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2 years ago

!!!!!!!!!!!!math is hard i could use some help i also raised the points and will mark brainliest uwu !!!!!!!!!!!!!!

Mathematics

1 answer:

elena-s [515]2 years ago

7 0

I think (jk) (x) means j times k

(jk) (x) = -7x(9 - 2x) //Using Distributive Property.

(jk) (x) = -63x + 14x^2 = 14x^2 - 63

//Hope it helps.

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Tan x=3/5 nearest tenth

dolphi86 [110]

Answer:

$x\approx31\°$

Step-by-step explanation:

Given expression:

$\tan x=\frac{3}{5}$

To solve for $x$ to nearest tenth.

Solution:

We have:

$\tan x=\frac{3}{5}$

In order to solve for $x$ we will tan inverse tan on both sides in order to isolate $x$ .

$\tan^{-1}(\tan x)=\tan^{-1}\frac{3}{5}$

$x=\tan^{-1}\frac{3}{5}$ [ Since $\tan^{-1}(\tan \theta)=\theta$ ]

$x=30.96\°$

We will round to nearest tenth. So,

$x\approx31\°$ (Answer)

7 0

2 years ago

A laboratory tested n = 98 chicken eggs and found that the mean amount of cholesterol was LaTeX: \bar{x}x ¯ = 86 milligrams with

Harrizon [31]

Answer:

1.3859

Step-by-step explanation:

The formula for Margin of Error is given as:

Margin of Error = Critical value × Standard Error

Critical value = z score

In the question, we are given a confidence interval of 95%.

Z score for a 95% confidence level is given as: 1.96

Hence, critical value = 1.96

Standard Error = σ / √n

Where n = number of samples = 98 chicken eggs

σ = Standard deviation = 7 milligrams

Standard Error = 7/√98

Standard Error = 0.7071067812

Hence, Margin of Error = Critical value × Standard Error

Margin of Error = 1.96 × 0.7071067812

Margin of Error = 1.3859292911

Therefore, the margin of error corresponding to a 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is approximately 1.3859

8 0

3 years ago

What is the measure of

Liula [17]

The angle of NPR is 130°

First, set up an equation to find x.

$(3x-10)+2x+65=180$

Then, solve the equation for x.

$x=25$

Then, substitute 25 in for x in 2x

Finally, subtract 50 from 180 to find the angle of NPR

130°

5 0

2 years ago

Help please i realllyy need help

vredina [299]

2 and 5/8: You would go from the number the fraction is closest to, and then add the fraction itself.

3 0

2 years ago

Read 2 more answers

Why is it valid to say that both a function and its inverse describe the same relationship

liberstina [14]

A comparison between a function and its inverse would show that the domain and range of the original function swap. The domain of the function becomes the range of the inverse, the range of the function becomes the domain of its inverse.

Looking at ordered pairs of the function and its inverse would look like this:

(2,4) on the original function becomes (4,2) on the inverse.

While the graph of a function and its inverse are noticeably different an important thing to note is that it is merely a reflection across the line y=x.

So even though they appear different you are looking at the same relationship just as y vs. x instead of x vs. y

4 0

3 years ago

!!!!!!!!!!!!~~math is hard i could use some help i also raised the points and will mark brainliest uwu ~~!!!!!!!!!!!!!!

!!!!!!!!!!!!math is hard i could use some help i also raised the points and will mark brainliest uwu !!!!!!!!!!!!!!