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poizon [28]
3 years ago
5

Evaluate 7^-2 A. -49 B. -1/49 C.1/49 D. -14

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0

Answer:

C. 1/49

Step-by-step explanation:

When there is a negative sign located inside the power, you must eliminate it. To do so, put the whole expression under 1, and then simplify from there:

7^-2 = 1/(7^2)

Simplify: 7^2 = 7 x 7 = 49

1/49 is your answer.

~

aleksandr82 [10.1K]3 years ago
4 0
C . 1/49 because you need to multiply and square then minus
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Arrange the numbers in the ascending order: 3/4,1/12,9/16,7/24
OLEGan [10]
Ascending means going up
First change into decimals
3/4=0.75
1/12=0.083
9/16=0.5625
7/24=0.291666…..

Start from smallest to largest number
0.291666…..,0.5625,0.75,0.083

Find their fractions
7/24,9/16,3/4,1/12

Answer:7/24,9/16,3/4,1/12
4 0
1 year ago
For the given word problem, identify the rate of change. Gasoline at a particular gas station costs $2.78 per gallon. If Cory bu
zhenek [66]

Answer:

Cory bought 6.47 gallons

rate of change is $2.78 per gallon

Step-by-step explanation:

cost of gas per gallon = $2.78

it means that if one buy 1 gallon he will have to pay $2.78 and similary for each increase in 1 gallon of gallon gas he will have to pay $2.78.

Thus, rate of change is cost of gas per gallon as cost to buy gas changes with the change in quantity of gallon.

Let the quantity of gas bought be x gallon.

Total cost for x gallons = cost of gas per gallon*x = 2.78x

Given that total money paid by him is $18

2.78x = 18

x = 18/2.78 = 6.47

Thus, Cory bought 6.47 gallons

rate of change is $2.78 per gallon

4 0
3 years ago
Please show work i rlly need this :)
makvit [3.9K]

Answer:

10/16 (written as a fraction)

Step-by-step explanation:

Starting point

-(-2x+1)=9-14x

Solve the minus sign

2x-1=9-14x

Swap the Xs and the numbers, changing sign

2x+14x=9+1

Do calculations

16x=10

Result

x=10/16

4 0
2 years ago
Read 2 more answers
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The answer to ur question is 20.94395. 
4 0
3 years ago
Read 2 more answers
How many significant figures are there on 0.05050A​
Katen [24]

Answer:

2 Significant Figures

Step-by-step explanation:

The A and the .

7 0
3 years ago
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