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2 years ago

Molly has $3 in her wallet if this is 10% of her monthly allowance what is your monthly allowance

Mathematics

2 answers:

Marina CMI [18]2 years ago

8 0

She gets $30 dollars a month as her allowance

Her allowance in a year would be 360

geniusboy [140]2 years ago

4 0

Her monthly allowance is $30.

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Jose buys cookies and oranges at the store. He pays a total of \$49.82 He pays a total of $4.81 for the cookies . He buys 7 bags

Ierofanga [76]

Answer:

7x+4.81=49.82x

x=6.43

3 0

2 years ago

If f(x)=x-1/x g(x)=x-1 and h(x)=x+1 what is (g•h•f)(x)

eimsori [14]

Answer:

( f o f )(x) = f ( f (x))

= f (2x + 3)

= 2( ) + 3 ... setting up to insert the input

= 2(2x + 3) + 3

= 4x + 6 + 3

= 4x + 9Step-by-step

explanation:

8 0

3 years ago

Read 2 more answers

"A cable TV company wants to estimate the percentage of cable boxes in use during an evening hour. An approximation is 20 percen

Marizza181 [45]

Answer:

The company should take a sample of 148 boxes.

Step-by-step explanation:

Hello!

The cable TV company whats to know what sample size to take to estimate the proportion/percentage of cable boxes in use during an evening hour.

They estimated a "pilot" proportion of p'=0.20

And using a 90% confidence level the CI should have a margin of error of 2% (0.02).

The CI for the population proportion is made using an approximation of the standard normal distribution, and its structure is "point estimation" ± "margin of error"

[p' ± $Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ ]

Where

p' is the sample proportion/point estimator of the population proportion

$Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ is the margin of error (d) of the confidence interval.

$Z_{1-\alpha /2} = Z_{1-0.05} = Z_{0.95}= 1.648$

$d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$

$d *Z_{1-\alpha /2}= \sqrt{\frac{p'(1-p')}{n} }$

$(d*Z_{1-\alpha /2})^2= \frac{p'(1-p')}{n}$

$n*(d*Z_{1-\alpha /2})^2= p'(1-p')$

$n= \frac{p'(1-p')}{(d*Z_{1-\alpha /2})^2}$

$n= \frac{0.2(1-0.2)}{(0.02*1.648)^2}$

n= 147.28 ≅ 148 boxes.

I hope it helps!

3 0

3 years ago

2×+3 for x=3 I got 2 so I was seeing if I got it right

elena-s [515]

It would be 9 because 2 x 3 = 6 and then 6 + 3 = 9

7 0

3 years ago

Read 2 more answers

Can some please help me do this? Thanks

madreJ [45]

Slope intercept form is y=MX+b.
M is the slope, x is the x intercept, and b is the y intercept

the slope is
$\frac{ - 2}{1}$
An intercept is where the formula crosses the axis. therefore, the x intercept is .5, and the y intercept is 1
so the point slope formula is
$y = \frac{ - 2}{1} 0.5 + 1$

4 0

2 years ago

Read 2 more answers