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4 years ago

Jack wants to simplify the expression below.

Mathematics

1 answer:

mamaluj [8]4 years ago

6 0

Answer:

5.3x - 4 .

Step-by-step explanation:

(6.7x -3) - (3.4x - 1) + (2x - 2)

1. using the commutative property:

= 6.7x - 3 + 2x - 2 - (3.4x - 1) (we can remove the parentheses around the first 2 groups because they are added).

2. Using the distributive property on the last group:

= 6.7x - 3 + 2x - 2 - 3.4x + 1 (distributing the negative over the parentheses).

3. Now adding like terms we get:

5.3x - 4 (answer).

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Help!!! be quick

malfutka [58]

Answer:

Yeah you are correct

Step-by-step explanation:

4 0

3 years ago

The following data show the midterm and final exam scores in an English writing class. Student 1 2 3 4 5 6 7 8 9 10 11 12 Midter

tester [92]

Answer:

The co variance of the midterm and final exam scores is 58.76.

Step-by-step explanation:

The formula to compute the sample co variance is:

$Cov(x,y)=\frac{\sum(X-Mean\ of\ X)(Y-Mean\ of\ Y)}{n-1}$

The values are computed in the table below.

Compute the co variance as follows:

$Cov(x,y)=\frac{\sum(X-Mean\ of\ X)(Y-Mean\ of\ Y)}{n-1}\\=\frac{646.33}{12-1}\\ =58.76$

Thus, the co variance of the midterm and final exam scores is 58.76.

7 0

3 years ago

A miner has 8 diamonds. He has 48 workers. Explain how each worker can get a piece of the diamonds.

Dmitrij [34]

Answer:

The worker can get a piece of the diamonds using 48÷8 which it is 6.

Step-by-step explanation:

I hope that it is what you're looking for. I hope this helps

6 0

3 years ago

Which mixed number is greater than 6.78

Serga [27]

Lets test out all the answers

A. 2/3 is about .666 so A is not

B. 3/5 is .75 so B is B also not

C 7/9 is 0.7777 which is still less so C is not

D. 4/5 is about 0.80 and this is more than 0.78 so D is the answer

5 0

3 years ago

Doune Punowing:

nataly862011 [7]

The length of pathway is 10 inches on map.

Step-by-step explanation:

Given,

Total distance = 350 miles

According to map,

1 inch = 35 miles

Let, x be the number of inches on map.

Therefore, using proportion;

Inch : mile :: inch : mile

$1:35::x:350\\$

Product of mean = Product of extreme

$35*x=350*1\\35x=350\\$

Dividing both sides by 35;

$\frac{35x}{35}=\frac{350}{35}\\x=10$

The length of pathway is 10 inches on map.

Keywords: Ratio, proportion

Learn more about proportions at:

#LearnwithBrainly

8 0

3 years ago