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Ahat [919]
3 years ago
6

Which of the following systems of equations is an example of one where substitution is the best method?

Mathematics
2 answers:
lana66690 [7]3 years ago
6 0

Answer:

y = 2/7x +11

3x-4y = -24

Step-by-step explanation:

We would want to use substitute on the last set of equations since the first equation is already solved for y.  It is easy to substitute for y in the second equation

blondinia [14]3 years ago
3 0

Answer:

The answer is option D.

I hope this helps.

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If the class contains 11 boys and 14 girls, what is the probability of calling on a girl?
Ronch [10]

Answer: P (girl) = 14 / 25

Concept:

Here, we need to know the idea of probability.  

Probability is a measure of the likelihood of an event to occur.  

If you are still confused, please refer to the attachment below for a graphical explanation.

Solve:

Number of boys = 11

Number of girls = 14

Total number of people = 11 + 14 = 25

P (girl) = Favorable / Total (refer to the attachment)

P (girl) = 14 / 25

Hope this helps!! :)

Please let me know if you have any questions

8 0
3 years ago
Elizabeth picked ⅔ off a row of strawberries from her garden. How many rows will Elizabeth have picked if she does this for 4 da
LenaWriter [7]
2 2/3 rows

4x2=8 (8/3)
8/3= 2 2/3
5 0
3 years ago
Olivia flips a two-sided counter and then spins a spinner with six equal-size sections labeled 1 through 6. One side of the coun
Novay_Z [31]

Answer:

12

Step-by-step explanation:

A 2 - sided counter ; (red, yellow)

A spinner (1,2,3,4,5,6)

Number of trials = 80

P(red and number > 3) :

P(red) = 1/2 ;

P(number >3) : numbers greater Than 3 = (4, 5, 6)

Hence, P(number <3) = 3 /6 = 1/2

Theoretical probability = 1/2 *1/2 = 1/4

Expected number of outcomes :

1/4 * number of trials

1/4 * 80 = 20

Experimental outcome :

Relative frequency = number of outcomes / number of trials

Relative frequency = 2/5

Hence,

2/5 = number of outcomes / 80

Cross multiply :

160 = number of outcomes * 5

Number of outcomes = 160 /5 = 32

Actual outcomes = 32

Difference between actual and expected :

32 - 20 = 12

7 0
3 years ago
Whats 9+10??????????
nikdorinn [45]
The answer to 9+10 is 19 because if you add 9 to the number 10, you get 19
3 0
3 years ago
Read 2 more answers
To solve the equation w/8 - 4 = 20, you would first add 4 to each side and then divide each side by 8. TrueFalse
MrRa [10]

Answer:

False

Step-by-step explanation:

The first part is correct because adding 4 to each side will help isolate the variable w, but since w is divided by 8 already you would want to multiply by 8 instead, so dividing each side by 8 would not work.

5 0
3 years ago
Read 2 more answers
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