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3 years ago

2x(z+4)+1-z+xy; x=4, y=2, z=-3

Mathematics

2 answers:

Marina CMI [18]3 years ago

6 0

Answer:

=20

Step-by-step explanation:

in pic

(hope this helps can I pls have brainlist (crown) ☺️)

Arte-miy333 [17]3 years ago

5 0

$\huge\text{Hey there!}$

<h2> $\large\textsf{2x(z + 4) + 1 - z + xy}$ </h2><h2> $\large\text{= 2(4)(-3 + 4) + 1 - (-3) + 4(2)}$ </h2><h2> $\large\text{= 8(1) + 1 - (-3) + 4(2)}$ </h2><h2> $\large\text{= 8 + 1 - (-3) + 4(2)}$ </h2><h2> $\large\text{= 9 - (-3) + 4(2)}$ </h2><h2> $\large\text{= 12 + 4(2)}$ </h2><h2> $\large\text{= 12 + 8}$ </h2><h2> $\large\text{= 20}$ </h2><h2 /><h3> $\large\boxed{\textsf{Therefore, your answer is: \rm{20}}}\huge\checkmark$ </h3><h3> $\mathsf{Good \ luck \ on \ your \ assignment \ and \ enjoy \ your \ day!}$ </h3><h3 /><h3> $\frak{Amphitrite1040:)}$ </h3>

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A department store, on average, has daily sales of $28 comma 286.28. The standard deviation of sales is $1 comma 500. On Tu

wolverine [178]

Answer:

z-score = 4.43,

It is a Good day

Step-by-step explanation:

The provided information is:

Mean = $28,286.28

Standard deviation = $1,500

Let x be the sell of department store on Tuesday.

Then, x = $34,924.62

The z-score is define as:

$z=\dfrac{x-\mu}{\sigma}\\\\=\dfrac{34924.62-28286.28}{1500}\\\\=4.43$

Thus, the Tuesday's z-score is 4.43. So this is usually good day.

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3 years ago

A motorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. What is the speed of the

aleksklad [387]

R = speed in still water
r + c = speed with current
r - c = speed against current

3.5(r + c) = 70
r + c = 20
c = 20 - r

4(r + c) = distance from pier to pier
5(r - c) = distance from pier to pier
4(r + c) = 5(r - c)
4(r + 20 - r) = 5(r - 20 + r)
80 = 10r - 100
180 = 10r
18 = r
The speed in still water is 18 km/hour

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3 years ago

I need help please?!!!

Rina8888 [55]

Answer:

Step-by-step explanation:

To find out if the ordered pair is a solution, just plug x and y into the equation. Is 5(1) + (3) equal to or less than -3? No, it equals 8, which is greater than -3. So the answer is No.

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3 years ago

Read 2 more answers

Which of the following describes the probability distribution below?

7nadin3 [17]

Answer:

Answer: A.) The mean is greater than the median, and the majority of the data points are to the left of the mean.

It is clear that most of the data (around 75%) is consist of value 1, which is the leftmost part of the data. Since it was more than 50% of the data, the median should be 1.

if 75% data is 1, it need 25% data with value at least 5 to make the means equal to 2. The means would be bigger than 1 but less than 2, so most(75% data is 1) of the data would be on the left of the mean.

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3 years ago

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a farmer sells his corn for $230 a metric ton with a small surcharge of $25. his neighbor sells her corn for $230 a metric ton a

anyanavicka [17]

Step-by-step explanation:

Step one:

The farmer sells his corn for $230 a metric ton

small surcharge = $25.

let the amount per metric ton be x

and let the total cost per x metric ton be y

the total cost function is

y=230x+25--------------1

The neighbor sells her corn for $230 a metric ton

he gives $15 rebate------<em>A rebate is a partial refund of the cost of an item</em>

let the amount per metric ton be x

and let the total cost per x metric ton be y

the total cost function is

y=230x-15----------------2

Step two:

Equating the two equation above

230x+25=230x-15

230x-230x=25+15

0=40

The result shows that based on the cost function of both farmer, there will never be an amount of corn that would make them have the same cost

4 0

3 years ago