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4 years ago

PLS HELP I DONT UNDERSTAND :( WILL GIVE BRAINLIEST!! +25 POINTS

Mathematics

1 answer:

Ray Of Light [21]4 years ago

3 0

The correct answer would be letter b. the x intercept is -3.

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Factor completely 9xy + 36x − 10y − 40.

Harlamova29_29 [7]

9x(y+4)-10(y+4)
(9x-10)(y+4)

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3 years ago

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Need help on question 22

zhannawk [14.2K]

You multiply 5 times 10, which gives you 50. This is the length of one side. Since it's a square, all sides are the same length.

Answer: 50cm x 50cm

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3 years ago

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3. Solve for y: -5x + 2y = 14

Schach [20]

Answer:

y= -1

Explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

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Evaluate the expression 3+ [5(2-3) - 6]

iragen [17]

Answer:

Answer is below

Step-by-step explanation:

3+5(2−3)−6

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So therefore, your answer would be -8

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Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in t

makkiz [27]

Answer:

Step-by-step explanation:

$x + 2y + 3z = 12$

$z=\frac{12-x-2y}{3}$

Volume = $V=f(x,y) = xy(\frac{12-x-2y}{3} )$

find partial derivatives using product rule

$f_x =\frac{y}{3} (12-2x-2y)\\f_y = \frac{x}{3} (12-x-4y)$

i.e.

Using maximum for partial derivatives, we equate first partial derivative to 0.

y=0 or x+y =6

x=0 or x+4y =12

Simplify to get y =2, x = 4

thus critical points are (4,2) (6,0) (0,3)

Of these D the II derivative test gives

D<0 only for (4,2)

Hence maximum volume is when x=4, y=2, z= 4/3

Max volume is = 4(2)(4/3) = 32/3

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3 years ago