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3 years ago

10

Solve the system of equations. - 5x – 3y - 9 = 0 4x – 187 - 54 = 0

1 answer:

liberstina [14]3 years ago

8 0

Answer:

Step-by-step explanation:

Solve simultaneously

-5x-3y=9

4x-187-54=0

4x=241

x=60.25

To get y

Substitute for x in equal one

-5(60.25)-3y=9

-301.25-3y=9

-3y=9+301.25

-3y=310.25

y=-103.4

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X+6 /3 = 2+x-2/5

olasank [31]

We can treat this problem like you regularly subtract fractions. First find the common denominator, which is 15.

So:

5(x+6)/15 = 30/15 + 3(x-2)/15

(5x+6)/15 - (30/15) - (3x - 6)/15

As you already know the answer, I'm assuming you can do the rest.

Hope this helps!

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3 years ago

Which of the following is true given that 2.1 < 2.8?

sattari [20]

Answer:

$\large \boxed{\mathrm{2.1 \ is \ to \ the \ left \ of \ 2.8 \ on \ a \ horizontal \ number \ line}}$

Step-by-step explanation:

$2.1$

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3 years ago

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If £23 = 500rubles, how many £ are in 616 rubles? Give your answer to 2 dp.

astraxan [27]

Answer:

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Step-by-step explanation:

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3 years ago

Write the first four terms of the sequence defined by An=20-30(n-1)

monitta

The first four terms of sequence is 20, -10, -40, -70

<em><u>Solution:</u></em>

Given that we have to find the first four terms of sequence

<em><u>Given recursive formula is:</u></em>

$a_n = 20 - 30(n-1)$

<em><u>To find the first term, substitute n = 1</u></em>

$a_1 = 20-30(1-1)\\\\a_1 = 20-30(0)\\\\a_1 = 20$

Thus the first term of sequence is 20

<em><u>To find the second term, substitute n = 2</u></em>

$a_2 = 20-30(2-1)\\\\a_2 = 20-30(1)\\\\a_2 = 20-30\\\\a_2 = -10$

Thus the second term of sequence is -10

<em><u>To find the third term, substitute n = 3</u></em>

$a_3 = 20-30(3-1)\\\\a_3 = 20-30(2)\\\\a_3 = 20-60\\\\a_3 = -40$

Thus the third term of sequence is -40

<em><u>To find the fourth term, substitute n = 4</u></em>

$a_4 = 20-30(4-1)\\\\a_4 = 20-30(3)\\\\a_4 = 20-90\\\\a_4 = -70$

Thus the first four terms of sequence is 20, -10, -40, -70

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3 years ago

4/5 = 28/??? (Simple Answer)

maksim [4K]

4/5 = 28/x

You need to multiply 4 by how many times to get 28?

4.y = 28

y = 28/4

y = 7

So, you need to multiply 5 by 7 to know x.

x = 5.7

x = 35

4/5 = 28/35

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