3 years ago

EDGE 2020

Mathematics

1 answer:

Kitty [74]3 years ago

6 0

Answer:

arcos x and arcsec x have the same maxiumum

Step-by-step explanation:

just took the quiz on edge

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Help on this math questions please!

padilas [110]

Answer:

$y = - 3 {x}^{2} ( {x}^{2} + 8x + 15) = \\ =- 3 {x}^{2} ( (x + 3)(x + 5)) \\ roots \\ 0 \\ - 3 \\ - 5$

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3 years ago

You are going to add a 15% tip to your bill. If the meal cost you $13.80, what is your tip amount? *

NNADVOKAT [17]

Answer: 15% of 13.80 = 1.95

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3 years ago

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A number is 6 times another number and their difference is 30. What are the numbers?

Alenkasestr [34]

Answer:

x=36

y=6

Step-by-step explanation:

Let the numbers be x and y

Condition 1

x=6y ----------(1)

Condition 2

x-y=30 ------------(2)

Putting 1 in 2

6y-y=30

5y=30

Dividing both sides by 5

y=6

Now

Putting y=6 in 1

We get

x=6(6)

x=36

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3 years ago

How to show the ratio 3:8 is equal to 12:32

Agata [3.3K]

12:32 is simply 3:8 but divided by 4 to both sides.

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3 years ago

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A ladder that is 13 meters long is leaning against a wall. The distance between the foot of the ladder and the wall is 7 meters

Maksim231197 [3]

<h2>Answer:</h2>

The equation that is used to model the length of ladder in terms of x is:

$x^2-7x-60=0$

<h2>Step-by-step explanation:</h2>

We can model this problem with the help of a right angled triangle whose hypotenuse is 13 meters and the other two legs are x meters and (x-7) meters.

where x is the distance between the top of the ladder and the ground.

and (x-7) is the distance between the foot of the ladder and the wall.

Hence, using Pythagorean Theorem we have:

$13^2=x^2+(x-7)^2\\\\i.e.\\\\169=x^2+x^2+49-14x\\\\i.e.\\\\169=2x^2-14x+49\\\\i.e.\\\\2x^2-14x+49-169=0\\\\i.e.\\\\2x^2-14x-120=0\\\\i.e.\\\\x^2-7x-60=0$

Hence, the answer is:

$x^2-7x-60=0$

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3 years ago

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