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3 years ago

Solve 2 + 3ex + 2 = 7 for x.

Mathematics

2 answers:

statuscvo [17]3 years ago

6 0

Answer:

$x = 1$

Step-by-step explanation:

$2 + 3x + 2 = 7 \\ 2 + 3x = 7 - 2 \\ 2 + 3x = 5 \\ 3x = 5 - 2 \\ 3x = 3 \\ \\ x = \frac{3}{3} \\ \\ x = 1$

Salsk061 [2.6K]3 years ago

6 0

This example that I made can help you understand it I hope this help u

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A grapefruit has a peel that is 1cm thick and a total diameter of 12cm. What percentage of volume of the grapefruit is the peel?

ira [324]

Answer:

0.3056 or 30.56%

Step-by-step explanation:

The volume of the grapefruit with the peel is:

$V_p=\frac{4 \pi (d/2)^2}{3}\\V_p=\frac{4 \pi (12/2)^2}{3}\\V_p=48 \pi$

When removing the peel, the grapefruit diameter becomes 10 cm (take out 1 cm of peel from each side). The volume of the grapefruit without the peel is:

$V_n=\frac{4 \pi (d/2)^2}{3}\\V_n=\frac{4 \pi (10/2)^2}{3}\\V_n=33.333 \pi$

The percentage of the volume correspondent to the peel is given by the difference between both volumes, divided by the total volume:

$\%P = \frac{48\pi - 33.333\pi}{48\pi}\\ \%P =0.3056 = 30.56\%$

30.56% of volume of the grapefruit is the peel.

4 0

4 years ago

(I WILL GIVEbrainiest) which measure of central tendency is least representative of the data set shown? 1, 35, 36, 37, 37, 38 me

alex41 [277]

A) 30.66666
B) 37
C) 36 & 37 or 36.5

6 0

3 years ago

Read 2 more answers

Two objects in outer space drift apart at an average rate of 25 kilometers every year. if the objects continue to drift apart fr

arlik [135]

The distance between the two objects in 10 years will be 250 kilometers.

What is Distance?

Distance is the total movement of an object without any regard to direction. We can define distance as to how much ground an object has covered despite its starting or ending point.

We are given:

The rate at which two objects drift apart in 1 year = 25 km

To calculate the distance between the two objects in 10 years, we apply unitary method:

The distance, the two objects has drifted apart in 1 year is 25 km

So, the distance, the two objects has been drifted apart in 10 years, will be = $\frac{25}{1} * 1 = 250 Km$

Therefore, the distance between the two objects in 10 years will be 250 kilometers.

Learn more about distance

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#SPJ4

3 0

1 year ago

Use the chart below to answer the question

Anuta_ua [19.1K]

Answer:

Denmark has the greatest population density, While the USA has the least density population

Step-by-step explanation:

When Calculating Population Density you use d = p/a

Which would make the USA density population

USA

29.12 = 272,648,000 / 9,364,520

Denmark

124.72 = 5,248,000/42,077

Ghana

77.21 = 18,339,000/237,533

Where D is the density, P is the population, A = the area.

8 0

3 years ago

Sang-Jin has only quarters and nickels in her piggy bank. She has 66 coins in the bank with a value of $11.50.

asambeis [7]

Let x be quarters, and y be nickels.
0.25x + 0.05y = 11.50

x + y = 66

x= 66 - y

0.25(66-y)+0.05y=11.50
16.5 -0.25y+0.05y = 11.50
16.5-0.2y=11.50
-0.2y=11.50-16.5
-0.2y=-5
-0.2y/-0.22=-5/-0.2
y=25

x+y=66
x+(25)=66
x=66-25
x=41

So there are 41 quarters, and 25 nickels.

5 0

3 years ago