A system of equations is a collection of two or more equations with the same variables. When solving this system, u need to find the unknown variables. One way of solving a system of equations is by substitution.
example :
2x + 2y = 6 (equation 1)
3x + y = 4 (equation 2)
we need to pick a variable and isolate it. The easiest one to pick since it is already by itself is the y in the second equation.
3x + y = 4.....subtract 3x from both sides
y = -3x + 4
now we can sub -3x + 4 in for y in the 1st equation...u have to make sure u sub it back into the 1st equation and not the same equation u used to find it.
2x + 2y = 6.....sub in -3x + 4 in for y and solve for x
2x + 2(-3x + 4) = 6...distribute thru the parenthesis
2x - 6x + 8 = 6...subtract 12 from both sides
2x - 6x = 6 - 8...simplify
-4x = -2...divide both sides by -4
x = -2/-4
x = 1/2
now that we have a numerical number for x, u can sub this back into either of ur equations to find a numerical answer for y.
y = -3x + 4...when x = 1/2
y = -3(1/2) + 4
y = -3/2 + 4
y = -3/2 + 8/2
y = 5/2
so ur solution is : (1/2,5/2) <===
and u can check ur answers by subbing them into ur equations to see if they satisfy both equations...because for it to be a solution to this system, it has to satisfy both equations and not just one of them
Answer:
3rd, 4th, and 5th options.
Step-by-step explanation:
The way this was formatted was a little weird, but the 3rd, 4th, and 5th options are correct I think.
If there was 358.92 left, it has to be divided 3 ways (after subtracting 451.89 - 358.92). So that means that 3c or c+c+c could be correct, as well as using dis. property to switch around the last one I guess.
if this helped, brainliest is appreciated.
Answer:
7/24
Step-by-step explanation:
Given in the question,
a number cube is tossed and a spinner is spun.
Cube have 6 in numbers
1 2 3 4 5 6
probability of having 3 or 4 = 2/6
= 1/3
Spinners are commonly made with 6, 8, 10 and 12 flat surfaces.
If a spinner has 8 flats then you have a 7/8 chance of not getting an 8.
Probability of getting a 3 or 4 on the number cube and not getting 8
"and" mean multiplication
7/8 x 1/3
7/24
<span>6+7 (8b+4)
</span><span><span>6+<span><span>(7)</span><span>(<span>8b</span>)</span></span></span>+<span><span>(7)</span><span>(4<span>)
</span></span></span></span><span><span>6+<span>56b</span></span>+<span>28
</span></span>
<span>Combine Like Terms:
</span>
<span>6+<span>56b</span></span>+<span>28
</span>
<span>(<span>56b</span>)</span>+<span>(<span>6+28</span><span>)
</span></span>
answer: <span><span>56b</span>+<span>34</span></span>