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3 years ago

Solve the following simultaneous equations. 5x – 3y = 6 3x + 4y= 21

Mathematics

1 answer:

ehidna [41]3 years ago

3 0

Answer:

y = 3, x = 3

Step-by-step explanation:

5x – 3y = 6

5x = 6 + 3y

x = (6 + 3y)/5

3x + 4y= 21

3x = 21 - 4y

x = (21-4y)/3

Using simultaneous equations:

(21-4y)/3 = (6 + 3y)/5

--> 105-20y = 18 + 9y

29y = 87

y = 3

x = (6 + 3(3))/5 = 3

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Please hurry find the measure of S

Andrews [41]

Answer:

m∠S = 29.5

Explanation:

S $\huge\boxed {\sf \triangle}$ R

In this triangle, QR = SQ, which means its an isosceles triangle, angle S and R is similar.

<u>Thus solve:</u>

m∠S = (180° - 121°)/2

m∠S = 29.5°

3 0

2 years ago

Read 2 more answers

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r-ruslan [8.4K]

Answer:

Not quite sure what you're meant to solve for, but my solution is below.

Step-by-step explanation:

The square root of a value squared is the absolute value of that value, because squaring removes all negatives. Therefore:

$\sqrt{(y+2)^2}=c$

$\mid y+2\mid=c$

$\mid y\mid =c-2$

Hope this helps!

7 0

3 years ago

What is the value of the digit 2 in this number?

antiseptic1488 [7]

The answer is A = 2 tenths
C = .2
A and C

6 0

4 years ago

Is n÷12=36,n=108 true or false

maksim [4K]

Answer:

False

Step-by-step explanation:

n÷12=36

n=36*12

hence n=432

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4 0

2 years ago

Read 2 more answers

Help ASAP please!!!

N76 [4]

Answer:

$450,000.

Step-by-step explanation:

<h3>100% - 38% = 62% of the previous house value is the current house value after the 38% decrease.</h3><h3>We'll first convert 62% to a decimal by dividing by 100.</h3>

62% = 62 / 100 = 0.62

<h2>0.62x = 279,000</h2><h3>Multiply by (100/62) on each side.</h3><h2>x = 450,000</h2><h2>The house value when it was purchased was $450,000.</h2>

8 0

3 years ago