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2 years ago

A car speeds up from 8.50 m/s to

1 answer:

4 0

First we need to subtract 8.50 from 22.2 we get 13.7. Then once we divide 13.7 by 3.84 we get 3.57. Which should be the answer.

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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

Someone please help me PLEASE. <br> With explanations.

Nadusha1986 [10]

Answer:

hlo

buddy

msg me on

navneet175285

Step-by-step explanation:

njkmmnu

3 0

2 years ago

The map shows a typical flight path between Seattle and London. Why does the path go over the Arctic? A) It is the shortest path

Triss [41]

The answer to the given question above would be option A. Based on the given map shown above which is a typical flight path between Seattle and London, the reason why the path goes over the Arctic is that, it is the shortest path. Hope this answers your question.

4 0

3 years ago

Read 2 more answers

What is the area of the figure? Round to the nearest tenth.

diamong [38]

Answer:

14.0 cm its a

Step-by-step explanation:

5 0

3 years ago

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What is 50 x 79 x 27 + 69