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marshall27 [118]
3 years ago
7

Help with number 4 and number 7 please

Mathematics
1 answer:
Kaylis [27]3 years ago
6 0
Answer is in the picture

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Equation that represents the line that passes through the point (-2,-1) and has a slope of 5
ss7ja [257]
Straight line:
y = mx + c
m is the slope of the graph and c is the y-intercept
In this case, m = 5 as stated in the question, so...
y = 5x + c
By substituting the given co-ordinates (-2,-1) into this equation, we can find c
-1 = 5(-2) + c
-1 = -10 + c
-1 + 10 = -10 + c + 10 (Add 10 to both sides)
9 = c
c = 9
Put c = 9 into the equation:
y = 5x + 9
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Which is not a solution to the equation x -2y = 10 ?
Travka [436]
The answer is B because -3 -8 = -11. 
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THERE IS A 41% CHANCE HIS NEXT READING MATERIAL WILL BE A MAGAZINE
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Find dy/dx by implicit differentiation for ycos(x)=xcos(y)
alekssr [168]

Answer:

dy/dx = (cos y + y sin x) / (cos x + x sin y)

Step-by-step explanation:

y cos x = x cos y

y (-sin x) + dy/dx cos x = x (-sin y dy/dx) + cos y

-y sin x + dy/dx cos x = -x sin y dy/dx + cos y

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