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lesya [120]
3 years ago
5

Solve for j. 144j2 + 21 = 85

Mathematics
1 answer:
Sphinxa [80]3 years ago
5 0

Answer:

2/3

Step-by-step explanation:

I assume the 2 after the j is a square. So, we bring the 21 to the other side by subtracting it from both sides, getting 144j^2=64. Now we divide to get 64/144 = j^2. Make sure NOT to simplify it, it's perfect right now. The square root of that is \sqrt{64}/ \sqrt{144}, or 8/12, which we can now simplify to 2/3. Hope this helps!

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2 years ago
Area for rectangle in the coordinate plane. IXL Geometry help pls !
Sidana [21]

Answer:

Step-by-step explanation:

The co-ordinates of the rectangle are:

A (8, 6)

B (-4, -10)

C (-8, -7)

D (4, 9)

The Area of Rectangle is Given by: <em>length x breadth </em>= AB x BC

Lengths of AB and BC can be found by distance formula

<em>length</em>(AB) = \sqrt{(x_{2} - x_{1} )^{2} + (y_{2} - y_{1} )^{2}} = \sqrt{(-4-8)^{2} + (-10-6)^{2}} = 20

Similarly,

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Area of Rectangle = AB x BC = 20 x 5 = 100 square units

5 0
3 years ago
I need help with this someone!!
Alex

Answer:

Do u have answer choices?

4 0
3 years ago
Read 2 more answers
Simplify the expression x + 5+ 3.
JulsSmile [24]

Answer:

x  + 8

Step-by-step explanation:

x + 5 + 3.

add the numbers

↓

x + 8  

8 0
3 years ago
Read 2 more answers
Help pls..................
Triss [41]

Answer:

Area = 152ft²

Step-by-step explanation:

Simpifly:

A = 13(13-6) + 9(13-6)

A = 13(7) + 9(7)

A = 22(7)

A = 22(7)

A = 20(7)+2(7)

A = 140 + 14

A = 152

5 0
3 years ago
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