3 years ago

2x+7y=-20, y=3x+7. solve using elimination

Mathematics

1 answer:

Setler79 [48]3 years ago

8 0

Answer:

(x,y) = (-3,-2)

Step-by-step explanation: Please brainliest!

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The rectangle has an area of x2+13x+36 square meters and a length of x+9 meters.

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4 years ago

7x + 6 ≤ 7(x – 4)<br> What is the answer

photoshop1234 [79]

Answer:

no soluction

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4 years ago

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Answer:

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3 years ago

Let V be the volume of a right circular cone of height h=14 whose base is a circle of radius R=2. An illustration a right circul

Alla [95]

Answer:

The area of a horizontal cross section at a height is $\pi\times(2-\dfrac{y}{7})^2$

Step-by-step explanation:

Given that,

Height = 14 m

Radius = 2 m

Let V be the volume of a right circular cone

We need to calculate the value of R

Using given data

$\dfrac{h}{r}=\dfrac{h-y}{R}$

Put the value into the formula

$\dfrac{14}{2}=\dfrac{14-y}{R}$

$7R=14-y$

$R=2-\dfrac{y}{7}$

We need to calculate the area of a horizontal cross section at a height y

Using formula of area

$A=\pi R^2$

Put the value into the formula

$A=\pi\times(2-\dfrac{y}{7})^2$

Hence, The area of a horizontal cross section at a height is $\pi\times(2-\dfrac{y}{7})^2$

3 0

3 years ago

How to get answer to this question don’t really know how to?

Umnica [9.8K]

$3x+13=3(x+6)+1$
So just solve for x. First expand the right side by distributing.
$3x+13 = 3x+18+1$
Then, combine like terms.
$3x+13=3x+19$
$3x = 3x+6$
$0=6$

So we got 0 = 6 which is not true, meaning the equation has no solutions so the answer is option 1, zero.

5 0

2 years ago