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2 years ago

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WILL GIVE BRAINLEST, PLEASE ANSWER QUICKLY!!!

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LiRa [457]2 years ago

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It is D good luck!!!!!!

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A bag of carrots decrease from $2.99 to $2.07. what is the percent of increase

posledela

Answer:

-69%

Step-by-step explanation:

1) Make Your Equation: 2.99x=2.07

2) Divide Each Side By 2.99: $\frac{2.99x}{2.99} =\frac{2.07}{2.99}$ =0.69

3) Make 0.69 A Percent: 69%

4) But Since It Is Decreasing Make It Negative: -69%

4 0

3 years ago

At the grocery store, Sunil buys 5 pounds of chicken breast for $1.59 per pound. He also buys a jar of tomato sauce that costs $

egoroff_w [7]

Answer:

$8.07

Step-by-step explanation:

20-((5*1.59)+3.98)=8.07

8 0

3 years ago

Read 2 more answers

What is the slope of this line enter your answer as a fraction in simplest form

Umnica [9.8K]

Answer:

slope is -1

Step-by-step explanation:

5 0

3 years ago

What ia the rate of change of y=3/2x+9

Ierofanga [76]

Your rate of change is 3/2.. It will always be the coefficient of 'x'

3 0

3 years ago

Read 2 more answers

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