Answer:
y = -5
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-9 = 2(18) + 9y
<u>Step 2: Solve for </u><em><u>y</u></em>
- Multiply: -9 = 36 + 9y
- Subtract 36 on both sides: -45 = 9y
- Divide both sides by 9: -5 = y
- Rewrite: y = -5
<u>Step 3: Check</u>
<em>Plug in y to verify it's a solution.</em>
- Substitute: -9 = 2(18) + 9(-5)
- Multiply: -9 = 36 - 45
- Subtract: -9 = -9
3x = 72 /3
X = 24
X^3 = 72
X = (72)^(1/3)
X= 4.160167646
Answer:
y = 4x + 5
Step-by-step explanation:
y - y1 = m(x-x1)
y + 7 = 4 (x + 3)
y + 7 = 4x + 12
y + 7 - 7 = 4x + 12 - 7
y = 4x + 5
Answer:
6 is larger unless -45 is in brackets then its bigger
Step-by-step explanation:
No negative number is bigger than positive numbers, unless it has brackets
Answer:
5 km/h
Step-by-step explanation:
Let x km/h be Ed's rate in the evening, then x+1 km/h is his rate in the morning. It takes him
- hours in the morning to pass 12 km;
- hours in the evening to pass 12 km.
In total, it takes him 5 hours 24 minutes ( hours), then
Solve this equation:
Ed's rate cannot be negative, thus x=4 km/h. His morning rate is x+1=5 km/h.