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Masteriza [31]
1 year ago
7

The quadratic function y = -10x2 + 160x - 430 models a store's daily profit (y), in dollars, for selling T-shirts priced at x do

llars.
A. the daily profit the company would make from the T-shirts if it gave the T-shirts away for free

B. the greatest daily profit the company could make from selling the T-shirts

C. a selling price that would result in the company making no profit from the T-shirts

D. the selling price that would result in the company making the greatest daily profit from the T-shirts

Match each item with what it represents in this situation by entering the appropriate letter in each box.


x-coordinate of the vertex of the function


y-coordinate of the vertex of the function


an x-intercept of the function


a y-intercept of the function
Mathematics
1 answer:
alexdok [17]1 year ago
8 0

Answer:

D,B,C,A

Step-by-step explanation:

Look at the picture

:)

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Given the vectors, a=3i+4j, b=-2i+5j, c=10i-j, d=-1/3i+5/2j, find -0.4a-0.3b+0.2d=?
sveta [45]

Answer:

-\frac{2}{3}i - \frac{13}{5}j

Step-by-step explanation:

-0.4(3i + 4i) - 0.3(-2i + 5j) + 0.2(-\frac{1}{3}i + \frac{5}{2}j)

-1.2i - 1.6j + 0.6i - 1.5j - \frac{0.2}{3}i + 0.5j

Converting to fraction form;

-\frac{6}{5}i + \frac{3}{5}i - \frac{1}{15}i - \frac{8}{5}j - \frac{3}{2}j + \frac{1}{2} j

<u>Solving the i part;</u>

\frac{-18i + 9i - i}{15} = -\frac{2}{3}i

<u>Solving the j part;</u>

\frac{-16j-15j+5j}{10} = -\frac{13}{5}j

So -0.4a - o.3b + 0.2d =  -\frac{2}{3}i - \frac{13}{5}j

6 0
2 years ago
For every one litre of water used to make medicine, 150 ml of sucrose and 600 ml of saline solution is used. Express the amount
dolphi86 [110]

Answer: 20 : 3 : 12

Step-by-step explanation:

For every 1 litre, 150 ml of sucrose and 600ml of saline solution is needed.

1litre = 1,000 ml

Water = 1,000 ml

Ratio:

1,000 : 150 : 600

Divide by 50 to get simplest form:

20 : 3 : 12

5 0
2 years ago
The following table shows the number of miles a hiker walked on a trail each day for 6 days.
dedylja [7]

Answer:

i think the answer is either E. or B. i'm not sure if i'm right but if someone can correct me if i'm wrong .

Step-by-step explanation:

6 0
2 years ago
Write the polynomial as a product: mn − mk + xk − xn
lubasha [3.4K]

Answer:

m-x(n)+x-m(k)

Step-by-step explanation:

mn-mk+xk-xn

mn-xn+xk-mk

m-x(n)+x-m(k)

Hope it helps <3 :)

6 0
2 years ago
The size of fish is very important to commercial fishing. A study conducted in 2012 found the length of Atlantic cod caught in n
devlian [24]

Answer:

The length of the longest 15% of Atlantic cod in this area is 53.79cm, roundeed to 2 decimal places.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by

Z = \frac{X - \mu}{\sigma}

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X.

In this problem, we have that:

A study conducted in 2012 found the length of Atlantic cod caught in nets in Karlskrona to have a mean of 49.9 cm and a standard deviation of 3.74 cm, so \mu = 49.9, \sigma = 3.74.

What is the length in cm of the longest 15% of Atlantic cod in this area?

We have to find the value of X for the value of Z that has a pvalue of 0.85.

Looking at the zscore table, we have that Z = 1.04 has a pvalue of 0.8508. So, we have to find the value of X when Z = 1.04, \mu = 49.9, \sigma = 3.74.

So

Z = \frac{X - \mu}{\sigma}

1.04 = \frac{X - 49.9}{3.74}

X - 49.9 = 3.8896

X = 53.7896

The length of the longest 15% of Atlantic cod in this area is 53.79cm, roundeed to 2 decimal places.

8 0
2 years ago
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