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2 years ago

What percent is 19 out of 20

Mathematics

1 answer:

Katen [24]2 years ago

7 0

The answer is 95% because 19/20 equals 0.95 and 0.95*100 equals 95%

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Rule for X-5,6,7,8 Y-20,24,28,32. What is rule for Y?

Lina20 [59]

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2 years ago

Read 2 more answers

Factorise <br> 84xy+196x-36y-84

LenaWriter [7]

Hi,

84xy+196x-36y-84

4(21xy+49x-9y-21)

4(7x × (3y+7)-9y-21)

4(7x × (3y+7)-3(3y+7)

4(3y+7)×(7x-3)

4 0

2 years ago

how do you know if your anwser in absolut value is extranious after you plug it back into the equation?

Ivanshal [37]

If an number is an absolute value, it means that the number will be positive. You would plug and check the same way you would for any other equation and it a solution is considered extraneous if the equation is not equal

4 0

2 years ago

Solve the equation Axb by using the LU factorization given for A. Also solve Axb by ordinary row reduction. A , b Let Lyb and U

bulgar [2K]

Answer: Hello your question is poorly written attached below is the complete question

answer:

$y = \left[\begin{array}{ccc}-4\\-11\\5\end{array}\right]$

$x = \left[\begin{array}{ccc}16\\12\\-40\end{array}\right]$

Step-by-step explanation:

$y = \left[\begin{array}{ccc}-4\\-11\\5\end{array}\right]$

$x = \left[\begin{array}{ccc}16\\12\\-40\end{array}\right]$

attached below is the detailed solution using LU factorization

6 0

2 years ago

The height

andre [41]

The ball describes a parabola, as you can see in the attached picture. So, the point where the ball strike the ground is the point where the parabola meets the x axis. In fact, the x-axis is the set of points where y=0, which means that the ball has height 0 or -again- it hits the ground.

So, we have to set y=0 in our equation and look for the positive solution. We have

$-\dfrac{1}{14}x^2+6x+3=0 \iff x=42\pm\sqrt{1806}$

And the positive solution is

$42+\sqrt{1806}$

So that's the distance from the child where the ball strikes the ground.

6 0

2 years ago