -8/13, -12/13].

To find a nonzero vector orthogonal to the plane through the points P, Q, and R, we can use the cross product of two vectors that lie in the plane.

Let's find the vectors PQ and PR, which can be found by subtracting the coordinates of P from the coordinates of Q and R:

PQ = Q - P = (-2, 1, 3) - (1, 0, 1) = (-3, 1, 2)

PR = R - P = (4, 2, 5) - (1, 0, 1) = (3, 2, 4)

Next, we'll take the cross product of these two vectors to find a vector orthogonal to the plane:

n = PQ x PR =

[(1)(4) - (2)(2), (2)(-3) - (3)(1), (3)(3) - (2)(-2)]

= [-8, -8, -12]

This vector is orthogonal to the plane through the points P, Q, and R. To make it a nonzero vector, we can scale it to have magnitude 1:

n = [-8, -8, -12] / sqrt((-8)^2 + (-8)^2 + (-12)^2) = [-8/13, -8/13, -12/13]

So, the nonzero vector orthogonal to the plane through the points P, Q, and R is [-8/13, -8/13, -12/13].

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Y is constant.

The equation of line will be

Answer:

y=1

Step-by-step explanation:

Answer:

This needs to be in higher quality as i cannot see the question at all!

Step-by-step explanation:

Have a good day :)

Answer:

1

Step-by-step explanation:

Given:

\(R^2=0.92,a=8000,b=0.9\).

Exponential regression model is

\(y_1\sim a(b)^{x_1}\)

To find:

The exponential regression representing the population of Lazy Town as a function of time in years.

Solution:

Exponential regression model is

\(y_1\sim a(b)^{x_1}\)       ...(i)

We have, \(a=8000,b=0.9\).

Substituting \(a=8000\) and \(b=0.9\) in (i), we get.

\(y_1\sim 8000(0.9)^{x_1}\)

Therefore, the exponential regression representing the population of Lazy Town as a function of time in years, is \(y_1\sim 8000(0.9)^{x_1}\).

Answer: 10 km

Step-by-step explanation:

Y' = 3.97, Given that b=0.53 and a=2.38,To compute the predicted value for Y when X=3.

The formula for computing Y' is given by: Y' = a + bX  Substitute the given values of a,b and X into the formula for Y', we have;Y' = 2.38 + 0.53(3) Recall the order of operations;

BODMAS (Bracket, of, Division, Multiplication, Addition, Subtraction).

We do the multiplication firstY' = 2.38 + 1.59Now, add the decimal numbers together to get the predicted value for Y;Y' = 3.97Thus, the predicted value for Y is 3.97 when X=3. Answer: Y' = 3.97.

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Answer:

y = -1/18x - 89/18

Step-by-step explanation:

Step 1: Find the slope of the perpendicular line

Do this by taking the negative reciprocal of the original line

m = -1/18

Step 2: Find b

y = -1/18x + b

-5 = -1/18(1) + b

-5 = -1/18 + b

b = -89/18

Step 3: Rewrite entire equation

y = -1/18x - 89/18

Answer:

x = 53°

Step-by-step explanation:

Forming the equation,

→ x + (2x + 21°) = 180°

Now the value of x will be,

→ x + (2x + 21°) = 180°

→ 3x = 180° - 21°

→ x = 159°/3

→ [ x = 53° ]

Hence, the value of x is 53°.

Answer:

true

Step-by-step explanation:

hope this helps have an amazing day!

Answer:

T

Step-by-step explanation:

hope it help

The solution to the inequality 13x|20 is all real numbers, as any value of x, no matter how small or large, will make the statement true.

The way to address inequity Using only real values, 13x|20. This means that there is no single solution to this inequality. The inequality is essentially asking what values of x will make the statement true. In this case, any value of x, no matter how small or large, will make the statement true. This is because the absolute value of x is being taken, which means that the value of x is being evaluated regardless of the sign--whether it is positive or negative. For example, if x is -1, then 13x|20 would be 13(-1)|20, which simplifies to -13|20, or 20. This means that no matter what the value of x is, it will always make the statement true. Therefore, the solution to the inequality is all real numbers.

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Q1

Answer:

\(x \leqslant \frac{5}{3} \)

Step-by-step explanation:

\(3x \leqslant 5 \\ 3x \div 3 \leqslant 5 \div 3\\ x \leqslant \frac{5}{3} \)

explanation for second step:

you divide each side by 3 to get rid of the '3' in '3x'

Answer:

Step-by-step explanation:

Answer:

x=58

Step-by-step explanation:

use cos x to find the answer

The individual failure rate needs to be approximately 3.33% for only 20% of 20 users to fail, assuming that the probability of failure is independent of another's failure.

If the chance of failure is independent of another's failure, it means that the probability of each individual failing is the same, and we can assume that the failures follow a binomial distribution.

Let p be the probability of an individual failing, and n be the number of trials (in this case, the number of users, n = 20).

The probability of exactly k failures out of n trials is given by the binomial probability formula:

\(P(k) = (n choose k) \times p^k \times (1-p)^{(n-k)\)

where (n choose k) is the binomial coefficient, equal to n! / (k! × (n-k)!).

To find the individual failure rate needed for 20% of 20 users to fail, we need to solve for p such that P(4) = 0.2, where k = 4 is the number of failures we want to allow.

P(4) = (20 choose 4) \(\times p^4 \times (1-p)^{(20-4) }= 0.2\)

Using a binomial calculator or software, we can solve for p and get:

p ≈ 0.0333 or 3.33%

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