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2 years ago

(3x - 5) + (5x + 1) Simplify it in polynomials

Mathematics

2 answers:

Nady [450]2 years ago

4 0

Answer: The answer is = 8x-4

Step-by-step explanation:

Vera_Pavlovna [14]2 years ago

3 0

<h2><u>Answer:</u></h2><h2> $\boxed{\boxed{\sf{8x-4}}}$ </h2><h2 /><h2><u>Solution Steps:</u></h2>

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<h3>1.) Combine 3x and 5x:</h3>

$3x+5x=8x$

<em> - When there is more then 1 variable then you must combine them, (If possible.) In this case we have 2 variables, so to combine them you just have to add them together. </em>

<u>Equation at the end of Step 1:</u>

$8x-5+1$

$-5+1=-4$

<em> - We do this because we need to get to 1 leftover number. So to do this, you just subtract/add the numbers by each other. In this case we have to add -5 by 1.</em>

So your answer is $\bold{8x-4}$ .

<h3 />

______________________________

<h3 />

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Darius wants to purchase his favorite salad dressing. The salad dressing comes in two different size bottles. The 16 ounce bottl

Leya [2.2K]

<u>Answer:</u>

The correct answer option is b. Darius will get the better deal buying one 16 ounce bottle.

<u>Step-by-step explanation:</u>

We know that a 16 ounce bottle of the salad dressing is for $3.36 while a 10 ounce bottle is priced at $2.30.

Darius has a coupon for 40 cents off if he buys two 10 ounce bottles. We are to determine what is the better buy.

Price of one 16 ounce bottle = $3.36

Price of two 10 ounce bottles = (2.30 × 2) - 0.4 = $4.2

Therefore, Darius will get the better deal buying one 16 ounce bottle.

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3 years ago

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The following list details the numbers of tickets sold for a talent show grade 9:22; grade 10:32; grade 11: 41; and grade 12:30.

Montano1993 [528]

Answer: C. domain: {9, 10, 11, 12); range: (22, 32, 41, 30)

Step-by-step explanation:

The data set is:

(9, 22)

(10,32)

(11, 41)

(12, 30).

In the usual notation, the number at the left is the input (belons to the domain) and the number in the right is the output (belongs to the range).

Then the domain would be:

{9, 10, 11, 12}

and the range:

{22, 32, 41, 30}

The correct option is C

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3 years ago

I really need help please

andrew11 [14]

Answer:look at step by step

Step-by-step explanation:how do I post questions and I’ll help you

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3 years ago

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Please help will mark brainliest

Lynna [10]

Z^5/8

You can tell this because exponents get added together when multiplying and the fact that the fraction goes down by a multiple of 1/8.

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3 years ago

5. Suppose that a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organ

mart [117]

Answer:

Probability that the sample proportion will be greater than 0.5 is 0.8133.

Step-by-step explanation:

We are given that the a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organization is about to take a simple random sample of voters and will use the sample proportion to estimate p.

Suppose that the polling organization takes a simple random sample of 500 voters.

<em>Let </em> $\hat p$ <em> = sample proportion</em>

The z-score probability distribution for sample proportion is given by;

Z = $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion

p = population proportion = 48%

n = sample of voters = 500

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, probability that the sample proportion will be greater than 0.5 is given by = P( $\hat p$ > 0.50)

P( $\hat p$ > 0.50) = P( $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < $\frac{0.50-0.48}{\sqrt{\frac{0.50(1-0.50)}{500} } }$ ) = P(Z < 0.89) = 0.8133

<em>Now, in the z table the P(Z </em> $\leq$ <em> x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 0.89 in the z table which has an area of 0.8133.</em>

Therefore, probability that the sample proportion will be greater than 0.50 is 0.8133.

6 0

3 years ago