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2 years ago

0.4x-0.25=1.75A. x=2 B. x=5 C. x=1.5 D.x=5.2

Mathematics

1 answer:

lisov135 [29]2 years ago

5 0

X = 5 is the answer :)

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The janitor at a school discovered a leak in a pipe. The janitor found that it was leaking at a rate of 11 fl oz per hour. How f

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He is leaking 2.1 gallons a day

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3 years ago

The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. Wh

Alla [95]

Answer:

2.3%

Step-by-step explanation:

The formula to convert x into z distribution is

$z=\frac{x-\mu}{\sigma}$

Where z is the test statistic

x is what we are looking for (in this case 37)

$\mu$ is the mean (in this case, it is 25)

$\sigma$ is the standard deviation (we have 6)

<em>Plugging these into the formula, we get:</em>

$z=\frac{x-\mu}{\sigma}\\z=\frac{37-25}{6}\\z=2$

Thus we can say we want $P(z\geq 2)$

<u>Note: </u> $P(z\geq a)=1-P(z\leq a)$

The table given is for any z where $P(z\leq a)$

Thus, now we have:

$P(z\geq 2)\\=1-P(z\leq 2)\\=1-0.9772\\=0.0228\\$

0.0228 into percentage is 0.0228 * 100 = 2.28%

Rounded, we get 2.3%

Third answer choice is right.

3 0

3 years ago

Factor each trinomial. Then match the polynomial (term) on the left with its factored form (definition) on the right.

meriva

X² - 8x - 20 factors to give option
B) (x - 10)(x + 2)
x² + 8x - 20 factors to give option
A) (x - 2)(x + 10)
x² - x - 20 factors to give option C) (x - 5)(x + 4)
and x² - 9x - 20 is option D) Prime.

I hope this helps!

8 0

3 years ago

Read 2 more answers

Plz help me out with this and do show work I will be waiting.... btw u will be marked brainliest!!!!!! Fast plz

pychu [463]

Answer:

x=16°

Step-by-step explanation:

5*x-30=2*(x+18)

For the second, I'd say it is:

5*x-30=2*x+18

Let's solve both.

5*x-30=2*(x+18)

5x-30=2x+36

3x=66

x=22

5*x-30=2*x+18

3x+48

x=16°

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3 years ago

165 is what percent of 750?

Elza [17]

Your answer is...…

(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ ✧ﾟ･: *ヽ(◕ヮ◕ヽ)

22!

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3 years ago

Read 2 more answers

0.4x-0.25=1.75A. x=2 B. x=5 C. x=1.5 D.x=5.2​

0.4x-0.25=1.75A. x=2 B. x=5 C. x=1.5 D.x=5.2