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3 years ago

Please help will give brainly and all my points but please show work

Mathematics

2 answers:

kow [346]3 years ago

7 0

Answer:

5+2(3x-4)-x

5+6x-8-x

it is simplified to -3+5x

Step-by-step explanation:

sammy [17]3 years ago

5 0

Answer:

Q10: 5x - 3

Q15: s = 2

Q21: 4 ft

Q24: -33%

Q42: 10.3

Step-by-step explanation:

Question 10) Simplify. 5 + 2(3x − 4) − x

5 + 6x - 8 - x

= -3 + 5x

= 5x -3

Question 15) Solve. 27s − 29 = 54s − 83.

27 s -27 s -29 + 83 = 54 s -27 s -83 + 83

54 = 27 s

s = 2

Question 21) On a sunny day, a 2-foot red kangaroo casts a shadow that is 7 feet long. The shadow of a nearby eucalyptus tree is 14 feet long. Find the height of the tree.

The ratio of the tree and kangaroo is 2:1

Therefore, using this logic, 14 / 7 = 2, 2 x 2 = 4ft

The height of the tree is 4ft

Question 24) Find the percent change from 600 to 408. Tell whether it is a percent increase or decrease. If necessary, round your answer to the nearest percent.

408 / 608 = 0.67 = 67%

67 - 100 = -33%

This is a percent decrease

Question 42) Use the distance formula to find the distance to the nearest tenth, from R(7, −2) to W(−2, 3).

Distance formula: d = sqrt((x2 - x1)^2 + (y2 - y1)^2)

d = sqrt((-2 - 7)^2 + ( 3 - (-2))^2

d = sqrt((-9)^2 + (5)^2)

d = sqrt(81 + 25)

d = sqrt(106)

d = 10.29 = 10.3 (nearest tenth)

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He would need to sell 28 because
12.50*28=350 and 350+50=400

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3 years ago

Solution for 5y+2y = -24

Sindrei [870]

7y=-24
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3 years ago

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Which choice is equivalent to the expression below?

Andre45 [30]

Answer:

C. $4\sqrt{7} -4x\sqrt{7}$ is correct

Steps:

$4\sqrt{7} -3\sqrt{7}x-x\sqrt{7} \\\\4\sqrt{7} -3\sqrt{7} x-\sqrt{7} x\\\\4\sqrt{7} +(-3\sqrt{7} x-\sqrt{7} x)\\\\4\sqrt{7} -4\sqrt{7} x$

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3 years ago

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Suppose n(x)= 22 and n(y) is 13 what is the maximum number of elements X ∪Y can have ?

Nikolay [14]

The inclusion/exclusion principle states that

$|X\cup Y|=|X|+|Y|-|X\cap Y|$

That is, the union has as many members as the sum of the number of members of the individual sets, minus the number of elements contained in both sets (to avoid double-counting).

Therefore, $|X\cup Y|$ will have the most elements when the sets $X$ and $Y$ are disjoint, i.e. $X\cap Y=\emptyset$ , which would mean the most we can can in this case would be

$|X\cup Y|=|X|+|Y|=22+13=35$

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3 0

3 years ago

Bought a new car lately? The following table presents the number of vehicles sold in a certain country by several manufacturers

ella [17]

Answer:

The Relative Frequency Table is:

Manufacturer Relative Frequency

General Motors 0.242

Ford 0.208

Chrysler LLC 0.148

Toyota 0.177

Honda 0.116

Nissan 0.109

Step-by-step explanation:

To find out the relative frequency we need to use the formula:

Relative Frequency = Frequency / Sum of All Frequencies

We can find the sum of all the frequencies by adding all the sales for the year 2013.

Sum of Frequencies for 2013 = 225,650 + 194,068 + 138,085 + 164,423 + 107,526 + 101,113

Sum of Frequencies for 2013 = 930865 cars

Now we can compute the relative frequencies for each of the manufacturers as follows:

General Motors: 225650/930865 = 0.242

Ford: 194068/930865 = 0.208

Chrysler LLC: 138085/930865 = 0.148

Toyota: 164423/930865 = 0.177

Honda: 107526/930865 = 0.116

Nissan: 101113/930865 = 0.109

Relative Frequency Distribution Table for the 2013 sales:

Manufacturer Relative Frequency

General Motors 0.242

Ford 0.208

Chrysler LLC 0.148

Toyota 0.177

Honda 0.116

Nissan 0.109

3 0

3 years ago