at least how many hours of sleep do students ages seven to twelve need per night
A seven
b eight
C nine
d ten

Answers

Answer 1

Answer:

10 hours

Step-by-step explanation:

ok


Related Questions

A contractor building an airport needs to know how far a water tower is away from
end of the runway. Using her diagram below can you determine how far away the
water tower is?

Answers

Answer:

B.

Step-by-step explanation:

tan(82)= X/100

100•[tan(82)]= [X/100] •100 Multiply each side by 100 to get the X by itself on the right side

X= to 711.537

whoever answers first get brainliest

Answers

Wdym I can help u but wym

Eric's father Works two part-time jobs one in the morning and one in the afternoon and works a total of 40 hours each five day workweek if your schedule is the same each day and he works 3 hours each morning how many hours does Eric's father work each afternoon

Answers

Answer:

8

Step-by-step explanation:

because 40 devided by 5 equals 8 so thats how many hours in the afternoon

3 * 5 = 15 that is how many hours he works in the mornings

40 - 15 = 25

He works 25 hours in the afternoon every week.
25 / 5 = 5

So his father works 5 hours every after noon 5 days out of the week

3/4 divided by 1/5
Please answer soon

Answers

Answer:

15

Step-by-step explanation:

im in algebra two so you can trust my answer. happy holidays and stay safe!


3.75
forgive me if i’m wrong but i’m positive it’s correct

Help please

How are the properties of exponents used to rewrite expressions?

Answers

Answer: The five exponent properties are

Product of Powers: When you are multiplying like terms with exponents, use the product of powers rule as a shortcut to finding the answer. It states that when you are multiplying two terms that have the same base, just add their exponents to find your answer.

Power to a Power: When raising a power to a power in an exponential expression, you find the new power by multiplying the two powers together. ... Then multiply the two expressions together. You get to see multiplying exponents (raising a power to a power) and adding exponents (multiplying same bases).

Quotient of Powers: When you are dividing like terms with exponents, use the Quotient of Powers Rule to simplify the problem. This rule states that when you are dividing terms that have the same base, just subtract their exponents to find your answer. The key is to only subtract those exponents whose bases are the same.

Power of a Product: The Power of a Product rule is another way to simplify exponents. When you have a number or variable raised to a power, it is called the base, while the superscript number, or the number after the '^' mark, is called the exponent or power.

Power of a Quotient: The Power of a Quotient rule is another way you can simplify an algebraic expression with exponents. When you have a number or variable raised to a power, the number (or variable) is called the base, while the superscript number is called the exponent or power

You can use these any way you want to rewrite an equation.

Hope this helped

Step-by-step explanation:

What is the exact value of tan ( 5 pi/8 )

Answers

Answer: Choice D) [tex]\tan\left(\frac{5\pi}{8}\right) = - \sqrt{\frac{2+\sqrt{2}}{2-\sqrt{2}}}\\\\\\[/tex]

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

Explanation:

Make sure your calculator is in radian mode. Use your calculator to find that tan(5pi/8) = -2.41421 which is approximate.

Since the value is negative, this means the answer is between choices C and D. You can use your calculator to compute those expressions given and you should find it matches with choice D.

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

Further explanation:

We can apply the half angle identity for tangent like so

[tex]\tan\left(\frac{x}{2}\right) = \pm \sqrt{\frac{1-\cos(x)}{1+\cos(x)}}\\\\\\\tan\left(\frac{5\pi/4}{2}\right) = -\sqrt{\frac{1-\cos(5\pi/4)}{1+\cos(5\pi/4)}}\\\\\\\tan\left(\frac{5\pi}{8}\right) = -\sqrt{\frac{1-\left(-\frac{\sqrt{2}}{2}\right)}{1+\left(-\frac{\sqrt{2}}{2}\right)}}\\\\\\[/tex]

Simplifying further, we get

[tex]\tan\left(\frac{5\pi}{8}\right) = -\sqrt{\frac{1+\frac{\sqrt{2}}{2}}{1-\frac{\sqrt{2}}{2}}}\\\\\\\tan\left(\frac{5\pi}{8}\right) = -\sqrt{\frac{2+\sqrt{2}}{2-\sqrt{2}}}\\\\\\[/tex]

In the last step, I multiplied top and bottom of the outer fraction by 2 to clear out the denominators of the inner fractions.

Answer:

Answer D

Step-by-step explanation:

on edge 2023

Find the value of x. Diagram is not to scale

Answers

Answer:

b: 70

Step-by-step explanation:

45+45=90

24+24=48

The scale of the triangle is 2

35*2=70

Mrs. Maxwell is teaching a 5th grade class. She is standing 9 meters in front of Bruce. Ruth is sitting to Bruce's right. If Ruth and Mrs. Maxwell are 15 meters apart, how far apart are Bruce and Ruth?

Answers

9514 1404 393

Answer:

  12 m

Step-by-step explanation:

The distances of interest are the sides of a right triangle whose right angle is at Bruce. The hypotenuse of the triangle is the Teacher-Ruth distance. The unknown side (x) can be found using the Pythagorean theorem:

  x² + 9² = 15²

  x² = 225 -81 = 144

  x = √144 = 12

Bruce and Ruth are 12 meters apart.

Can someone help me please

Answers

Answer: B

Step-by-step explanation:

It has to be B. None of the other answers make sense.

Sarah made a certain number of bracelets for a craft show. Maria made 7 more than Sarah. Julie made 3 times as many as Maria.

Which expression represents the total number of bracelets Julie made if Sarah made s bracelets?
3s + 7
s + 21
21s
3(s + 7)

Answers

The answer is Option 4: 3(s+7)

Answer:

D

Step-by-step explanation:

A restkaurant worker is able to clean 32 dishes in 8 minutes. How many minutes would it take to clean 58 dishes?

Answers

Answer:

14.5

Step-by-step explanation:

Find the unit rate

What is 70% of 40??????

Answers

Answer:

28

Step-by-step explanation:

hope this helps

Answer:

28

Step-by-step explanation:

70% is equal to 70/100. "of" when used in math means multiplaication.

so we do 70/100 x 40

we can simplify 70/100 to get 7/10.

now we multiply:

7/10 x 40 = 28

The graph below represents one function, and the table represents a different function. How are the functions similar? How are they different?

Answers

Answer:

Step-by-step explanation:

they both go thur the point (0,-4)  so they both have the same b in the slope intercept from  of  y =mx +b

but.. they have a different slope... m , the graph has a slope m of 4/3 while the table has a slope of 1  , both positive.. :)

The equation given by the graph is y = (4/3)x - 4 while the table is y = x - 4. Both equation have a y intercept of -4.

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

From the graph, using the point (3, 0) and (0, -4):

y - 0 = [(-4 - 0)/ (0 - 3)](x - 3)

y = (4/3)x - 4

From the table using (0, -4) and (2, -2):

y - (-4) = [(-2-(-4))/(2-0)](x - 0)

y = x - 4

The equation given by the graph is y = (4/3)x - 4 while the table is y = x - 4. Both equation have a y intercept of -4.

Find out more on equation at: https://brainly.com/question/2972832

#SPJ2

The graphs below have the same shape. What is the equation of the blue
graph?
A. g(x) = (x+4)^2
b. g(x) = x^2-4
c. g(x) = x^2+4
d. g(x) = (x-4)^2

Answers

It would be (x-4)^2

It has a horizontal shift of 4 to the right

(D)  [tex]g(x)=(x-4)^{2}[/tex]

Graphs:The set of ordered pairings (display style [tex](x,y)[/tex]) of a function (display style [tex]f(x)=y[/tex]) in mathematics is known as the graph of that function. These pairs are Cartesian coordinates of points in two-dimensional space and so constitute a subset of this plane in the typical case where "display style [tex]x[/tex]" and "display style [tex]f(x)[/tex]" are real values.Graph equations:Equations with graphs as the unknowns are known as graph equations in graph theory. The concept of isomorphism is one of the key issues in graph theory. Different graph equations may be used to express the aforementioned graphs.

Therefore, the correct equation for the blue graph is [tex]g(x)=(x-4)^{2}[/tex].

Know more about the Graphs here:

https://brainly.com/question/4025726

#SPJ2

You have 3/5gallon of juice and drink 1/3 gallons how much is left

Answers

Answer:

4/15 gallons of juice

Step-by-step explanation:

Total gallon you have = 3/5gallons

Amount consumed = 1/3 gallons

Amount left = Total gallons + Amount consumed

Amount left = 3/5-1/3

Find the LCM

amount left = (3)(3)-5(1)/15

Amount left = (9-5)/15

Amount left = 4/15

Hence 4/15 gallons of juice is left

Question 7 of 25 Which of the binomials below is a factor of this trinomial? x - 6x-16 O A. X-1 O B. X-8 OC. X-16 O D. x-2​

Answers

Answer:

(x-8) is the factor.

Step-by-step explanation:

The given trinomial is [tex]x^{2}-6x-16[/tex].

We need to find the factor of this trinomial.

[tex]x^{2}-6x-16=x^2-8x+2x-16\\\\=x(x-8)+2(x-8)\\\\=(x+2)(x-8)[/tex]

The factors of [tex]x^{2}-6x-16[/tex] is (x-2) and (x-8).

So, the factor of [tex]x^{2}-6x-16[/tex] is (x-8). Hence, the correct option is (B).

when a three-dimensional figure is exended infinitely in all directions,which of the following best describes what is formed?​

Answers

Answer:

2

Step-by-step explanation:

A triangle has sides with lengths of 7 millimeters, 16 millimeters, and 18 millimeters. Is it a right triangle?

Answers

i dont think so because wouldnt be 18 and 18 or 16 and 16 like it just seems like it wouldnt be

Step-by-step explanation:

Geometry help please explain

Answers

Answer:

<A and <C

Step-by-step explanation:

If EA and EC are congruent, the angles <A and <C are also congruent

Answer:

angle A congruent to angle C

I need help, please solve this 2(x+5)^4=128

Answers

X= plus of mis of (2 square root of 2 )-5

Which expression is equivalent to 16+8?

A.2{8+4}
B.4{4+8}
C.4{4+1}
D.2{8+5}

Answers

Answer:

A

Step-by-step explanation:

What does x equal I this problem

Answers

Answer: The answer is X= 9    Hope this helps :)  Please mark Brainliest

Step-by-step explanation:

This table shows a proportional relationship between the number of cups of bananas and apples used for a smoothie.
Cups of
Bananas
Cups of Apples
1
6
2
12
4
24
Enter the number of cups of bananas used for 1 cup of apples.
cups

Answers

Answer:

For every 1 cup of banana you have to add 6 cups of apples. So it means there's six times as much apples as there is bananas. If there's 3 cups of apples, which is half of 6, it means the banana would now also have to be halved from 1 to half a cup.

Whatever you do to the bananas or the apples, you have to maintain the same ratio. Which is that apples is 6 times as much as bananas.

So 1 cup of apple would need to be divided by 6, to get banana. That would be approximately 1÷6= 0.167 cups

y=-4/7x-4
Can someone help me please

Answers

-7=x because u put the -4 on the other side and then multiply by seven to get 28=-4x divide both sides by negative four

which one is greater 0.503 or 0.53

Answers

Answer:

0.53

Step-by-step explanation:

Hope this helps.

Consider a 176lb male farmer is in 104 degree heat. On this day, the humidity is low enough such that all the sweat evaporates from the farmer's skin, enabling him to maintain a body temperature of 100 degrees. The farmer sweats 1 liter of water per hour and 60% of the latent heat needed to Evan=pirate this sweat is provided by farmer's body. If the farmer suddenly dehydrates and stops sweating, how long will it take for his body temperature to rise to the near-fatal 104 degrees.

Answers

Answer:

t = 33 seconds

It is the amount of time when the temperature of the body will rise from 100 to fatal 104 in the absence of sweat.

Step-by-step explanation:

weight of the farmer = 176 lb

Sweating = 1 litre per hour

60% of above sweating is evaporated by the latent heat from farmers body.

Temperature outside = 104

Temperature of the Farmer = 100

Time to rise the temperature 4 degrees = ?

We need to use the specific heat formula to calculate the time to rise the temperature of the body of farmer.

Before, that let's convert weight of the farmer in Kg

W = 176 lb

1 lb = 0.453592 kg

176 lb = 79.8 kg

w = mg

g = 10

mass = m = 79.8/10

mass = 7.98 kg

Q = mc∆T

c = specific heat of water =  4,186

∆T  = Temperature Change = 104-100

∆T  = 4

Q = 7.98 x 4186 x 4

Q = 133617

t = Q/P

Power of Sun's Heat = 3.846×1026

t = 33 seconds

It is the amount of time when the temperature of the body will rise from 100 to fatal 104 in the absence of sweat.

tom and tammy race cross country on motor bikes to drive 450 miles in 9 hours. Tammy took 7 1/2 hours to travel the same distance as tom compute the unit rate that describes toms average driving speed and tammy's average driving speed show how your decisions below

Answers

Answer:

50 and 60 mph respectively

Step-by-step explanation:

Step one:

given data

total distance= 450 miles

time take= 9 hours

Required

Tom and Tammy's average speed

Step two:

Tom's average speed= 450/9

= 50 miles per hours

Tammy's average speed= 450/7.5

= 60 miles per hours

The Langleys spend 40% of their monthly income on rent. If their monthly income is $4,400, how much money do the Langleys spend on rent? Help please.

Answers

100%=$4400

40% $=?

40 ×4400/100

$1760

Have no idea how to do this lok

Answers

Answer:

that hard

Step-by-step explanation:

I need that r d d d d d. D d d d d d d. D

Answers

Answer:

D is not a function.

Step-by-step explanation:

The first option is a function because it makes up a straight line.  The second option is also a function because it is also known as y = -3/2x + 2 creating a slope function.  The third option is also a function because there is no more than one point for each x value.  The last option is not a function because the number 2 is going for 2 variables A and B and you can't have them with more than one so D is your answer.

Answer:

D is not a function.

Step-by-step explanation:

The first option is a function because it makes up a straight line.  The second option is also a function because it is also known as y = -3/2x + 2 creating a slope function.  The third option is also a function because there is no more than one point for each x value.  The last option is not a function because the number 2 is going for 2 variables A and B and you can't have them with more than one so D is your answer.

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