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4 years ago

X-y = -10 2x+4y=22 substitution

Mathematics

1 answer:

Tema [17]4 years ago

4 0

Answer:

[1] x - 4y = 22

[2] 2x + 5y = -21

Step-by-step explanation:

Solve equation [1] for the variable x

[1] x = 4y + 22

// Plug this in for variable x in equation [2]

[2] 2•(4y+22) + 5y = -21

[2] 13y = -65

// Solve equation [2] for the variable y

[2] 13y = - 65

[2] y = - 5

// By now we know this much :

x = 4y+22

y = -5

// Use the y value to solve for x

x = 4(-5)+22 = 2

I am sorry if I get it wrong.

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3 years ago

Paul opened a bakery. The net value of the bakery (in

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Step-by-step explanation:

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3 years ago

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Answer:

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3 years ago

A godown is 40m long,30m wide and 9m high. How many cuboidal boxes can be stored in it, if the dimension of each box is 2mx1.2x4

sergiy2304 [10]

Answer: There are 10000 cuboidal boxes can be stored in the godown.

Step-by-step explanation:

Since we have given that

Dimensions of godown will be

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2 m, 1.2 m, 45 cm

As we know Number of cuboidal boxes is given by

$\frac{\text{ Volume of godown }}{\text{ Volume of cuboidal box}}\\\\=\frac{40\times 30\times 9}{2\times 1.2\times 0.45}\\\\=10000$

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3 years ago

Im learning about Recursive and Explicit in Pre-Calc, and it says to use the rule to write the first three terms of each sequenc

Tems11 [23]

Hello,

4. you have sequences defined by the first term and a recursive relation.

$a_1=3\\\\a_n=2a_{n-1} \ \ \text{ for n}> 1$

Take n = 2, it gives

$a_2=2a_1$ , right?

But you know $a_1=3$

so $a_2=2a_1=2*3=6$

This is the second term. You are asked to find the first three terms.

Now, let's take n = 3

$a_3=2a_2=2*6=12$

So the first three terms are 3, 6, 12.

$a_1=12\\\\a_2=\dfrac{1}{2}a_1+1=\dfrac{12}{2}+1=6+1=7 \\ \\a_3=\dfrac{1}{2}a_2+1=\dfrac{7}{2}+1=\dfrac{9}{2}$

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10.

$a_1=2\\\\a_2=-1\\\\a_3=a_2+a_1=-1+2=1\\\\a_4=a_3+a_2=1-1=0$

Do not hesitate if you have any question.

Thank you

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4 years ago