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2 years ago

NEED HELP PLEASE HELP

Mathematics

1 answer:

trasher [3.6K]2 years ago

5 0

Answer:

all my guy

Step-by-step explanation:

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Need help asap......

Korvikt [17]

Answer:

Step-by-step explanation:

$(2x+20)+3x=180\\5x+20=180\\5x=180-20=160\\x=160/5=32$

6 0

2 years ago

Michael mows 1/6 of an acre in 1/4 of an hour. How many acres does Michael mow per hour?

Igoryamba

Answer 4/6 of an acre, or 2/3 acres simplified.

5 0

3 years ago

A recently admitted class of graduate students at a large state university has a mean GRE verbal score of 650 with a standard de

hjlf

Answer:

The answer is below

Step-by-step explanation:

The z score is a score used to determine the number of standard deviations by which the raw score is above or below the mean, it is given by the equation:

$z=\frac{x-\mu}{\sigma} \\\\\mu=mean, \sigma=standard\ deviation,x=raw\ score\\\\for\ a\ sample\ n:\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }$

Given that μ = 650, σ = 50. To find the probability that 5 students who have a mean of 490, we use:

$z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{490-650}{50/\sqrt{5} } =-7.16$

From the normal distribution table, P(x < 490) = P(Z < -7.16) = 0.0001 = 0.01%

Since only a small percentage of people score about 490, hence the local newspaper editor should write a scathing editorial about favoritism

4 0

3 years ago

What is ...

Brut [27]

$\dfrac{14+a}{13}=12$
$14+a=13\cdot 12$
$14+a=156$
$a=156-14$
$\boxed{a=142}$

8 0

3 years ago

Help me find the volume please!

posledela

Cheating in 2019 the wave

7 0

2 years ago