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Kay [80]
3 years ago
8

Find the positive solution of x when: 25 = 4/x²

Mathematics
1 answer:
sladkih [1.3K]3 years ago
7 0
1) Multiply both sides by x²

25 {x}^{2} \: = \: 4

2) Divide both sides by 25

{x}^{2} \: = \: \frac{4}{25}

3) Square root both sides

x \: = \: \frac{2}{5}



Viola!
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SOMEBODY PLZ HELP NO LINKS PLZ AN THANK YOU
satela [25.4K]

Answer:

im not too sure but B

Step-by-step explanation:

8 0
3 years ago
What is the greatest possible product of 2 primes whose sum is 30?
Alenkinab [10]
Prime numbers below 30: 1, 3, 5, 7, 11, 13, 17, 19, 23, 29

2 prime numbers that sum up to 30:
1 and 29
7 and 23
13 and 17

The greatest possible product will be 13 x 17 = 221

Answer: The two prime numbers are 13 and 17
7 0
3 years ago
Task-Solve the following problems:
Marizza181 [45]
4:5:7

X1500

6000:7500:10500

Share 2 is $7500 and share 3 is $10500.

Each 1 in the original ratio is worth $1500, so you just multiply it by the corresponding number to get the answers.
3 0
3 years ago
If <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%2B3%7D%7B4%7D" id="TexFormula1" title="\frac{x+3}{4}" alt="\frac{x+3}{4}" align
AleksAgata [21]

Answer:

f^{-1}(x) = 4x-3 is the right answer.

Step-by-step explanation:

I the function is f(x) = \frac{x+3}{4}

f(x)=\frac{1}{4}(x+3)

Then we have to find inverse of function f(x).

we will write the equation as y=\frac{1}{4}(x+3)

4y = x + 3

x = 4y - 3

Now we will rewrite the function as

f^{-1}(x) = 4x-3

So the answer is f^{-1}(x) = 4x-3

3 0
4 years ago
Read 2 more answers
Decide whether each expression is equivalent to 0.75t-21. 3/4t-21 3/4( t-21) 0.75( t-28) t-0.25t-21. Explain how you know
butalik [34]

Answer: expression 1,3 and 4 are equivalent to 0.75t-21.

Step-by-step explanation:

Expression 1

3/4t-21

= 0.75t - 21

Expression 2

3/4( t-21)

Multiply through by 0.75

= 0.75 ( t - 21 )

= 0.75t - 15.75

Expression 3

0.75( t-28)

Multiply through by 0.75

= 0.75t - 21

Expression 4

t-0.25t-21

let t = 1

1-0.25t - 21

= 0.75t - 21

expression 1,3 and 4 are equivalent to 0.75t-21.

6 0
3 years ago
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