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3 years ago

I need help, please im stuck on this problem

Mathematics

2 answers:

Volgvan3 years ago

5 0

Answer:

9.2(2.54 cm)=23.368=23.37cm

Step-by-step explanation:

Brainliest plss

pashok25 [27]3 years ago

4 0

Answer:

23cm

Step-by-step explanation:

When converting inches to centimeters the formula is in x 2.54, 9.2 x 2.54=23.368, 23cm!! Hope this helps!

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What’s the product of -3/4(-4)

navik [9.2K]

The product is 3 because -3/4 * -4 is 3

8 0

3 years ago

Line k is graphed at right.

saw5 [17]

Answer:

See below ↓↓

Step-by-step explanation:

Equation of line k

y = mx + b
m = Δy/Δx (ratio of change in y to change in x) = 2/3
b = 3 (as y-intercept is [0,3])
⇒ y = 2/3x + 3

a. parallel line

For parallel lines, slope (m) remains the same, but the y-intercept (b) changes
⇒ y = 2/3x + 1

b. perpendicular line

For perpendicular lines, the slope (m) is the negative reciprocal of the original line and the value of b stays the same [it can be any point as long as it intersects the line]
⇒ y = -3/2x + 1

5 0

2 years ago

Please help!!! Intersection of chords use formula a•b=c•d

scoray [572]

Given:

Length of chords of one segment = 11 and 8

Length of chords of other segment = 2 and x

To find:

The value of x.

Solution:

If two chords intersect each other inside a circle, the products of length their segments are equal.

$\Rightarrow a \cdot b =c \cdot d$

$\Rightarrow 11 \cdot 8 =2 \cdot x$

$\Rightarrow 88 =2x$

Divide by 2 on both sides.

$$\Rightarrow\frac{88}{2} =\frac{2x}{2}$

$$\Rightarrow 44 =x$

Switch the sides.

$$\Rightarrow x=44$

The value of x is 44.

5 0

4 years ago

g In 2013, the Pew Research Foundation reported that 43% of U.S. adults report that they live with one or more chronic condition

SOVA2 [1]

Answer:

We are 95% confident that the true proportion of U.S. adults who live with one or more chronic conditions is between 39.7% and 46.33%

Step-by-step explanation:

From the question we are told that

The sample proportion is $\r p = 43\% = 0.43$

The standard error is $SE = 0.017$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = (100-95)\%$

=> $\alpha = 0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * SE$

=> $E = 1.96 * 0.017$

=> $E = 0.03332$

Generally 95% confidence interval is mathematically represented as

$\r p -E < p < \r p +E$

=> $0.43 -0.03332 < p < 0.43 + 0.03332$

=> $0.39668 < p < 0.46332$

Converting to percentage

$(0.39668 * 100)< p < (0.46332*100)$

$39.7\% < p < 46.33 \%$

7 0

3 years ago

Find the average rate of change of f ( x ) = 3 x 2 − 9 on the interval [ 2 , b ] . Your answer will be an expression involving b

iVinArrow [24]

Answer:

$m = 3b+6$

Step-by-step explanation:

Given

$f(x)=3x^2 - 9$

Required

The average rate over $[2,b]$

Average rate (m) is calculated using:

$m = \frac{f(b) - f(a)}{b - a}$

Where

$[a,b] = [2,b]$

So, we have:

$m = \frac{f(b) - f(2)}{b - 2}$

Calculate f(b) and f(2)

$f(x)=3x^2 - 9$

$f(b)=3b^2 - 9$

$f(2)=3*2^2 - 9 = 12 - 9 = 3$

So, we have:

$m = \frac{f(b) - f(2)}{b - 2}$

$m = \frac{3b^2 - 9 - 3}{b - 2}$

$m = \frac{3b^2 - 12}{b - 2}$

Expand the numerator

$m = \frac{3b^2 + 6b-6b-12}{b - 2}$

Factorize

$m = \frac{b(3b + 6)-2(3b+6)}{b - 2}$

Factor out 3b + 6

$m = \frac{(b -2)(3b+6)}{b - 2}$

Cancel out b - 2

$m = 3b+6$

4 0

3 years ago