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Ann [662]
2 years ago
10

Does anyone know how to solve?

Mathematics
2 answers:
jek_recluse [69]2 years ago
7 0
Basically you canceling out and your answer is R= 1/2
DIA [1.3K]2 years ago
7 0
Remember that to add/subtract fractions you need a common denominator...

3/(r-2)+1/r=0  so we need r(r-2) as the common denominator...

3r/(r(r-2))+(r-2)/(r(r-2))=0  we can cancel out the r(r-2) by multiplying the whole equation by it leaving us with:

3r+r-2=0 combine like terms

4r-2=0  add 2 to both sides

4r=2  divide both sides by 4

r=1/2
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What is the answer to 2/5 + 3/8
kakasveta [241]

Answer:

31 /40

Step-by-step explanation:

Find the least common denominator or LCM of the two denominators:

LCM of 5 and 8 is 40

For the 1st fraction, since 5 × 8 = 40,

3 0
2 years ago
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PLEASE HELP!!<br> 7. Are the two triangles similar? How do you know?
aleksandr82 [10.1K]

Answer:

yes

Step-by-step explanation:

similar means resembling without being identical or same shape but different size. triangles are obviously the same shape and they're obviously different size.

3 0
3 years ago
Mitchell deposits $1,200 in an account that pays 1.5% simple interest. He keeps the money in the account for three years without
rosijanka [135]

The amount that will be in the account after three years is $1,254.00.

Using this formula

B = P+ ( P x R x T)

Where:

B=Amount ?

P=Principal=$1,200

r=Rate=1.5% or 0.015

T=Time=3 years

Let plug in the formula

B=$1,200+($1,200×0.015×3)

B=$1,200+$54

B= $1,254.00

Inconclusion the amount that will be in the account after three years is $1,254.00.

Learn more here:

brainly.com/question/20348538

7 0
3 years ago
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Consider the function on the interval (0, 2π). f(x) = 7 sin2(x) + 7 sin(x) (a) Find the open interval(s) on which the function i
-BARSIC- [3]

Answer with Step-by-step explanation:

Given

f(x)=7sin(2x)+7sin(x)

Differentiating both sides by 'x' we get

14cos(2x)+7cos(x)=f'(x)

Now we know that for an increasing function we have

f'(x)>0\\\\14cos(2x)+7cos(x)>0\\\\2cos(2x)+cos(x)>0\\\\2(2cos^{2}(x)-1)+cos(x)>0\\\\4cos^{2}(x)+cos(x)-2>0\\\\(2cos(x)+\frac{1}{2})^2-2-\frac{1}{4}>0\\\\(2cos(x)+\frac{1}{2})^2>\frac{9}{4}\\\\2cos(x)>\frac{3}{2}-\frac{1}{2}\\\\\therefore cos(x)>\frac{1}{4}\\\\\therefore x=[0,cos^{-1}(1/4)]\cup [2\pi-cos^{-1}(1/4),2\pi ]

Similarly for decreasing function we have

[tex]f'(x)

Part b)

To find the extreme points we equate the derivative with 0

f'(x)=0\\\\cos(x)=\frac{1}{4}\\\\x=cos^{-1}(\frac{1}{4})

Thus point of extrema is only 1.

4 0
3 years ago
3. Which of the following represent an exponential DECAY function? Select all that apply. Please hurry thank you​
Ilya [14]
Option 2 - it is decreasing
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