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3 years ago

Three swimmers competed in a 50 m freestyle race. A description of their swimming speeds is given. Order the

Mathematics

1 answer:

shtirl [24]3 years ago

4 0

What are the descriptions???

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Rate of change (0,0) and (5,5)

Tatiana [17]

The rate of change is 1.
Use the slope formula 5 - 0 is the rise and 5 - 0 is the run
5/5 = 1

7 0

3 years ago

Which are the roots of the quadratic function f(b) = 62 – 75? Select two options.

elena55 [62]

Answer:

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

Step-by-step explanation:

Given

$f(b) = b^2 - 75$

Required

Determine the roots

To get the root of the function, then f(b) must be 0;

i.e. f(b) = 0

So, the expression becomes

$0 = b^2 - 75$

Add 75 to both sides

$75 + 0 = b^2 - 75 + 75$

$75 = b^2$

Take square roots of both sides

$\sqrt{75} = \sqrt{b^2}$

$\sqrt{75} = b$

Reorder

$b = \sqrt{75}$

Expand 75 as a product of 25 and 3

$b = \sqrt{25*3}$

Split the expression

$b = \sqrt{25} *\sqrt{3}$

$b = \±5 *\sqrt{3}$

$b = \±5 \sqrt{3}$

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

The options are not clear enough; however the roots of the equation are $b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

4 0

3 years ago

Without solving it, determine the nature of the roots of this equation:

ycow [4]

<h2>Answer:</h2>

x = 1, -4

Step-by-step explanation:

Find the roots of x:

2 + 3

x − 4 = 0 by solving for x

6 0

3 years ago

What is D to the secind power plus 8D plus 7

Feliz [49]

It matters what D is.
the way to do it is like 8 to the third power th math is:
8 times 8=64
8 times 64=512
8 times 512=4096
3 times

7 0

3 years ago

What is 120/3 x 19-X/6?

vodka [1.7K]

Answer:

-1/6 x + 760 or 760 - x/6

Step-by-step explanation:

Simplify each term.

120/3 (19) - x/6 = 760 + - 1/6 or 760 + x/6

6 0

3 years ago