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3 years ago

Heyyo, can I get some help?

Mathematics

1 answer:

Sonja [21]3 years ago

7 0

Answer:

C) Square half of $\frac{2}{5}$ and add to both sides; $\frac{1}{25}$

Step-by-step explanation:

x² + $\frac{2}{5}$ x + c

c = ( $\frac{1}{2}$ × $\frac{2}{5}$ )² = ( $\frac{1}{5}$ )² = $\frac{1}{25}$

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The level of nitrogen oxides (NOX) in the exhaust after 50,000 miles or fewer of driving of cars of a particular model varies No

Greeley [361]

Answer:

For a level of 0.0174 or more of nitrogen oxide, the probability of fleet is 0.01.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 0.02 g/mi

Standard Deviation, σ = 0.01 g/mi

Sample size, n = 81

We are given that the distribution of level of nitrogen oxides is a bell shaped distribution that is a normal distribution.

Standard error due to sampling:

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{0.01}{\sqrt{81}} = 0.0011$

Formula:

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

We have to find the value of x such that the probability is 0.01

P(X > x)

$P( X > x) = P( z > \displaystyle\frac{x - 0.02}{0.0011})=0.01$

$= 1 -P( z \leq \displaystyle\frac{x - 0.02}{0.0011})=0.01$

$=P( z \leq \displaystyle\frac{x - 0.02}{0.0011})=0.99$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 0.02}{0.0011} = -2.326\\\\x = 0.0174$

For a level of 0.0174 or more of nitrogen oxide, the probability of fleet is 0.01.

5 0

3 years ago

Math help picture below

alex41 [277]

The figure is a cuboid.

Hence, parallel edges to AH are BD, PY, and MK.

Hence, the answer is A and B.

6 0

3 years ago

A square with sides of length 5 is positioned inside a square with sides of length 7. What is

kow [346]

Answer: 24cm²

Step-by-step explanation:

Let square with length 5cm be represented with A, and square with 7cm be represented with B.

Area of a square is L²

Square A will have an area of 5² = 25cm²

Square B will have an area of 7² = 49cm²

Total area between the two squares will be = Area of Square (B - A)

i.e.

Total Area = 49cm² - 25cm² = 24cm²

3 0

3 years ago

Can someone pls help with this? i’ll give brainliest :)

raketka [301]

Answer:

D (I think)

Step-by-step explanation:

I used a right triangle calculator and that was the answer

Below is the process the calculator did, hope it helps.

$c = \sqrt{a^{2} +b^{2}$

$\sqrt{12^{2} + 9^{2} } = 15$

6 0

3 years ago

Please help, Multiple choice

Leni [432]

Answer: A

Step-by-step explanation: when the ratios of apples to plums (9:15) is simplified, it is 3:5

7 0

3 years ago

Read 2 more answers