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3 years ago

(5x^2−3x−2)−(−2x^2−x+10) Express the answer in standard form

Mathematics

2 answers:

masha68 [24]3 years ago

7 0

Answer:

7x2−2x−12

Step-by-step explanation:

Marizza181 [45]3 years ago

4 0

Answer: =7x^2-2x-12

Step-by-step explanation:

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The difference of two numbers is 6. find the smallest possible product.

nirvana33 [79]

The minimum product would be -9

8 0

4 years ago

Please help what is the answer to this<br> Logx + 2Log5

melomori [17]

Answer:

log 0 is undefined. It's not a real number, because you can never get zero by raising anything to the power of anything else

Step-by-step explanation:

I'm sorry it did not help

5 0

3 years ago

After collecting the data, Christopher finds that the total snowfall per year in Reamstown is normally distributed with mean 94

olga_2 [115]

Answer:

0.9987

Step-by-step explanation:

Using Z score formula

z = (x-μ)/σ, where

x is the raw score = 52 inches

μ is the population mean = 94 inches

σ is the population standard deviation = 14 inches

z = 52 - 94/14

z =-3

Probability value from Z-Table:

P(x<52) = 0.0013499

P(x>52) = 1 - P(x<52)

P(x>52) = 1 - 0.0013499

= 0.99865

Therefore, the probability that, in a randomly selected year, the snowfall was greater than 52 inches is approximately 0.9987

4 0

3 years ago

A painter can paint a building in 15 days and a coworker can do the same job in 10 days. If the first painter starts and 3 days

Sonja [21]

Answer: 7.8 days

<u>Step-by-step explanation:</u>

Painter can get the job done in 15 days so gets $\dfrac{1}{15}$ of the job done in 1 day.

Coworker can get the job done in 10 days so gets $\dfrac{1}{10}$ of the job done in 1 day.

Together, they get $\dfrac{1}{15}+\dfrac{1}{10}$ of the job done in 1 day.

Painter worked for 3 days so completed $\dfrac{1}{15}(3)=\dfrac{1}{5}$ of the job.

That leaves a remaining of $1-\dfrac{1}{5}=\dfrac{4}{5}$ of the job to be completed.

Let x represent the number of days it will take them to work together.

Painter + Coworker = Together

$\dfrac{1}{15}(x)\quad +\quad \dfrac{1}{10}(x)\quad =\quad \dfrac{4}{5}$

Multiply by 30 to eliminate the denominator:

$\dfrac{1}{15}(x)(30) +\ \dfrac{1}{10}(x)(30) = \dfrac{4}{5}(30)$

Simplify and solve for x:

2x + 3x = 24

5x = 24

$x=\dfrac{24}{5}$

x = 4.8

Remember that Painter worked 3 days alone in addition to the 4.8 days they worked together.

So the total time to paint the building is 3 + 4.8 = 7.8

7 0

4 years ago

Stephanie took a science exam that had two parts. Part 1: She got 16 questions correct, which was 45 of the number of part 1 que

nasty-shy [4]

Answer:

Step-by-step explanation:

Let x and y be the total number of questions in part 1 and part 2 exams respectively.

For part 1:

Number of correct question = 4/5 of the total number of question in part 1

$\Rightarrow 16=\frac{4}{5}\times x$

$\Rightarrow x=20$

For part 2:

Number of corrected question = 2/3 of total number of question in part 2

$\Rightarrow 16=\frac{2}{3}\times x$

$\Rightarrow x=24$

So, the total umbers of the questions on Stephanie's exam

=x+y

=20+24

=44

Hence, the total umbers of the questions on Stephanie's exam was 44.

3 0

4 years ago