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2 years ago

Plzz help will give brainliest

Mathematics

1 answer:

skad [1K]2 years ago

6 0

Answer: 82.5 - x = R sorry if I am wrong

Step-by-step explanation:

1. We know all the angles in a triangle add up to 180 degrees.

180 = x + x + 15 + R

2. Combine like terms

180 = 2x + 15 + R

3. Subtract 15 from both sides

165 = 2x + R

4. Divide both sides by 2

82.5 = x + R

5. Subtract x from both sides

82.5 - x = R

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Suppose the population of a certain city is 3031 thousand. It is expected to decrease to 2246 thousand in 50 years. Find the per

Kipish [7]

Answer:

The rate at which the population decrease is 59.8 %

Step-by-step explanation:

Given as :

The population of city = 30,31,000

Now The population of city decrease to 22,46,000

The time period in which population decrease is 50 years

Let the percentage rate of decrease = R%

So,

Final population = initial population × $(1-\frac{Rate}{100})^{Time}$

Or, 22,46,000 = 30,31,000 × $(1-\frac{Rate}{100})^{50}$

Or, $\frac{2246000}{3031000}$ = $(1-\frac{Rate}{100})^{50}$

Or, $\frac{2246}{3031}$ = $(1-\frac{Rate}{100})^{50}$

$(\frac{2246}{3031})^{\frac{1}{50}}$ = $( 1-\frac{Rate}{100})$

So , 0.99402 = $( 1-\frac{Rate}{100})$

Or, $\frac{Rate}{100}$ = 1 - 0.99402

So, Rate = $5.98\times 10^{-3}$ × 100

Or, Rate = 0.598 = 59.8 %

Hence The rate at which the population decrease is 59.8 % Answer

4 0

3 years ago

P= a + b + c; P = 28, a =5, b = 11 (Perimeter of a triangle)

ollegr [7]

Answer:

c = 12.

Step-by-step explanation:

Fill in what you know. 28 = 5 + 11 + c. Add 5 and 11 together. 28 = 16 + c. Then subtract 16 from both sides 28 - 16 = 16 - 16 +c. Then the number you have left is your answer.

4 0

3 years ago

Read 2 more answers

The area of a square is 100 centimeters what is it perimeter?

Studentka2010 [4]

Answer: 40 cm

Step-by-step explanation:

x^2=100

√x=10

10+10+10+10=40

4 0

3 years ago

537.05 is what percent of 467

stepan [7]

Answer:

115%

Step-by-step explanation:

Set up the equation like this:

537.05 / 467 = x / 100

Cross multiply

467x = 53705

x = 115

3 0

3 years ago

Please help with this i will attach photo of figure

Zigmanuir [339]

The variable I=f(w) represents the number of individuals (in thousands) infected w weeks after the epidemic begins.

The value of I=f(2) represents the number of individuals in thousandas infected 2 weeks after the beginning of the epidemic.

From the graph, where I=8, we can conclude that there are 8,000 infected people after 2 weeks of the beginning of the epidemic.

Answer:

f(2) = 8

Means 8,000 people are infected after 2 weeks of the beginning of the epidemic.

8 0

1 year ago