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3 years ago

3x(2x-1)-(2x+3)(2x+3)

Mathematics

1 answer:

Alexxx [7]3 years ago

6 0

The answer is negative 2x squared minus 3x

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Please help solve this SAT math problem. I have 4 more like these so need help with this so that I can solve the rest by myself.

stealth61 [152]

The notation just means

(f/g)(-4) = f(-4) / g(-4)

If f(x) = x² + 2 and g(x) = 1 - 3x, then

f(-4) = (-4)² + 2 = 16 + 2 = 18

g(-4) = 1 - 3 (-4) = 1 + 12 = 13

and so

(f/g)(-4) = 18/13

8 0

3 years ago

What is 5 times 5 I need to know

erastova [34]

25 there is something called a calculated just letting u know :)))

8 0

3 years ago

Read 2 more answers

Kristy earns $134 each day she works. Every day she spends $8 on breakfast and $12 on lunch. How much money will she have in 25

GaryK [48]

Answer:

Money she have in 25 days = $2850

Money she have in 50 days = $5700

Step-by-step explanation:

Kristy earns each day = $134

Spends on breakfast & lunch = $8 + $12 = $20

Reaming about each day = $134 - $20

= $114

Money she have in 25 days = 25 x $114

= $2850

Money she have in 50 days = 50 x $114

= $5700

7 0

3 years ago

For women aged 18-24, systolic blood pressures are normally distributed with a mean of 114.8 mm Hg and a standard deviation of

NNADVOKAT [17]

Answer:

0.0579 is the probability that mean systolic blood pressure is between 119 and 122 mm Hg for the sample.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 114.8 mm Hg

Standard Deviation, σ = 13.1 mm Hg

Sample size = 23

We are given that the distribution of systolic blood pressures is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling:

$\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{13.1}{\sqrt{23}} = 2.731$

P(blood pressure is between 119 and 122 mm Hg)

$P(119 \leq x \leq 122) = P(\displaystyle\frac{119 - 114.8}{2.731} \leq z \leq \displaystyle\frac{122-114.8}{2.731}) = P(1.537 \leq z \leq 2.636)\\\\= P(z \leq 2.636) - P(z < 1.537)\\= 0.9958 - 0.9379 = 0.0579= 5.79\%$

$P(119 \leq x \leq 122) = 5.79\%$

0.0579 is the probability that mean systolic blood pressure is between 119 and 122 mm Hg for the sample.

8 0

3 years ago

What would 4o% of $32 equal out to be

lana66690 [7]

40% of $32 is $12.80

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4 years ago