-8+4x=-20x-25+7x
4x+20x-7x=-25+8
17x=-17 /17
x=-1
Answer:
1. x=7
2.x=6
3.x= -1/2
4.x=3
5.x=-18
6.x= -8/5
7. x=60
8. x=-3
9. x=3
10. x=0
Step-by-step explanation:
did them as fast i could
Answer:
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Slope Formula:
Step-by-step explanation:
<u>Step 1: Define</u>
<em>Find points from graph.</em>
Point (1, 1)
Point (3, -4)
<u>Step 2: Find slope </u><em><u>m</u></em>
Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>
- Substitute [SF]:
- Subtract:
Answer:
a. 2.5%
Step-by-step explanation:
The Z-score of the given test score is ...
Z = (X -μ)/σ = (700 -500)/100 = 2
The empirical rule tells you 95% of a normal distribution is within 2σ of the mean. The other 5% is split evenly between the two tails of the distribution, so the probability of a score 2σ or more above the mean is about 1/2×5% = 2.5%.
Answer:
A red 5 is chosen from the deck. The card is put back into the deck and the a red card is chosen.
Step-by-step explanation:
An independent event is one whose outcome is not dependent on any other event. There are two types of cards in the deck. If a red card is selected it will be from the series 1 - 20, if the card is put back into deck and then again a red card is selected it will be again from the series 1 - 20. This is an independent event since its outcome is same irrespective of the events.