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3 years ago

I need help with this question to me it’s kinda hard

Mathematics

2 answers:

lorasvet [3.4K]3 years ago

7 0

What's the question?

Bingel [31]3 years ago

5 0

We need the question to help you!

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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

3 years ago

0.2x + 0.3y = 0.5 need help plzz

krok68 [10]

Answer:

y = − 0. 6 x + 1.6

Step-by-step explanation:

Write in slope-intercept form,

y = m x + b

Note:

The decimals (0.6) and (1.6) ARE repeating...

If you need any other form of working it out let me know!

Glad I could help!!

6 0

3 years ago

Help me with question plz

rewona [7]

Answer:

Step-by-step explanation:

What I did was I took 180, 85 and 54 and subtracted them to get 41 if it is wrong i am so very sorry

7 0

3 years ago

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What is the slope of this line?

Anvisha [2.4K]

(-4,5),(0,6)

slope = rise/run
tip... you have to crawl (run) before you run (rise) .

you can use the slope formula
$\frac{5 - 6}{ - 4 - 0} = \frac{ - 1}{ - 4} = \frac{1}{4}$
1/4

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3 years ago

Out of 200 students, 10 had a cleft chin.<br> What percent of students had a cleft chin?

Illusion [34]

Answer:

chin

Step-by-step explanation:

stan kim namjoon for good grades and clear skin

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3 years ago

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