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3 years ago

Four swimmers are chosen to swim in a relay race. How many orders of the 4 swimmers are

Mathematics

2 answers:

Drupady [299]3 years ago

8 0

Answer:

Step-by-step explanation:

..............................

MakcuM [25]3 years ago

7 0

Answer:

Step-by-step explanation:

You take the amount of swimmers, which is 4, and then you put it to an exponent of 4 since there are four people in a line, thus giving you the answer of 64 possibilities.

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Marcia biked 600 meters on friday. On saturday, she biked 3 kilometers. One sunday she biked 2 kilometers and 700 meters. How ma

zepelin [54]

Answer:

6.3 km.

Step-by-step explanation:

The question asks for kilometers, so all amounts have to be calculated in the same units -- kilometers.

Convert meters to kilometers.

600 m = .6 km

700 m = .7 km.

Add the amounts:

Fri.: .6 km

Sat. 3 km

Sun.: 2.7 km.

--------------------------------

6.3 km.

6 0

3 years ago

For what values of a does the equation a+x= 1+xa^2 have no solution?

Anton [14]

Answer:

We have the equation

$a+x= 1+xa^2$

we leave the terms with x on the left side of the equation and the independent terms on the right side.

$x-xa^2=1-a\\(1-a^2)x=1-a\\$

resolving for x we have that

$x=\frac{1-a}{1-a^2}$

Since we need that the equation doesn't have solution, then it is necessary that the denominator of x be 0 and this occur when $1-a^2=0\\1=a^2\\a=\pm1$

Then, for $a=\pm1$ the equation hasn't solution

7 0

3 years ago

A diver descend 15 feet below sea level. She then ascends 7 feet. What is the depth of the diver in terms of sea level

Angelina_Jolie [31]

8 feet below sea level because -15+7=-8

5 0

3 years ago

How do I work out this problem?

cluponka [151]

First we need to find ∡PRQ. To do this we can use the fact that the sum of the interior angles of a triangle is 180°:

$180=R+P+Q$
$180=R+40+105$
$180=R+145$
$R=180-145$
$R=35$

Now, we can use the fact that a strait line (like SRQ) is also 180°:
$SRQ=180-R$
$SRQ=180-35$
$SRQ=145$ °

4 0

3 years ago

What does X equal. -356 = -77 -9x This is grade 7 math.

LuckyWell [14K]

Answer:

<h2> x = 2.82 (approx.)</h2>

Step-by-step explanation:

Given, 

- 356 = -77 - 99x

=> -77 - 99x = -356

=> -99x = -356 + 77

=> -99x = -279

$= > x = \frac{ - 279}{ - 99}$

=> x = 2.8181....

=> x = 2.82 (approx.) (Ans)

7 0

3 years ago