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3 years ago

(-4x2 + 3x + 3) – (4x2 + 9)

Mathematics

1 answer:

zhenek [66]3 years ago

3 0

Answer:

$-8x^{2}+3x-6$

Step-by-step explanation:

The image below shows step-by-step on how to simplify the expression.

Hope this helps! :)

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A fair spinner has 9 equal sections: 3 red, 2 blue and 4 green. It is spun twice. What is the probability of not getting two con

RUDIKE [14]

Answer:

8/9

Step-by-step explanation:

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4 years ago

A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time t

Mandarinka [93]

Answer:

(a) Confidence Interval for Route A is (38.61, 41.39)min

Confidence Interval for Route B is (42.07, 43.93)min

(b) No

Step-by-step explanation:

(a) Route A

Mean=40min, sd=3min, df=33.1, t=2.0675, n=20

CI = (mean + or - t×sd/√n)

CI = (40 + 2.0675×3/√20) = 40+1.39 = 41.39min

CI = (40 - 2.0675×3/√20) = 40 - 1.39 = 38.61min

CI for Route A is (38.61,41.39)min

Route B

Mean=43min, sd=2min, t=2.0675, n=20

CI = (43 + 2.0675×2/√20) = 43+ 0.93 = 43.93min

CI = (43 - 2.0675×2/√20) = 43 - 0.93 = 42.07min

CI for Route B is (42.07,43.93)min

(b) He should not believe the old timer's claim. The man saves an average of 3 minutes a day by driving Route A

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3 years ago

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landscaping company spreads 5/8 of a pound of grass seed over 5 lawns. how many pound of seeds did each lawn get.

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Answer:

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3 years ago

Jameson is seeking a loan with a simple interest rate of 3% per year. If he wants to borrow $8000, then how much will he be char

Thepotemich [5.8K]

Answer:

$960

Step-by-step explanation:

You are going to want to use the simple interest formula for this. The one below is modified for solving the interest earned.

$I=Prt$

I = interest amount

P = principal amount

r = interest rate (decimal form)

t = time

The first step is to change 3% into a decimal:

3% -> $\frac{3}{100}$ -> 0.03

Now, lets plug in the values into the equation:

$I=8,000(0.03)(4)$

$I=960$

Jameson will be charged $960 of interest after 4 years.

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3 years ago

1. At the gym on Monday, Larry is told to up his weight on the bench-press by 15% from last week. Last week he was bench-pressin

QveST [7]

Answer:

300 lbs

Step-by-step explanation:

We know that Larry bench pressed 200 lbs last week, and that he is supposed to increase by 15%. We know that any number times one is that same numbers. That means a number that is increaseing has to be greater than 1. So, we have to convert 15% into a decimal. That is 0.15. That plus one is 1.15. Now we just have to multiply 1.15 with 200. We get 300.

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2 years ago