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Naily [24]
3 years ago
7

A computer store decides to increase the prices of all the items it sells by 15%. The store manager uses matrices to prepare the

new price list. Matrix A contains the unit price of each product in each category. Matrix B contains the revised price of each item in each category. How can the manager obtain the entries for Matrix B?
Mathematics
1 answer:
Nitella [24]3 years ago
4 0
The manager could perform scalar multiplication on Matrix A, using the scalar 1.15.

Increasing the price by 15% would mean we are taking 100% of the value + another 15%; 100+15 = 115%; 115% = 115/100 = 1.15.

Multiplying every value in Matrix A by 1.15 will give the price raised by 15%.
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On a coordinate plane, a line is drawn from point a to point b. point a is at (7, negative 2) and point b is at (negative 8, neg
dimaraw [331]

The coordinate of the partition c on the line segment is (1.2, -4.7)

<h3>How to determine the coordinates of the partition?</h3>

The coordinates are given as:

A = (7,-2)

B = (-8,-9)

m:n = 5:8

The coordinate of the partition is calculated using:

(x,y) = \frac{1}{m + n} * (mx_2 + nx_1, my_2 + ny_1)

So, we have:

(x,y) = \frac{1}{5 + 8} * (5 * -8 + 8 * 7, 5 * -9 + 8 * -2)

Evaluate the sum and products

(x,y) = \frac{1}{13} * (16, -61)

Evaluate the product

(x,y) = (1.2, -4.7)

Hence, the coordinate of the partition on the line segment is (1.2, -4.7)

Read more about line segment ratios at:

brainly.com/question/12959377

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8 0
2 years ago
Read 2 more answers
Help! Need by 10:30 to turn in and I'm confused!
Alecsey [184]

Answer:

8 boxes of tissues

5 bags of cough drops

Step-by-step explanation:

You need to write a system of equations.

x = number of tissue boxes

y = number of cough drop bags

x (number of tissue boxes) + y (number of cough drop bags) = 13 (total number of tissues and cough drops combined.

So, your first equation is

x + y = 13

Then, you need to write the second equation.

(1.69 [cost of 1 tissue box] * [number of tissue boxes]) + (1.19 [cost of one bag of cough drops] * [number of cough drop bags] = 19.47 [total cost of tissues and cough drops]

That's a lot to read, so here's the equation simplified!

1.69x + 1.19y = 19.47

Now, you have two equations:

x + y = 13

1.69x + 1.19y = 19.47

I would solve with the substitution method.

the first equation can be changed to x = 13 - y by subtracting y from both sides.

Then, your two equations are:

x = 13 - y

1.69x + 1.19y = 19.47

Now, you can plug in that value of x into the second equation!

1.69(13 - y) + 1.19y = 19.47

21.97 - 1.69y + 1.19y = 19.47

subtract 21.97 from both sides

-1.69y + 1.19y = -2.5

Add the y values

-0.5y = -2.5

divide both sides by -0.5

so, y equals 5 bags of cough drops

now that you know what y equals, plug it back into your original equation to find x!

x + y = 13

plug in y

x + 5 = 13

x = 8

so, x = 8 boxes of tissues

Hope this helps! Let me know if you have any questions!

8 0
3 years ago
Becky bought a magazine for $3.90, and the sales tax was 8.25%. How much sales tax did Becky pay on the magazine?
igor_vitrenko [27]

Answer:

32 cents

Step-by-step explanation:

Find 8.25 percent of 3.90:

0.0825*3.90 = 0.32

3 0
3 years ago
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Need help on these two!!
pishuonlain [190]

Answer:

The first one is false and the second is vertex

Step-by-step explanation:

7 0
3 years ago
For a family with 3 children, what is the probability that they have exactly 2 boys and 1 girl?
Triss [41]

Answer:

\frac{3}{8}

Step-by-step explanation:

Possibilities (G for girls and B for boys):

GGG

GGB

GBG

<u>GBB </u>

BGG

<u>BGB </u>

<u>BBG </u>

BBB

4 0
3 years ago
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