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Zolol [24]
3 years ago
9

What is the value of x in the equation 25x^2=16? A.+ 5/4 B.+4 C.+ 4/5 D.+16/25

Mathematics
1 answer:
4vir4ik [10]3 years ago
5 0

Answer:

x = ± 4/5

Step-by-step explanation:

25 x^2 = 16

Divide each side by 25

25 x^2 /25 = 16 /25

x^2 = 16 /25

Take the square root of each side

sqrt(x^2) = ±sqrt(16/25)

We know that sqrt(a/b) = sqrt(a)/ sqrt(b)

x = ±sqrt(16) / sqrt(25)

x = ± 4/5

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How do I solve 3(-2+3)>12
Alekssandra [29.7K]
First do the -2+3 since its in the Parentheses. So now your left with 1 times 3 >12. 
Then you do the multiplication so now you're left with 3>12 which isn't true.

3 0
3 years ago
Rip van Winkle fell asleep for a very long time. When he fell asleep, his beard was 8 millimeters long, and each passing week it
S_A_V [24]

Answer:

L(w) = 8 mm + (2 mm/wk)(wk)

Step-by-step explanation:

L(w) = length of beard as a function of time in weeks

L(w) = 8 mm + (2 mm/wk)(wk)

7 0
3 years ago
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Please help asap i need to pass this!
mr Goodwill [35]

Answer:

B

Step-by-step explanation:

i had that same question to answer and got it right

6 0
3 years ago
Sara can complete 3/4 of a puzzle in 7/8 of an hour. How much a puzzle can she complete in an
8090 [49]

Answer:

x = 6/7 of a puzzle

Step-by-step explanation:

Number of puzzle : time taken

= 3/4 : 7/8

How much a puzzle can she complete in an hour?

Let

x = number of puzzle to complete

Number of puzzle : time taken

= x : 1

Equate both ratios to solve for x

3/4 : 7/8 = x : 1

3/4 ÷ 7/8 = x / 1

3/4 × 8/7 = x / 1

24/28 = x / 1

Cross product

24 * 1 = 28 * x

24 = 28x

x = 24/28

= 6/7

x = 6/7 of a puzzle

7 0
3 years ago
The function f(x)=1+1.5ln(x+1) models the average number of free-throws a basketball player can make consecutively during practi
UNO [17]

Answer:

402 days.

Step-by-step explanation:

f(x)=1+1.5ln(x+1)

When f() = 10 we have:

10 = 1 + 1.5ln (x + 1)

ln (x + 1) = (10-1) / 1.5 = 6

x + 1 = e^6

x = e^6 - 1 = 402.4.

8 0
3 years ago
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