First thing you should do is reduce coefficients.

1st equation has all multiples of '2'. Divide by 2
---> x +3y = -6

2nd equation has multiples of 5. Divide by 5.
---> x - y = 2

Now elimination part is easier.
Eliminate 'x' variable by subtracting 2nd equation from 1st.

x + 3y = -6
-(x - y = 2)
----------------------
4y = -8

Solve for 'y'
4y = -8

y = (-8)/4 = -2

Substitute value for 'y' back into 2nd equation:
x - (-2) = 2
x + 2 = 2
x = 0

Solution to system is:
x=0, y =-2

5 0

3 years ago

Read 2 more answers

A car travels 420 miles in 6 hours. What is the unit rate?

Semmy [17]

Answer:

Step-by-step explanation:

because 70 times 6 equals 420

3 0

3 years ago

2 Which expression is equivalent to (29) ? 13 g12 qog

sattari [20]

I’m pretty sure that it’s the third answer (q^12)! :)

5 0

3 years ago

What is the value of a?

Juli2301 [7.4K]

Actually, the answer is not A, if you're saying A is the first choice above. That's incorrect. You will need to use the Geometric mean for right triangles here to figure out what the value of a is. We will use this form: $\frac{YZ}{WZ} = \frac{WZ}{XZ}$ . We have a value for YZ of 3; side a is XZ. That means in order to solve this we need WZ, which we can find using pythagorean's theorem. 3^2 + 4^2 = c^2 and 9 + 16 = c^2 and c = 5. Now we fill in accordingly: $\frac{3}{5}= \frac{5}{XZ}$ . Cross-multiply to get 3XZ=25 and side XZ is $\frac{25}{3}$ . XZ is 25/3 and YZ is 3, so 25/3 - 3 = XY. That means that XY (side a) = 16/3 or 5 1/3, choice B, or the second one down.

8 0

3 years ago