All identities are equations, but ONLY SOME equations are identities.
sinx = cos(π/2 - x) (Equation and Identity
y= cosx -x², it's an equation but NOT an identity
The slope of line d is 1/4
Perpendicular lines have slopes of negative reciprocals
The negative reciprocal of -4 is 1/4, because the reciprocal is when you flip-flop a fraction, and the opposite is adding a negative sign or taking away a negative sign
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Answer: Option (2)
Step-by-step explanation:
Answer: x = -3, y = 2
<u>Step-by-step explanation:</u>
3x + 2y = -5 → 3(3x + 2y = -5) → 9x + 6y = -15
4x - 3y = -18 → 2(4x - 3y = -18) → <u> 8x - 6y </u>= <u>-36 </u>
17x = -51
<u> ÷17 </u> <u>÷17 </u>
x = -3
3x + 2y = -5
3(-3) + 2y = -5
-9 + 2y = -5
<u> +9 </u> <u> +9 </u>
2y = 4
<u> ÷2 </u> <u>÷2 </u>
y = 2
There are 14 total marbles
8 red
6 blue
Hopefully that helps answer your question some