All categories

2 years ago

Solve the simultaneous equations2x - 3y = 185x + 9y = -10

Mathematics

2 answers:

Evgesh-ka [11]2 years ago

7 0

Answer: x=4 y= -10/3

Step-by-step explanation:

Look at the attachment. It should explain.

stepladder [879]2 years ago

4 0

Answer:

2x - 3y = 18 (1)

5x + 9y = -10 (2)

<=>

Multiply both sides of (1) by 5, and multiply both sides of (2) by 2, then:

10x - 15y = 90

10x + 18y = -20

Subtract (2) to (1):

=> 33y = -110 => y = -110/33

Substitute y back into (1):

=> 2*x - 3*(-110/33) = 18

=> 2*x + 10 = 18

=> 2*x = 8

=> x = 4

=> Solution: x = 4, y = -110/33

Hope this helps!

You might be interested in

a rectangular field has a length that is two meters more than the breadth,if the total area of the field is 168m², calculate the

sdas [7]

Answer:765

Step-by-step explanation:

Jjjjjjh kingdom

6 0

2 years ago

Jodi favorite clothes include 4 t-shirts, three pairs of jeans, and 2 pairs of sandals. How may days in a row can she wear a dif

Marysya12 [62]

24 days bc 4 t-shirts × 3 jeans × 2 sandals = 24 possible combinations

6 0

2 years ago

Read 2 more answers

The figure shows a quarter circle and an equilateral triangle. What is thearea of the shaded part? Give your answer to 3 signifi

ad-work [718]

Explanation

The shaded area represents a segment. This can be solved with the formula below;

$\mleft(\frac{\theta}{360}\mright)\times\pi r^2-\frac{1}{2}r^2sin\theta$

Since the triangle is an equilateral triangle, it implies that the angle subtended at the centre is 60 degrees. Also, the given radius is 7 cm

$\begin{gathered} =7^2(\frac{60}{360}\times3.14-\frac{1}{2}\times\sin 60)^{}_{} \\ =49(\frac{3.14}{6}-\frac{\sqrt[]{3}}{4}) \\ =4.43\operatorname{cm}^2 \end{gathered}$

Answer:

$4..43\operatorname{cm}^2$

7 0

7 months ago

Click on the length of the rectangle<br><br>

umka2103 [35]

Answer:

It's 2 1/4

Step-by-step explanation:

I dont know how to explain this... but I'm 100% positive on the answer so

7 0

2 years ago

You have a square piece of paper. Where do you cut it to make a regular octagon?

gregori [183]

Cut the 4 corners off and you will have an 8-sided octagon

6 0

3 years ago

Solve the simultaneous equations2x - 3y = 185x + 9y = -10​

Solve the simultaneous equations2x - 3y = 185x + 9y = -10