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Brilliant_brown [7]

2 years ago

7

Mark got 54 out of 66 in his maths test how many did he get wrong. Give your answer in its simplest form

1 answer:

alex41 [277]2 years ago

5 0

Answer:

9/11 I think!

Step-by-step explanation:

54/66= 9/11

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What is 45.3*4 equal please help me

xz_007 [3.2K]

Answer:

45.3 times 4 equals 181.2

Step-by-step explanation:

3 0

2 years ago

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Does the point (-4, 2) lie inside or outside or on the circle x^2 + y^2 = 25?

d1i1m1o1n [39]

Given equation of the Circle is ,

$\sf\implies x^2 + y^2 = 25$

And we need to tell that whether the point (-4,2) lies inside or outside the circle. On converting the equation into Standard form and determinimg the centre of the circle as ,

$\sf\implies (x-0)^2 +( y-0)^2 = 5 ^2$

Here we can say that ,

• Radius = 5 units

• Centre = (0,0)

Finding distance between the two points :-

$\sf\implies Distance = \sqrt{ (0+4)^2+(2-0)^2} \\\\\sf\implies Distance = \sqrt{ 16 + 4 } \\\\\sf\implies Distance =\sqrt{20}\\\\\sf\implies\red{ Distance = 4.47 }$

Here we can see that the distance of point from centre is less than the radius.

Hence the point lies within the circle .

4 0

2 years ago

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8 times the quantity d minus 3

Sphinxa [80]

8d-3 if youre asking for how that should be written. if not, i dont understand the question.

8 0

3 years ago

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1. What is the solution to the inequality?

Oksanka [162]

we are given

$-\frac{2}{3} (2x-\frac{1}{2}) \leq\frac{1}{5}x-1$

Since, we have to solve this inequality

so, we will isolate x on anyone side

step-1:

Multiply both sides by 3/2

$\frac{3}{2}\times-\frac{2}{3}(2x-\frac{1}{2})\leq\frac{3}{2}\times(\frac{1}{5}x-1)$

$-(2x-\frac{1}{2})\leq\frac{3}{2}\times\frac{1}{5}x-\frac{3}{2}\times 1$

$-(2x-\frac{1}{2}) \leq\frac{3}{10}x-\frac{3}{2}$

step-2:

Distribute negative sign

$-2x+\frac{1}{2} \leq\frac{3}{10}x-\frac{3}{2}$

step-3:

Subtract both sides by 1/2

$-2x+\frac{1}{2}-\frac{1}{2} \leq\frac{3}{10}x-\frac{3}{2}-\frac{1}{2}$

$-2x \leq\frac{3}{10}x-2$

step-4:

Subtract both sides by (3/10)x

$-2x-\frac{3}{10}x \leq\frac{3}{10}x-2-\frac{3}{10}x$

$-2x-\frac{3}{10}x \leq-2$

$-\frac{23}{10}x \leq-2$

step-5:

Multiply by sides by -10/23

$-\frac{10}{23}\times -\frac{23}{10}x \geq-\frac{10}{23}\times-2$

now, we can simplify it

$x \geq\frac{20}{23}$

now, we can write in interval notation as

$[\frac{20}{23},\:\infty \:)$ ................Answer

3 0

3 years ago

Pls help!!<br><br><br> need ur help math geniuses help with my last question!<br><br><br><br> ty

Shtirlitz [24]

The expected value of the discrete distribution is of 20.97, hence option C gives the correct answer.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability.</u>

Hence, according to the table, the expected value is given by:

E(X) = 12 x 0.08 + 18 x 0.15 + 20 x 0.31 + 22 x 0.08 + 24 x 0.15 + 25 x 0.23 = 20.97.

More can be learned about the expected value of a discrete distribution at brainly.com/question/26660401

#SPJ1

7 0

1 year ago