For khan academy. Need help immediately. Explain if you can

You sold a combined total of 25 of item A and item B. You made $88. Refer to the prices of these items in the table (in part 4)

Pavlova-9 [17]

19 quantities of item A and 6 of item B were sold, respectively

<h3>How to determine the quantity sold</h3><h3>The missing information in the question are</h3>

The cost of item A is $4 and
The cost of item B is $2.

Using the information and the given parameters, we have the following system of equations:

A + B = 25

4A + 2B = 88

Multiply the first equation by 2

2A + 2B = 50

Subtract this equation from the second equation to eliminate B

2A = 38

Divide both sides by 2

A = 19

Substitute A = 19 in A + B = 25

19 + B = 25

Subtract 19 from both sides

B = 6

Hence, 19 quantities of item A and 6 of item B were sold, respectively

Read more about system of equations at:

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7 0

2 years ago

PLSSS HEKPPPPPPPPPPPP

Nezavi [6.7K]

Answer:

the answer for this question is 45

3 0

3 years ago

Read 2 more answers

Mrs. Braddock has a bag containing 6 lipsticks, 4 eye shadows, 6 eye liners, and 5 mascaras. She will randomly choose one item f

Slav-nsk [51]

Answer:

The probability that she will not pull lipstick is 71%.

Step-by-step explanation:

The probability of an event E is the ratio of the favorable number of outcomes to the total number of outcomes.

$P(E)=\frac{n(E)}{N}$

Here,

n (E) = favorable number of outcomes

N = total number of outcomes

The contents in Mrs. Braddock's bag are:

Number of lipsticks = n (L) = 6

Number of eye shadows = n (S) = 4

Number of eye liners = n (E) = 6

Number of mascaras = n (M) = 5

Total number of items in the bag = N = 21

Consider that the probability of an event occurring is P. Then the probability of the given event not taking place is known as the complement of that event.

Complement of the given event is, 1 – P.

Compute the probability of selecting a lipstick as follows:

$P(L)=\frac{n(L)}{N}\\\\=\frac{6}{21}\\\\=\frac{2}{7}$

Compute the probability of not selecting a lipstick as follows:

$P(L^{c})=1-P(L)$

$=1-\frac{2}{7}\\\\=\frac{7-2}{7}\\\\=\frac{5}{7}$

Convert this probability into percentage as follows:

$\frac{5}{7}\times 100 = 71.4286\approx 71\%$

Thus, the probability that she will not pull lipstick is 71%.

8 0

3 years ago

Let A = {Dirk, Johan, Frans, Sarie}, B = {Frans, Sarie, Tina, Klaas, Henrika}, C = {Hans, Frans}. Find the number indicated. n(A

olchik [2.2K]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \bold{9}}}}}$

Step-by-step explanation:

Given,

A = { Dirk , Johan , Frans , Sarie }

B = { Frans , Sarie , Tina , Klass , Henrika }

To find : n ( A ) + n ( A )

Now, count the number of member of a set A

n ( A ) = 4

Also, Count the number of members of a set B

n ( B ) = 5

Finding n( A ) + n ( B )

= 4 + 5

= 9

Hope I helped!

Best regards! :D

6 0

3 years ago

Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard

larisa86 [58]

The range, variance and standard deviation of the is :

Range = 31.2
Variance = 152.978
Standard deviation = 12.368

Given the data :

39 37 35 27 19 16 13 9 8.6 7.8

Arranging in ascending order :

7.8, 8.6, 9, 13, 16, 19, 27, 35, 37, 39

Range = maximum - minimum values

Maximum value = 39

Minimum value = 7.8

Range = 39 - 7.8 = 31.2

The variance :

The variance : Σ(X - m)² / (n - 1)

m = mean

n = number of items

m = ΣX/ n = 211.4 / 10 = 21.4

Variance = [(39-21.14)^2 + (37-21.14)^2 + (35-21.14)^2 + (27-21.14)^2 + (19-21.14)^2 + (16-21.14)^2 + (13-21.14)^2 + (9-21.14)^2 + (8.6-21.14)^2 + (7.8-21.14)^2] / (10-1)

Variance = 1376.804 / 9

Variance = 152.978

Standard deviation = √variance

Standard deviation = √152.978

Standard deviation = 12.368

Learn more : brainly.com/question/15528814

8 0

3 years ago