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Anon25 [30]
2 years ago
8

For what values of h and k does the linear system have infinitely many solutions? 2x1 + 5x2 = −1 hx1 + kx2 = 7

Mathematics
1 answer:
Kruka [31]2 years ago
4 0

Answer:

The values of h and k for a linear system with infinitely many solutions are -2 and 5, respectively.

Step-by-step explanation:

Let 2\cdot x_{1}+5\cdot x_{2} = -1\cdot h\cdot x_{1} + k\cdot x_{2} = 7, if this linear system has infinitely many solutions, then the following conditions must be met:

-1\cdot h = 2 and k = 5.

h = -2 and k = 5

The values of h and k for a linear system with infinitely many solutions are -2 and 5, respectively.

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the area of a rectangular field is 18000m^2 if the ratio of length and breath is 5:4 find its perimeter
zavuch27 [327]

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{540 \: m}}}}}

Step-by-step explanation:

Let the length and breadth be 5x and 4x respectively.

Area of rectangular field = 18000 m²

<u>Finding </u><u>the </u><u>value </u><u>of </u><u>x</u>

Area of rectangle = \sf{l \times b}

Plug the values

⇒\sf{18000 = 5x \times 4x}

Calculate the product

⇒\sf{18000 = 20 {x}^{2} }

Swap the sides of the equation

⇒\sf{20 {x}^{2}  = 18000}

Divide both sides of the equation by 20

⇒\sf{ \frac{20 {x}^{2} }{20}  =  \frac{18000}{20} }

Calculate

⇒\sf{ {x}^{2}  = 900}

Squaring on both sides

⇒\sf{x = 30}

<u>Replacing the value of x in order to find the value of length and breadth</u>

Length = \sf{5x = 5 \times 30 = 150 \: m}

Breadth = \sf{4x = 4 \times 30 = 120 \: m}

<u>Finding </u><u>the </u><u>perimeter</u><u> </u><u>of </u><u>the </u><u>rectangular</u><u> </u><u>field</u>

Perimeter of rectangle = \sf{2(l + b)}

plug the values

⇒\sf{2(150 + 120)}

Distribute 2 through the parentheses

⇒\sf{300 + 240}

Add the numbers

⇒\sf{540 \: m}

Hope I helped !

Best regards!!

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A bookkeeper needs to post the cost of a desk and chair into his records. The cost of the desk was five times the cost of the ch
max2010maxim [7]
Desk is $600

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600 + 120 = 720
7 0
2 years ago
Read 2 more answers
14 T 1,000 lb. + 2 T 1,000
Olegator [25]

The answer will be 17 tons.

Step-by-step explanation:

Since we have given that

14 T 1,000 lb. + 2 T 1,000 lb.

As we know that

1\ ton=2000\ lbs\\\\14\ tons=2000\times 14\ lbs\\\\14\ tons=28000\ lbs

So, 14 T 1,000 lb. is given by

28000\ lbs+1000\ lbs\\\\=29000\ lbs

Similarly,

1\ ton=2000\ lbs\\\\2\Tons=2\times 2000\ lbs\\\\2\ tons=4000\ lbs

so,

2T 1,000 lb. is given by

4000+1000\\\\=5000\ lbs

So,  14 T 1,000 lb. + 2 T 1,000 lbs is given by

29000+5000\\\\=34000\ lbs\\\\=\frac{34000}{2000}\\\\=17\ tons

Hence, the answer will be 17 tons.

6 0
2 years ago
Working simultaneously, four fudge machines complete a big order in 32 hours. All the machines at the fudge factory work at the
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Answer:

lol

Step-by-step explanation:

lol

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