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3 years ago

This is right or wrong, please anyone

Mathematics

2 answers:

BabaBlast [244]3 years ago

7 0

Wrong,

You added when you were supposed to divide.

24/30 = 0.8

Marina CMI [18]3 years ago

5 0

I believe the answer should be 0.8

I hope that this is right and sorry if I'm wrong

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A positive real number is 2 less than another. When 4 times the larger is added to the square of the smaller, the result is 49.

Kobotan [32]

Answer:

The numbers are

$-2+3\sqrt{5}$ and $3\sqrt{5}$

Step-by-step explanation:

Let

x -----> the smaller positive real number

y -----> the larger positive real number

we know that

A positive real number is 2 less than another

$x=y-2$

$y=x+2$ ----> equation A

When 4 times the larger is added to the square of the smaller, the result is 49

$4y+x^2=49$ ----> equation B

substitute equation A in equation B

$4(x+2)+x^2=49$

solve for x

$x^2+4x-41=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^2+4x-41=0$

$a=1\\b=4\\c=-41$

substitute in the formula

$x=\frac{-4\pm\sqrt{4^{2}-4(1)(-41)}} {2(1)}$

$x=\frac{-4\pm\sqrt{180}} {2}$

$x=\frac{-4\pm6\sqrt{5}} {2}$

$x=-2\pm3\sqrt{5}$

The positive real number is

$x=-2+3\sqrt{5}$

Find the value of y

$y=x+2$

$y=-2+3\sqrt{5}+2$

$y=3\sqrt{5}$

6 0

4 years ago

Is 5/6 closer to 1, 1/2, or 2 and why?

velikii [3]

1 because 5/6 is almost a whole. It can't be 1/2 because it would have been 3/6. And it's not 2 because it should have been an improper faction

4 0

3 years ago

Under what circumstances may a health insurer charge a higher premium to a woman with a genetic disposition to breast cancer? a)

Vladimir [108]

Answer:

D) Health insurers can never discriminate based on genetic information in this way

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3 years ago

What is the value of a in this diagram

Delicious77 [7]

What diagram people?

8 0

3 years ago

Please help me with this one

Nesterboy [21]

Answer:

240

Step-by-step explanation:

well do *

so 8x6x5 = 240 there's your answer

3 0

3 years ago

Read 2 more answers