Substitution is where we first Isolate one of the unknowns, express it in terms of the other unknown, and replace the isolated unknown with the other unknown in another equation. So that each time we only need to deal with one unknown. I think you'll get a better idea here:
First name these 2 equations with 1 and 2.
4x + 5y = 7 (1)
y = 3x + 9 (2)
Since y is already isolated in (2), so we can skip the isolation step and continue to substitute.
Substitute (2) into (1).
4x + 5(3x+9) = 7
Expand.
4x + 15x + 45 = 7
Group.
19x + 45 = 7
Shift +45 to the other side and turn it into -45.
19x = 7 - 45
19x = -38
Shift x19 to the other side, turn it into /19.
X = - 38/19
X = - 2
Now we solved x already, we can just substitute x= - 2 back to equation (2).
y = 3(-2) + 9
y = - 6 + 9
y = 3
So, the answers are
x = - 2
y = 3
The correct answer for this question would be options A and C. The values that have three significant figures are 1.04 and 0.0760. Based on this answer, this rule applies to this: <span>Any zeros between two </span>significant digits<span> are </span><span>significant which explains why option A is qualified. And in number 0.0760, the 0.0 before 7 is not considered significant at all. Hope this explanation helps.</span>
Answer:
dunno
Step-by-step explanation:
Answer: this question is acutaully very simple. This is really a divosing promblem. Remeber to look around for clues to see if this is a division problem or mabye a adding problem. So All you need to do is 5 1/4 Divide by 1 1/8. And you get the answer.
hope this helps!
Answer:
The multiplicity of the root is 1
Step-by-step explanation:
Firstly, we need to understand what multiplicity is
By multiplicity, we simply refer to the number of times we have the certain root repeating itself
From the factorization, each of the given roots were only repeated once
That indicates that the given multiplicity is 1