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3 years ago

Solve the system using the elimination method -2x + 4y = -20 3x + 8y = -12

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

7 0

Answer:
X=4
Y=-3
Hope this helped:)

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How to solve these type of problems?

Juli2301 [7.4K]

You wing that and hope you get it right!

8 0

4 years ago

C=0.2x^2-92x+11,165 what is the minimum daily cost?

yanalaym [24]

You will need to use formula x= -b/2a because the min value will by the vertex of function.
x= -(-92/(2*.2)) = 230
then plug in x value

C=0.2(230)^2-92(230)+11,165= 585

3 0

3 years ago

Kendrick's Kennel has 2 spots for cats for every 7 spots for dogs. If he has a total of 144 spots for both cats and dogs,then ho

Keith_Richards [23]

Alright, lets get started.

Kendrick's Kennel has 2 spots for cats for every 7 spots for dogs.

Suppose spots for cats = 2x

So, spots for dogs will be = 7x

Total spots for cats and dogs will be = $2x + 7x$

Total spots for cats and dogs will be = $9x$

As per given in question, total spots for both cats and dogs are 144, so

$9x = 144$

Dividing 9 in both sides

$\frac{9x}{9} =\frac{144}{9}$

x = 16

So, spots for cats = $2 * 16 = 32$

Spots for dogs = $7 * 16 = 112$

So, spots for dogs more than cats are = $112 - 32 = 80$

It means he has 80 more spots for dogs than cats. : Answer

Hope it will help :)

7 0

4 years ago

Given that f(x) = x2 + 4x – 21 and g(x) = x - 3, find f(x) · g(x) and

jolli1 [7]

9514 1404 393

Answer:

(f·g)(x) = x^3 +x^2 -33x +63

Step-by-step explanation:

The product of the two functions can be found using the distributive property.

$f(x)\cdot g(x)=(x^2+4x-21)\cdot(x-3)\\\\=(x^2+4x-21)(x)+(x^2+4x-21)(-3)\\\\=x^3+4x^2-21x-3x^2-12x+63\\\\\boxed{(f\cdot g)(x)=x^3 +x^2-33x+63}$

8 0

3 years ago

The difference between the supplement of an angle and twice its complement is 28°, find the measure of the supplement of the ang

kumpel [21]

Answer:

152°

Step-by-step explanation:

Supplementary angles are two angles that sum to 180°

Complementary angles are two angles that sum to 90°

Let x° = the angle

⇒ Supplement of the angle = 180° - x°

⇒ Complement of the angle = 90° - x°

The difference between the supplement of an angle and twice its complement is 28°:

⇒ (180 - x)° - 2(90 - x)° = 28°

⇒ 180 °- x° - 180° + 2x° = 28°

⇒ x = 28°

Therefore, the measure of the supplement of 28° is:

180° - 28° = 152°

7 0

3 years ago