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just olya [345]
3 years ago
10

Find the error and explain why:

Mathematics
1 answer:
Sloan [31]3 years ago
5 0

1)  9x + 2 = x + 5  ---> 9x + 2 = 6

subtracted X from one side but not the other

2) 3(x-4) + 5 = 12  ---> 3x + 4 + 5 = 12

didn't distribute correctly: 3(x-4)

multiplied the X by 3 but not the -4

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Sofia's taco truck lets customers choose 3 ingredients from the list below to add to their tacos. How many groups of 3 different
DIA [1.3K]

Using the combination formula, and considering that the list has 6 ingredients, it is found that 20 groups of 3 different ingredients can go on a taco.

The order in which the ingredients are chosen is not important, hence, the <em>combination formula</em> is used to solve this question.

<h3>Combination formula: </h3>

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by:

C_{n,x} = \frac{n!}{x!(n-x)!}

In this problem, 3 ingredients are chosen from a set of 6, hence:

C_{6,3} = \frac{6!}{3!3!} = 20

20 groups of 3 different ingredients can go on a taco.

To learn more about the combination formula, you can take a look at brainly.com/question/25990169

4 0
2 years ago
Mr Conover bought 6 boxes of Patel for his art class. He paid $4.50 for each box. What was the total cost of the box
slava [35]
4.50×6=27.00. the total cost of the box will be $27.00
3 0
3 years ago
Tell whether you can make a unique triangle or no triangle with these conditions: angles measuring 45° and 90°
just olya [345]

Answer:

  The triangle with those measures will be unique.

Step-by-step explanation:

The triangle described is an isosceles right triangle with side lengths 10 cm. All such triangles are congruent (it is unique).

7 0
3 years ago
A fair die is rolled once. Let A be the event of rolling an even number, and let B be the event of rolling a number greater than
IRISSAK [1]

Answer:

A ∩ B = {4, 6}

Step-by-step explanation:

A die had 6 faces

S = {1, 2, 3, 4, 5, 6}

If A  be the event of rolling an even number, then;

A = {2, 4, 6}

If B be the event of rolling a number greater than 3, then;

B = {4, 5, 6}

A ∩ B are the values that are common to both sets

A ∩ B = {4, 6}

3 0
3 years ago
(Use distributive property)<br> 6 (5x + 3)
S_A_V [24]

Answer:

30x + 18

Step-by-step explanation:

Using distributive property, you can find the answer like so.

Multiply 6 and 5x first

6(5x + 3)

30x + 3

Now multiply 6 by 3

6(5x + 3)

30x + 18

Hope I explained this well to you. :)

7 0
2 years ago
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