There are 217 chairs cleared and 36 chairs left
ANSWER:
equation:
217 + 36 = 253
Answer:
A
C
i don't get the first slide
Step-by-step explanation:
Answer:
C. (3, -3)
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
<u>Algebra I</u>
- Solving systems of equations using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define systems</u>
7x + 3y = 12
7x - 3y = 30
<u>Step 2: Solve for </u><em><u>x</u></em>
- Eliminate <em>y</em>: 14x = 42
- Isolate <em>x</em>: x = 3
<u>Step 3: Solve for </u><em><u>y</u></em>
- Substitute in <em>x</em>: 7(3) + 3y = 12
- Multiply: 21 + 3y = 12
- Isolate <em>y</em> term: 3y = -9
- Isolate <em>y</em>: y = -3
And we have our final answer!
Answer:
a68 = -85.2
Step-by-step explanation:
The formula for an arithmetic sequence is
an = a1+d(n-1)
a1 =8.6 (it is the first term)
We can find the common difference by taking the second term and subtracting the first term
7.2-8.6 =-1.4
d=-1.4
n = the term number we are looking for
an = 8.6 -1.4(n-1)
We are looking for the 68th term so n=68
a68 = 8.6 -1.4(68-1)
= 8.6 -.1.4(67)
= 8.6-93.8
=-85.2
first set the first equation equal to x
subtract 2y from both sides
x=27-2y now plug this in to the other equation
2(27-2y)+3y=46 distribute
54-4y+3y=46 --> 54-y=46 now subtract 54 from both sides -y=-8 --> D)y=8
If you weren't asked to show work you could just plug the choices given into the equation