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Step2247 [10]
3 years ago
15

I don’t understand this

Mathematics
2 answers:
PIT_PIT [208]3 years ago
5 0

Answer:

24.5

Step-by-step explanation:

7²/x²-2

7²/2²-2

49/4-2

49/2

24.5

fomenos3 years ago
3 0
Replace x with 3 in the equation to get:
7^2/ 3^2 -2

7^2 changes to 49 and 3^2 changes to 9:
49/9-2

Simplify 9-2 to 7:
49/7

Divide 49 by 7:
7










You might be interested in
Which expression is equivalent to 5^3?
AleksAgata [21]

Answer:

C and D

Step-by-step explanation:

5^3 - 5^0 = 125 - 1 = 124, so it's not A

5^12 / 5^4 = 5^(12-4) = 5^8, so it's not B

5^7 * 5^-4 = 5^(7+(-4)) = 5^3, so it can be C

5^0 * 5^3 = 5^(0+3) = 5^3, so it can be D

5 + 5^2 = 5 + 25 = 30, so it can't be E

3 0
2 years ago
A freight train departs from one train station to its destination at a constant speed. Suppose the distance the train is from th
barxatty [35]

Answer:

108 miles

Step-by-step explanation:

Given the points (0.5, 135) and (2,81)

Diatnce between two points :

D = √(x2 - x1)² + (y2 - y1)²

X1 = 0.5 ; y1 = 135 ; x2 = 2 ; y2 = 81

D = √(2^2 - 0.5^2) + (81^2 - 135^2)

D = √(4 - 0.25) + (6561 - 18225)

D = √3.75 −11664

D = 107.98263

D = 108 miles

6 0
3 years ago
Three times a number plus 12 minus 5 times the same number is 22. what is the number?
saw5 [17]
3n+12-5 x n=22

4n=15


4 0
3 years ago
Read 2 more answers
Plz help
inn [45]
We are given with
P(pop quiz) = 60%
P(not do homework) = 85%

And the condition that
P (pop quiz and do homework) > 5%

So,
P (pop quiz) x P (do homework)
P (pop quiz) x ( 1 - P (not do homework) )
60% x ( 1 - 85%)

The result is greater than five percent so he will not do his homework.
5 0
3 years ago
A car the normally sells for 20,000 is on sale for 18,000 what is the discount rate?
balandron [24]
(20,000-18,000)÷20,000=0.1=10%
6 0
3 years ago
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