Answer:
D x=-12
Step-by-step explanation:
3-x=-9
-9-3=x
-12=x
Answer:
x² - x + 4
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
Step-by-step explanation:
<u>Step 1: Define</u>
(6x² - 10x + 9) + (-5x² + 9x - 5)
<u>Step 2: Simplify</u>
- Combine like terms (x²): x² - 10x + 9 + 9x - 5
- Combine like terms (x): x² - x + 9 - 5
- Combine like terms (Z): x² - x + 4
Answer:
letter A
Step-by-step explanation:
This is made up of 4 triangular segments. If we assume the cross section is perpendicular then we can use the 1/2b*h formula for each piece with the given values. So we have 2 triangles with the formula: 1/2(3)*(4.5)=6.75 * 2 triangles = 13.5.
Then for the bottom 2 you have 1/2(3)*7.5=11.25, times 2 triangles =22.5
So, 13.5+22.5=36, or letter A
110 students are going on a trip, and each student needs one water bottle.
So we multiple 110 students* 1 water bottle each to get 110 water bottles are needed for all the students.
There are 6 water bottles in a pack- and we need 110 water bottles.
So divide the number of water bottles needed by the amount in a pack.
110/6= 18 1/3
We need 18 packs a little bit more- so we round 18 up because we can't buy 1/3 of a pack or have students go thirsty.
So we need 19 packs of water for the students on the trip.
Answer:
126
Step-by-step explanation:
a = 22
d = 22- 20 = -2
n = 9
Sn = 0.5n(2a +d(n-1))
=0.5 * 9 (2 *22 +-2(9-1))
= 126
