-2x2+x+8=0 use the quadratic formula to solve the equation

Answers

Answer 1

Answer: x = -1 is the answer to -2x2+x+8=0

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A 5 gallon mixture contains 40% acid. A 3 gallon mixture contains 50% acid. What percent is obtained by putting the two mixtures together?

Answers

(5/8)40 + (3/8)50 = 25 + 18.75 = 43.75%

In the number 913,256 what is the period that has the digits 913

Answers

The name of the period is the thousands period.

Thousands is the period

How do I set up the equation for this word problem? A takes 1/2 of the diamonds plus 1 from the table. B takes 2/3 of what remains. C takes 2/3 of what remains plus 1. One diamond is left. How many diamonds had originally been on the table? Answer is 38 but I don't know how to set it up.

Answers

The first thief takes (1/2 x + 1) . What remains ? x - (1/2x + 1)

So the 2nd thief takes 2/3 of [ x - (1/2x + 1) ]

What remains ? x - 2/3 [ x - (1/2x + 1) ]

So the 3rd thief takes 2/3 of { x - 2/3 [ x - (1/2x + 1) ] } and he takes 1 more .

What remains ? x - ( 2/3 { x - 2/3 [ x - (1/2x + 1) ] } + 1 )

And that whole ugly thing is equal to ' 1 ', so you can solve it for 'x'..

The whole problem from here on is an exercise in simplifying
an expression with a bunch of 'nested' parentheses in it.
===============================================
This is a lot harder than just solving the problem with logic and
waving your hands in the air. Here's how you would do that:

Start from the end and work backwards:

-- One diamond is left.
-- Before the 3rd thief took 1 more, there were 2.
-- That was 1/3 of what was there before the 3rd man took 2/3.
So he found 6 when he arrived.
-- 6 was 1/3 of what was there before the second thief helped himself.
So there were 18 when the 2nd man arrived.
-- 18 was 1 less than what was there before the first thief took 1 extra.
So he took his 1 extra from 19.
-- 19 was the remaining after the first man took 1/2 of all on the table.
So there were 38 on the table when he arrived.

Thank you for your generous 5 points.

Please help fast! I'll mark brainliest rate 5 and thank if you get it right/answer FAST Georgia has at most $100 to spend at the outlet mall. She wants to buy a swimsuit for $60 and spend the rest on earrings. Each pair of earrings cost $10.75.
Which inequality can be used to determine the maximum number of pairs of earrings Georgia can buy?
A. 60 – 10.75x≤ 100
B. 60 + 10.75x≤ 100
C. 60 – 10.75x≥ 100
D. 60 + 10.75x≥ 100

Answers

total cost is less than or equal to 100 sice cant spend more than have
cost<100
cost=swim+earings
costearings=xearints imes 10.75
swim=60

60+10.75x<100

B

Answer:

Step-by-step explanation:

What are three rational numbers between 0.2 and 0.3 (one must be a fraction)?

Answers

it would be 2/5 but the numbers between is 2/10 and 3/10

The answer will be 0.6 Hopes this helps. :)

Sam cut 62 and 1/2 inches of ribbon into 4 equal hair ribbon how long was each hair ribbon

Answers

If the total length of ribbon is 62 and 1/2 inches, or 62.5 inches, and he cut it in to 4 equal parts then:

62.5/4 = x
x = 15.625 inches

Each ribbon is 15.625 inches.

^^^^^^^^ That Would Be It.. I Think

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