3 years ago

What would i use to factor 15x^2+10x-9x-6

1 answer:

3 0

I would recommend combing like terms (ex- 10x-9x=x) so it could be 15x^2+x-6 . I recommend using something like mathpapa to show you step-by-step how to do it, and if you know, then it just gives you a quick answer

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A fence is to be built to enclose a rectangular area of 800 square feet. The fence along three sides is to be made of material t

myrzilka [38]

Answer:

dc/dx = 0 when x = 20. hence fence is 20×40

Step-by-step explanation:

Given data:

Rectangular Area = 800 ft^2

three side material cost = $5 per ft

fourth side material cost is $15 per ft

let expensive side is x and other dimension assume to be y

Then cost is c

c = 5(x+ 2y) + 15 x

xy = 800, so y = 800/x

c =5(x+ 1600/x^2) + 15x

for minimum when dc/dx = 0

$\frac{dc}{dx} = 5(1-\frac{1600}{x^2}) + 15 = 0$

$5(1-\frac{1600}{x^2}) + 15 = 0$

$(1-\frac{1600}{x^2}) + 3 = 0$

$(1-\frac{1600}{x^2}) = - 3$

$x^2 - 1600 = -3x^2$

$4x^2 - 1600 = 0$

(2x-40)(2x+40) = 0

x = 20

dc/dx = 0 when x = 20. hence fence is 20×40

3 0

4 years ago

A taxi ride cost $29.50. The driver charged $3 plus $0.40 per 0.2 mile traveled. What equation could be solved to find out how m

denpristay [2]

29.50=3+(0.4*0.2x)
x represents the number of miles traveled

6 0

3 years ago

Please help me with this math problem!

Fofino [41]

Answer:

The family that has $3$ members are $352$ .

Step-by-step explanation:

The probability is the chance of the event occur.

The probability for $3$ members is $0.2$ .

The total number of families having $3$ members is probability × total population.

The total number of families having $3$ members $=$ $0.2$ × $1760$

$=352$

6 0

2 years ago

The weights of tennis balls are normally distributed, with the mean being 5.15 ounces and the standard deviation being 0.10. wha

zlopas [31]

The empirical rule for normal distributions states that approximately 68% of the data points lie within the range plus and minus one standard deviation of the mean.
The answer is 68%.

8 0

3 years ago

WILL GIVE BRAINLIEST , pls helppp .

Juli2301 [7.4K]

Answer:

Step-by-step explanation:

f=120p

f=120(16)

f= 1920

5 0

3 years ago