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3 years ago

15

Can someone solve this pls???

2 answers:

soldier1979 [14.2K]3 years ago

8 0

Answer:

i think is( C.) distance and speed

hoped i helped

ra1l [238]3 years ago

4 0

I’m pretty sure it’s B because if you look at the chart it says time and distance

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Find the volume of the composite figure below round your answer to the nearest whole number

Anettt [7]

Answer:

1017in^3

Step-by-step explanation:

7 0

3 years ago

C+(4-3c)-2=0<br> Need help

Illusion [34]

$c+(4-3c)-2=0\\ \\c+ 4-3c -2=0\\ \\c-3c=2-4\\ \\-2c=-2 \ \ /:(-2)\\\\c=1$

6 0

3 years ago

Problems 2.21, 2.22, 2.23

RoseWind [281]

Statements can be proved by contrapositive, contradiction or by induction.

<em>2.21 and 2.23 are proved by contrapositive</em>
<em>2.22 is proved by induction</em>

<u />

<u />

<u>2.21: If </u> $n^3$ <u> is even, then n is even (By contrapositive)</u>

The contrapositive of the above statement is that:

<em>If n is odd, then </em> $n^3$ <em> is odd</em>

Represent the value of n as:

$n = 2k + 1$ , where $k \ge 0$

Take the cube of both sides

$n^3 = (2k + 1)^3$

Expand

$n^3 = 8k^3 + 6k^2 + 6k + 1$

Group

$n^3 =[ 8k^3 + 6k^2 + 6k] + 1$

Factor out 2

$n^3 =2[4k^3 + 3k^2 + 3k] + 1$

Assume w is an integer; where:

$w =4k^3 + 3k^2 + 3k$

So, we have:

$n^3 =2w + 1$

The constant term (i.e. 1) means that $n^3$ is odd.

Hence, the statement has been proved by contrapositive.

<em>i.e. If n is odd, then </em> $n^3$ <em> is odd</em>

<u />

<u>2.22 </u> $3n + 4$ <u> is even, if and only if n is even</u>

We have: $3n + 4$ <u />

<u />

Assume that: $n = 2k + 2$ for $k \ge 0$

So, we have:

$3n + 4 = 3(2k + 2) + 4$

Open bracket

$3n + 4 = 6k + 6 + 4$

$3n + 4 = 6k + 10$

Factorize

$3n + 4 = 2(3k + 5)$

The factor of 2 means that $3n + 4$ is even.

<em>Hence, </em> $3n + 4$ <em> is even, if and only if n is even </em>

<em />

<u />

<u>2.22: </u> $s \ne -1$ <u> and </u> $t \ne -1$ <u>, then </u> $s + t + st \ne -1$ <u />

To do this, we prove by contrapositive.

The contrapositive of the above statement is:

If $s = -1$ and $t=-1$ , then $s + t + st = -1$

We have:

$s + t + st = -1$

Substitute the values of s and t in: $s + t + st = -1$

$-1 -1 -1 \times -1 = -1$

$-1 -1 + 1 = -1$

$-1 = -1$

Hence, by contrapositive:

If $s = -1$ and $t=-1$ , then $s + t + st = -1$

Read more about proofs at:

brainly.com/question/19643658

7 0

3 years ago

Solve this equation using the quadratic formula (preferably): 3x^2 - 4x + 6 = 0

Readme [11.4K]

Answer:

x = 2/3 ± i√14/3

Step-by-step explanation:

5 0

3 years ago

A little bit of help please? tysvm!

matrenka [14]

Answer:

A= 16 quarts B=1 gallon

Step-by-step explanation:

There are 4 quarts to a gallon BTW. So he would have 3 more gallons left.

Hope this helps! If so can you please mark me the brainliest?

Peace and Love

8 0

2 years ago