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1 year ago

Question 1

Mathematics

1 answer:

raketka [301]1 year ago

6 0

Using the weighted mean, the coordinate of P is of P = -1.77.

<h3>What is the missing information?</h3>

This problem is incomplete, but researching it on a search engine, the points and weights are given as follows:

D = 2 with a weight of 3.

B = -6 with a weight of 9.

A = -9 with a weight of 2.

C = -1 with a weight of 3.

E = 6 with a weight of 5.

<h3>What is the weighted mean?</h3>

The weighted mean is given by the <u>sum of all elements in a data-set multiplied by it's weight, divided by the sum of the weights</u>.

Hence, for the points this problem, the weighted mean is given as follows:

P = (2 x 3 - 6 x 9 - 9 x 2 - 1 x 3 + 6 x 5)/(3 + 9 + 2 + 3 + 5) = -1.77.

The coordinate of P is of P = -1.77.

More can be learned about the weighted mean at brainly.com/question/24398353

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The following values represent the amount of money (in dollars) 10 people have in their wallets: 10, 12, 19, 5, 6, 8, 1, 13, 4,

boyakko [2]

The median of all these numbers in dollars is 7.5.

<h3>How to obtain median when no. of given data are odd ?</h3>

When the no. of given data are odd we arrange those nos. in an order increasing or decreasing order and the middle no. is the median of the given odd numbers.

According to the given question the following values represent the amount of money (in dollars) 10 people have in their wallets: 10, 12, 19, 5, 6, 8, 1, 13, 4, 7 and we have to find the median.

First we observe that no. of people is even so there will be two middle nos.

Now lets arrange these nos. in an order from least to greatest which is

1, 4, 5, 6, 7, 8, 10, 12, 13, 19 in this 7 and 8 are middle numbers.

So, to find the median of all these nos. we will divide these two middle nos. by 2.

∴ ( 7 + 8 )/2

= 15/2

= 7.5.

Learn more about median here :

brainly.com/question/28060453

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7 0

2 years ago

Can someone help me question 3:) anything is appreciated (8th grade math)

MA_775_DIABLO [31]

Answer:

y = x + 3

Step-by-step explanation:

There is a slope of 1 and the y-intercept is at 3. Therefore m would be 1 and b would be 3

8 0

3 years ago

First answer gets brainliest

mash [69]

Answer:

$2.20b + 3.60m = 44.20\\2.50b + 3.40m = 44.70$

Step-by-step explanation:

So in this systems of equations, we know the prices of the items, so the coefficients will represent how many Mary is getting of that item. So you can represent amount of bread as the variable b and the amount of milk as the variable m. On the right will be the total amount spent, since multiplying the price by how much you buy should get you the price

So since at store A, she spends 44.20 and bread costs 2.20 and milk costs 3.60 you get

$2.20b + 3.60m = 44.20$

Since at store B, she spends 44.70 and bread costs 2.50 and milk costs 3.40 you get the equation:

$2.50b + 3.40m = 44.70$

3 0

2 years ago

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Luna buys gummy bears that come in 3.53-ounce bags. How many ounces of gummy bears are there in 3 bags? ounces

leonid [27]

Answer:

10.59 ounces

Step-by-step explanation:

The answer is 3.53 * 3 = 10.59 ounces.

7 0

3 years ago

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In △ABC, point M is the midpoint of AB , point D∈ AC so that AD:DC=2:5. If AABC=56 yd2, find ABMC, AAMD, and ACMD.

Komok [63]

Since point M is the midpoint of AB, then AM=MB.

Consider the area of the triangles ABC and BMC:

$A_{ABC}=\dfrac{1}{2}\cdot AB\cdot h_c=56\ yd^2,$

where $h_c$ is the height drawn from the vertex C to the side AB.

So, $AB\cdot h_c=112\ yd^2.$

Now

$A_{BMC}=\dfrac{1}{2}\cdot BM\cdot h_c=\dfrac{1}{2}\cdot \dfrac{AB}{2}\cdot h_c=\dfrac{1}{4}\cdot AB\cdot h_c=\dfrac{1}{4}\cdot 112=28\ yd^2.$

Also

$A_{AMC}=A_{ABC}-A_{BMC}=56-28=28\ yd^2.$

Now consider the area of the triangles AMD and CMD. Let $h_M$ be the height drawn from the point M to the side AC.

$A_{AMD}=\dfrac{1}{2}\cdot AD\cdot h_M=\dfrac{1}{2}\cdot \dfrac{2AC}{7}\cdot h_M=\dfrac{2}{7}\cdot \left(\dfrac{1}{2}\cdot AC\cdot h_M\right)=\dfrac{2}{7}\cdot A_{AMC}=\dfrac{2}{7}\cdot 28=8\ yd^2.$

Therefore,

$A_{MDC}=A_{AMC}-A_{AMD}=28-8=20\ yd^2.$

Answer: $A_{MBC}=28\ yd^2, A_{AMD}=8\ yd^2, A_{MDC}=20\ yd^2.$

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3 years ago

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