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dalvyx [7]
3 years ago
8

Expand 3(-5q + 4). A.5q + 12 B.-15q + 4 C.-15q + 12 D. 5q + 12

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
5 0
_Award brainliest if helped! 
(-5q * 3)  + (4 *3 ) = -15q + 12 
The answer is C. 
earnstyle [38]3 years ago
4 0
The answer would be C) -15q + 12.

Distribute ( 3 * -5q + 3 * 4 )

reduce 3 * -5q to -15q ( -15q + 3 * 4 )

simplify 3 * 4 to 12 ( -15q + 12 ).
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Suppose that c (x )equals 7 x cubed minus 70 x squared plus 13 comma 000 x is the cost of manufacturing x items. Find a producti
Leno4ka [110]

Answer:

<h3>A production level that will minimize the average cost of making x items is x=5.</h3>

Step-by-step explanation:

Given that

c(x)=7x^3-70x^2+13,000x

is the cost of manufacturing x items

<h3>To find a production level that will minimize the average cost of making x items:</h3>

The average cost per item is f(x)=\frac{c(x)}{x}

Now  we get f(x)= 7x^2-70x+13000

<h3> f(x) is continuously differentiable for all x</h3>

Here x≥0 since it represents the number of items.,

Put x=0 in 7x^2-70x+13000

For x=0 the average cost becomes 13000

f(0)=7(0)^2-70(0)+13000

=13000

<h3>∴ f(0)=13000</h3><h3>To find Local extrema :</h3>

Differentiating f(x) with respect to x

f^{\prime} (x)=14x-70=0

14x=70

x=\frac{70}{14}

<h3>∴  x=5 gives the minimum average cost .</h3><h3>At x=5 the average cost is </h3>

f(5)=7(5)^2-70(5)+13000

=12825

<h3>∴ f(5)=12825 which is smaller than for x=0 is 13000</h3><h3>∴ f(x) is decreasing between 0 and 5 and it is increasing after 5.</h3>
4 0
3 years ago
Read 2 more answers
(GIVING BRAINLIYEST)<br> 7. what is the volume of these 2 objects
bazaltina [42]

Figure #1

use the smaller part of the figure with the dimensions of 1x2x3 and find the volume of that 1x2x3= 6m

find the area of the bigger part 3x6x3= 54m

54+6= 60m³

Figure #2

smaller part 2x2x7= 28m

bigger part 7x5x3= 105m

105+28= 133ft³

5 0
2 years ago
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Elena received a 25 dollar gift card to a fun center she drives a race car which costs 0.75 she also wants to use the grift card
Alex777 [14]
B: 4.75+0.75n ≥25

Because she has already spent 4.75 and she only has $25 and she cannot spend more than$25
4 0
2 years ago
Is this the correct answer i need help please
xz_007 [3.2K]
I do believe you are right 
6 0
3 years ago
Read 2 more answers
Which of the following could be the system of nonlinear inequalities graphed below?
Ivan

Answer:

Option A.

Step-by-step explanation:

step 1

we know that

The equation of the solid line is

y=5

The solution is the shaded area above the solid line

so

The equation of the first inequality is

y\geq 5

step 2

The equation of the dashed line is

y=x^{2} -5x+6

The solution is the shaded area above the dashed line

so

The equation of the second inequality is

y>x^{2} -5x+6

therefore

The system of inequalities could be

y\geq 5

y>x^{2} -5x+6

4 0
3 years ago
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