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3 years ago

Wasdwasdwasdwasdwasdwasdwasdwasd

Mathematics

2 answers:

marshall27 [118]3 years ago

7 0

Answer:

Thx for points

Step-by-step explanation:

Oliga [24]3 years ago

6 0

Answer:

aukrfgauvkauvbafgvaaw

Step-by-step explanation:

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Nakeisha has 42 m of fencing to build a four-sided fence around a rectangular plot of land. The area of the land is 110 square m

Maurinko [17]

Answer:

length=11 width=10

Step-by-step explanation:

Create two equations with length(l) and breath(w) as our unknowns

2l+2w=42

2l=42-2w

2l/2=(42-2w)/2

l=21-w(equation 1)

lxw=110

lw=110

Substitute equation one into equation two

(21-w)w=110

21w-w²=110

Write your equations in standard quadratic form

0=w²-21w+110

solve this as a quadriatic tri nominal

0=(w-10)(w-11)

0=w-10. or 0=w-11

10=W. 11=L

5 0

2 years ago

John is giving out chocolate to his friends. If he wants to give each friend 23

ruslelena [56]

Answer:

299

Step-by-step explanation:

23x13 = 299

8 0

3 years ago

Randy is walking home from school. According to the diagram above, what is his total distance from school to home? Show your wor

In-s [12.5K]

Answer:

First, when he walks, we can see in the image that between the school and his house he must walk 4 times a distance of 0.5km, so this is a total of 4¨*0.5km = 2km.

Then he needs to walk 2km.

Now if he has a jet-pack, he can ignore the buildings and just take the shorter path, here we can draw a triangle rectangle, in such a way that the hypotenuse of this triangle is the distance between the home and the school.

One of the catheti is the vertical distance (two blocks of 0.5km, so this catheti has a length of 2*0.5km = 1km), and the other one is the horizontal distance, also 1km.

The actual distance of this path is given by the Pythagorean's theorem:

A^2 + B^2 = H^2

Where A and B are the cathetus, and H is the hypotenuse, then:

H^2 = 1km^2 + 1km^2

H = (√2)km = 1.41km.

Now, in the case that he has a jet-pack, he can actually go to the school using this hypotenuse line as his path, in this case the distance and the displacement would be the same.

This is because the definitions of distance and displacement are:

Distance: "how much ground an object has covered"

Displacement: "Difference between the final position and the initial position"

When he walks, the distance is 2km and the displacement is 1.41km , but when he uses the jet pack, the distance is equal to the displacement, both are 1.41km.

7 0

4 years ago

The number n of people using the elevator in an office building every hour is given by n = t2 − 10t + 40. In this equation, t is

Morgarella [4.7K]

Answer:

The number of persons using the elevator at any hour is never going to be less that 15.

Step-by-step explanation:

To solves this you have to suppose that there are at least 15 persons on the elevator, and the equation is converted into an inequation:

$t^2-10t+40$

Now you transform the inequation back to an equation to solve it:

$t^2-10t+25=0$

You need to know if there is any negative solution for the equation, to do this you can use the discriminant for a quadratic equation:

$D=b^2-4ac$

In this case, you have a=1, b=-10, c=25

$D= (-10)^2-4(1)(25)\\D=0$

Since the discriminant is 0 and a<0 the equation always is going to be positive. Therefore, the number of persons using the elevator at any hour is never going to be less than 15.

6 0

4 years ago

Trent saved up $500 for summer vacation if he spends $25 a week for 8 weeks how much money does he have left from his savings

Lady bird [3.3K]

He has 300 dollars left

7 0

4 years ago

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