Mathematics High School

can someone please help?

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Answer 1

Answer:

Step-by-step explanation:

Related Questions

helpppp meeee pleaseee

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1248

1200x0.04=48

1200+48=1248

Select the correct answer.
This graph represents a quadratic function.

Answers

Answer:

a = - 1

Step-by-step explanation:

given the zeros of a parabola x = a and x = b , then the factors are

(x - a) and (x - b) , then the equation is

y = a(x - a)(x - b) ← a is a multiplier

here the zeros are x = - 3 and x = 3 , then factors are

(x - (- 3) ) and (x - 3) , that is (x + 3) and (x - 3) and the equation is

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

to find a substitute any other point on the curve into the equation

using (0, 9 ) , then

9 = a(0 - 3)(0 + 3) = a(- 3)(3) = - 9a ( divide both sides by - 9 )

- 1 = a

Shelley's cup of tea cooled down
1
2
of a degree in 10 minutes. At what rate is her tea cooling down?

Answers

Shelley's cup of tea is cooling down at the rate of 1.2 degree per minute.

According to the question,

We have the following information:

Shelley's cup cooled down 12 degrees in 10 minutes.

In order to find the rate of cooling down of the cup of tea, we will divide the degrees of the cooling by the total number of minutes.

So, we have the following expression:

Rate of cooling down of Shelley's cup = Total degrees the cup cooled down/total time taken

Rate of cooling down of Shelley's cup = 12/10

Rate of cooling down of Shelley's cup = 1.2 degree per minute

Hence, the rate of cooling down of Shelley's cup is 1.2 degree per minute.

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Answer:

1/20

Step-by-step explanation:

Find the rate in degrees per minute. Divide

of a degree by 10 minutes.

To divide by 10, multiply by its reciprocal,

÷10

Shelley's tea is cooling down at a rate of

of a degree per minute.

help needed with show work. trigonometry

Answers

Answer:

16.4 cm

Step-by-step explanation:

In a right triangle :

cosine 43 = adjacent leg / hypotenuse = 12/x

SO:

cosine 43 = 12/x then x = 12 / cos 43 = 16.4 cm

HELP PLS 60 POINTS , Math Law Identification.

Answers

The first law is called the Law of Detachment. The law states that if p → q and p is true, then q is true.

The second law is the Law of Syllogism. It states that If p → r and q → r, then p → r is true.

What is the use of the Law of Detachment?

It is to be noted that the Law of Detachment is the most often employed deductive reasoning theory.

In other words, if a conditional statement and its hypothesis are true, the conclusion is likewise true. In other words, the conclusion may be "separated" from the conditional.

In the above instance, p is synonymous with having a cat; while q is synonymous with it chasing a rat.

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What is the value of -3/15-s+ 25³ when s=-3?

Answers

Answer:

=[tex]\frac{78139}{5}[/tex]

Step-by-step explanation:

[tex]-\frac{3}{15}-(-3)+25^{3} \\=\frac{78139}{5}[/tex]

Write a story about temperatures that this expression could represent: 27+(-11)

Draw a number line diagram and write an expression to represent this situation: “On Tuesday at lunchtime, it was 29ºC. By sunset, the temperature had dropped to 16ºC.”

(this is summit learning btw)

Answers

The temperature “On Tuesday at lunchtime, it was 29ºC

i.e., 29 - 16.

Given,

Write a story about temperatures that this expression could represent:

27+(-11)

Now, According to the question:

1. The temperature is 27 degree C in the morning and reduced 11 degree C in the evening , the difference in temperature is 27 + (-11)

2. “On Tuesday at lunchtime, it was 29ºC. By sunset, the temperature had dropped to 16ºC.”

Again, Similarly

= 29 - 16

About Number line,

Draw a number line and allocate a point 16 degree C on the left side

and, 29 allocate a point on the right side.

Hence, The temperature “On Tuesday at lunchtime, it was 29ºC

i.e., 29 - 16.

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the average life of a certain type of small motor is 10 years with a standard deviation of 2 years. the manufacturer replaces free of charge any motor that fails during a warranty period. if she is willing to replace only 3% of the motors that fail, how long should should the warranty period last? assume that the lifetime of a motor follows a normal distribution.

Answers

using the normal distribution, the warranty period of motor last at 6.24 years.

According to given question , the average life of motor = 10 years and standard deviations = 2 years .

let X be the time period in which the warranty period of motor last . X ~ N( μ, σ²) where u is mean and s is standard deviations. X ~ N( 10, 2²) ⁼ N(μ, σ²)

it is given that only 3% number of motors are replaced and 3% = 0.03

Using normal distribution , P( X≤ x)= P(( X - μ )/ σ ≤ (x- μ)/σ ) = P ( Z ≤ (x- μ ) / σ ) =0.03

Z = (X- μ) / σ => X = Z (σ) + μ

p (Z ≤ -1.88) = 0.03 so, Z-value is - 1.88..

put all the value of variables in above formula we get , -1.88 ( 2) + 10 = X => X = - 3.76 + 10

=> X = 6.24

Thus , the motor's warranty period lasted about 6.24 years.

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Hi can anyone help with this question? I have been stuck on this for hours

Answers

Answer:

ab = - 1

Step-by-step explanation:

Given

Equations:

1 - a tan θ = sec θ,b - cot θ = cosec θ.

To find

The value of ab

Solution

Recall the identities:

tan θ = sin θ / cos θsec θ = 1 / cos θ cot θ = cos θ/ sin θcosec θ = 1 / sin θsin² θ + cos² θ = 1(a + b)(a - b) = a² - b²

Now find a and b, then find their product.

1 - a tan θ = sec θ1 - a sin θ / cos θ = 1 / cos θ cos θ - a sin θ = 1a sin θ = cos θ - 1a = (cos θ - 1) / sin θ

b - cot θ = cosec θb - cos θ/ sin θ = 1 / sin θb = cos θ/ sin θ + 1 / sin θb = (cos θ + 1) / sin θ

ab = (cos θ - 1) / sin θ × (cos θ + 1) / sin θ = (cos² θ - 1) / sin² θ = - sin² θ / sin² θ = - 1

Ellos ____ en la casa. (To express location)

Answers

Answer: Estan

Step-by-step explanation: I know spanish

Joshua has 245 feet of fence. His rectangular yard is 54 feet by 78 feet. Does Joshua have enough fence for his yard?

Answers

We can calculate the perimeter of the rectangular yard to find out how much fence Joshua needs:

[tex]P=2(78+54)=2(132)=264ft[/tex]

since the perimeter of the yard is 264 yards, then Joshua does not have enough fence for his yard, since he only has 245 t of fence, and he needs 264ft

What is an equation of the line that passes through the point (-4,8)(−4,8) and is parallel to the line x+y=6x+y=6?

Answers

The equation of the line that passes through the point; (-4, 8) and is parallel to x + y = 6 as required in the task content is; x + y = 4.

What is the equation of the line that passes through the given point and is parallel to the given line?

It follows that the equation of the line that passes through the given point and is parallel to the given line is to be determined.

By expressing the given linear equation in slope-intercept form; it follows that we have;

x + y = 6

y = -x + 6

Hence, the slope of the equation by comparison with; y = mx + c is; -1.

Therefore, the slope of the required equation is same as the two lines are said to be parallel.

Ultimately, the required equation from point-slope form of an equation is;

( y - 8) = -1 ( x - (-4))

y - 8 = -x - 4

x + y = -4 +8

x + y = 4.

Ultimately, the required equation is; x + y = 4.

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HI NEED THIS ASAPP GRAOHS OF INVERSE FUNCTIONS

Answers

Answer: D (last bubble)

Step-by-step explanation:

slope of f is 2/3

inverse of 2/3 is 3/2

that is graph h

these graphs are symmetrical around the line y = x

The answer is 2/3 points

Determine which integer will make the inequality 4x + 6 < 2x + 12 false.

S:{1}
S:{−1}
S:{4}
S:{−4}

Answers

Answer:

s:{4}

Step-by-step explanation:

4(4)+6<2(4)+12

16+6<8+12

32<20

which is the only false one

You want to sample our class. You split the class by gender and select 5 students of each gender. What type of sample is this?

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this type of sample is called fractions

Step-by-step explanation:

what is an equation of the line that passes through the point (8,-7) and is parallel to the line x+2y=18

Answers

Answer: The equation of line parallel to given line passing through (8,-7) is:

Step-by-step explanation:

Given line is:

5x+4y=16

first of all, we have to convert the equation of given line in slope-intercept form

Dividing both sides by 4

Slope intercept form is:

The slope of given line is:

Let m1 be the slope of line parallel to given line

"The slopes of two parallel lines are equal"

The equation of line parallel to given line will be:

Putting the value of slope

Putting the point (8,-7) in the equation

Putting the value of b

Hence,

The equation of line parallel to given line passing through (8,-7) is:

Sanjay a is making punch. he uses 1/3 c of pineapple juice for every 3/4 c of orange juice. how many cups of pineapple juice does he need if he uses 3 c of orange

Answers

Sanjay a is making punch. he uses 1/3 c of pineapple juice for every 3/4 c of orange juice Then 4/3 cups of pineapple juice does he need if he uses 3 c of orange

equation of direct proportion between x and y

x1/y1 = x2/y2

as per given ,

let x= quantity of pineapple juice and y= quantity of orange juice

x1= 1/3 , y1 = 3/4

x2 = ? and y2 =3

x1/y1 = x2/y2

(1/3)/ (3/4) = x2/3

4/9= x2 /3

4/3 = x2

Hence ,Sanjay a is making punch. he uses 1/3 c of pineapple juice for every 3/4 c of orange juice Then 4/3 cups of pineapple juice does he need if he uses 3 c of orange

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Find the equation of the line that goes through the points (2, 10) and (-1, -2).

Answers

Answer:

y=4x+1

Step-by-step explanation:

Step 1: plot your points

Step 2: draw a line through them

Step 3: find the slope (RISE/RUN) = 12/3 = 4

Step 4: find the y-int = 1

y=mx+b where x and y are variables, m is the slope and b is the y-int

y = 4x + 1

Hope that helps

Solve z3 = 8.
answers are
z = −4
z = 4
z = ±2
z = 2

Answers

Answer:

I'll assume z3 is actually z^3

z = 2

Step-by-step explanation:

z*z*z = 8

(2)*(2)*(2) = 8

Write an algebraic expression that matches Six less than a number

Answers

ANSWER

x - 6

EXPLANATION

We want to write an algebraic expression that matches the statement:

Six less than a number.

First, let that unknown number be x.

So, 6 less than x.

Since it means that we are taking 6 from x, we subtract 6 from x.

That will be:

x - 6

Janell is standing on a set of bleacher and throws a ball in the air at an initial velocity of 35 ft/s. The height of the ball, h, at t seconds is modeled by the equation h=-16t^2+35t+6. How many seconds will it take the ball to reach the ground?

Answers

The time taken by the ball to reach the ground is 0.067 seconds

Given,

The initial velocity of the ball (speed) = 35 feet/second

The height of the ball (distance), h = -16t² + 35t + 6

We have to find the time, (t in seconds) taken by the ball to reach the ground.

Speed = distance/time

So, Time = distance/speed

Here,

Time = (-16t² + 35t + 6) / 35

We have to solve the equation first.

-16t² + 35t + 6 = 0 is in quadratic form. So, we can solve this by using quadratic formula.

Quadratic formula = [tex]\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a}[/tex]

Here,

a = -16, b = 35, c = 6

Now,

[tex]\frac{-b(+-)\sqrt{b^{2}-4ac } }{2a}[/tex]

= [tex]\frac{-35(+-)\sqrt{35^{2}-4(-16)(6) } }{2(-16)}[/tex]

= [tex]\frac{-35(+-)\sqrt{1225 +384} }{-32}[/tex]

= (-35±√1609) / -32

= (-35±40.11) / -32

Now,

Solve for:

(-35 + 40.11) / -32 = 5.11/-32 = -0.15

Solve for

(-35 - 40.11) / -32 = -75.11 / -32 = 2.35

Lets take the height as 2.35 feet.

Now,

Time = distance/speed

Time = 2.35/35 = 0.067

Therefore, the time taken by the ball to reach the ground is 0.067 seconds.

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Prove the identity.
(csc²x - 1) secx = cosx csc x

Answers

It’s not an identity I believe

2. Each year a certain amount of money is deposited in an account which pays an
annual interest rate of r so that at the end of each year the balance in the account is
multiplied by a growth factor of x = 1+r. $500 is deposited at the start of the first
year, an additional $200 is deposited at the start of the next year, and $600 at the
start of the following year.
a. Write an expression for the value of the account at the end of three years in
terms of the growth factor x.
b. What is the amount (to the nearest cent) in the account at the end of three
years if the interest rate is 2%?
3. Consider the polynomial function p given by p(x) = 5x³ + 8x²-3x + 1. Evaluate the
function at x = -2.

Answers

Answer:

2a. ((500x +200)x +600)x

2b. $1350.68

3. -1

Step-by-step explanation:

2. You want to know the balance in an account at the end of 3 years with deposits at the beginning of successive years being $500, $200, and $600, and with deposits having an annual growth factor of x. You want (a) an expression for the balance in terms of x, and (b) the balance when x=1+2%.

3. You want the value of p(-2) for p(x) = 5x³ +8x² -3x + 1.

2. Account Balancea. Expression

$500 is deposited at the beginning of the first year. The problem statement tells us that this has been multiplied by growth factor x by the end of the year, so the balance at that point is 500x.

At the beginning of the second year, $200 is added to the account, and the entire amount is multiplied by the growth factor for the year. That makes the balance at the end of the second year be ...

(500x +200)x

Then $600 is added, and again the account grows by a factor of x. At the end of the third year, the balance is ...

balance = ((500x +200)x +600)x

b. Balance for r=2%

The growth factor is given as x = 1 +r. When r = 2%, this becomes x = 1.02. Then the balance at the end of year 3 is ...

((500·1.02 +200)·1.02 +600)·1.02 = 1350.68

The amount in the account at the end of three years is $1350.68.

3. Polynomial value

The value of p(x) = 5x³ +8x² -3x +1 for x=-2 is found by substituting -2 where x is found. Evaluation can be easier by rewriting the polynomial to Horner form:

p(x) = ((5x +8)x -3)x +1

p(-2) = ((5(-2) +8)(-2) -3)(-2) +1 = ((-2)(-2) -3)(-2) +1 = (1)(-2) +1 = -1

The value of the function for x=-2 is -1.

Additional comment

You will note that the expression in problem 2 is also written in Horner form. If it were expanded, it would be 500x³ +200x² +600x. Evaluation takes fewer steps when Horner form is used.

Fred earns $16.50 an hour for overtime. He worked overtime on Monday and Thursday this week. On Monday, he worked 4 hours of overtime. His total
overtime pay for the week was $123.75.
Write and solve an equation to find the number of overtime hours, h, Fred worked on Thursday.

Answers

Fred's overtime pay is $16.50 an hour. He put in extra time this week on Monday and Thursday. The equation is $123.75-4 times the x value =h and h value is 57.75 and the working hours are 3.5 hours.

Given that,

Fred's overtime pay is $16.50 an hour. He put in extra time this week on Monday and Thursday. He put in four hours of extra on Monday. He received $123.75 in overtime compensation in total for the week.

We have to determine how many overtime hours, h, Fred worked on Thursday, write an equation and solve it.

We can write the equation as

$123.75-4 times the x value =h

Here,

x value is $16.50

We get,

$123.75-4×$16.50=h

h=57.75

To check hours working

57.75/16/50

=3.5 hours.

Therefore, the equation is $123.75-4 times the x value =h and h value is 57.75 and the working hours are 3.5 hours.

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Please do number one please thank you

Answers

Answer:

Step-by-step explanation:

Hypothesis: you live in a state that borders California

To win a trivia game, Nevan must score 90 points.
Each correct answer is worth 1 3/4 points, and each incorrect answer is worth −1/4 points.
If he gets 58 questions correct and 22 questions incorrect, does Nevan win? How many points does he score?

Answers

Answer: no he does not win he got 67 points not 90 or more

Step-by-step explanation:

Is a triangle with vertices G(3, 2), H(8, 5), and K(0, 10) a right triangle? Justify your answer.

Answers

First you need to ubicate those vertices in a plane as follow:

Then you link the vertices with lines to form the triangle:

Knowing that a right triangle must have one angle of 90º

The answer is that yes, it is a right triangle because it has an angle of 90º in the vertice H(8,5)

Question 4 (10 point)

Answers

Answer:

Step-by-step explanation:

25 is the square root of 625

Answer:

Step-by-step explanation:

[tex]\sqrt{625} = \sqrt{25^{2} } = 25[/tex]

What is x^3 pls help

Answers

Answer:

its x^3 or 1

Step-by-step explanation:

there's nothing else you can do with it

also it might be 1 because x by itself is 1 so x^3 is considered 1^3

find the volume of this triangular prism

Answers

Answer:

The volume would be [tex]396cm^3[/tex].

Step-by-step explanation:

Answer:

792 cm

Step-by-step explanation:

99*8

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