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damaskus [11]
2 years ago
10

What is the positive solution to the equation 0 = 3x2-31 ?

Mathematics
1 answer:
Bas_tet [7]2 years ago
6 0

Answer:

4.47

Step-by-step explanation:

3x²+31=91

3x²=91-31

3x²=60

x²=60÷3

x²=20

x=√20

x=4.47

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5x - 1 +5x<br> 1.1<br> 2.10x-1<br> 3.11x<br> 4.-1
Verdich [7]

Answer:

2

the answer is 2 coz it's like terms

5 0
3 years ago
Kayla squared a number x and added this result to -6.5. This gave her an answer of 42.5.
ladessa [460]

Answer:

7, -7

Step-by-step explanation:

x^2-6.5= 42.5 add 6.5 to both sides

x^2= 49

The square root of 49 is 7 and -7.

7 0
2 years ago
Claire is putting up a fence around her rectangular garden. The length is four less than double the width. The perimeter is 22 f
Doss [256]

Answer:

The dimensions are 6 by 5 feet.

Length = 6 feet.

Width = 5 feet.

Step-by-step explanation:

Let the length = L

Let the width = W

Perimeter of a rectangle = 2L + 2W

Translating the word problem into an algebraic equation, we have;

L = 2W - 4 ........equation 1

22 = 2L + 2W .......equation 2

Substituting the value of "L" into equation 2, we have;

22 = 2(2W - 4) + 2W

22 = 4W - 8 + 2W

22 + 8 = 6W

30 = 6W

W = 30/6

Width, W = 5 feet.

To find the length, L

Substituting the value of "W" into equation 1, we have;

L = 2W - 4

L = 2(5) - 4

L = 10-4

Length, L =6 feet

Therefore, the dimensions of the garden are 6 by 5 feet.

5 0
2 years ago
1721 to 1 significant figure <br>1975 to 2 significant figure<br>76.71 to 1 decimal point​
Evgesh-ka [11]
If you need it rounded, it would be 2 then 20 then 76.1. If you just need the base numbers, it would be 1 then 19 then 76.7
7 0
2 years ago
Read 2 more answers
3x + 10y = 12, 3x - 8y = 12
weeeeeb [17]
Working attached below:

Hope this helps! Any questions let me know :)

6 0
2 years ago
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