All categories

2 years ago

I need help but like now

Mathematics

1 answer:

steposvetlana [31]2 years ago

3 0

Answer:

$65.00

Step-by-step explanation:

$60 +$ _ = $125.00

You might be interested in

Please will give brainliest and thanks

VMariaS [17]

Answer:

$- \frac{6}{7}p + \frac{1}{7}$

Step-by-step explanation:

Get rid of the parenthesis then combine like terms

8 0

3 years ago

A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level

cupoosta [38]

Answer:

The sample required is $n = 135$

Step-by-step explanation:

From the question we are told that

The standard deviation is $\sigma = 9$

The margin of error is $E = 2$

Given that the confidence level is 99% then the level of significance is mathematically evaluated as

$\alpha = 100-99$

$\alpha = 1 \%$

$\alpha = 0.01$

Next we will obtain the critical value $\frac{\alpha }{2}$ from the normal distribution table(reference math dot armstrong dot edu) , the value is

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 2.58$

The sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ]^2$

substituting values

$n = [ \frac{ 2.58 * 9 }{2} ]^2$

$n = 135$

3 0

2 years ago

What is y + 20 < 180? please help me

taurus [48]

Answer:

y < 160

Step-by-step explanation:

y + 20 < 180

-20 < -20

y < 160

y is less than 160

5 0

2 years ago

Read 2 more answers

Solve for a side in right triangles help

Pani-rosa [81]

Answer:

The length of AB is 7.45 units.

Step-by-step explanation:

You can find the length of AB using Cosine Rule, cosθ = adj./hypo. :

θ = 20°

adj. = 7 units

hypo. = AB

cos 20° = 7/AB

AB = 7/cos 20°

= 7.45 units (3s.f)

7 0

3 years ago

Read 2 more answers

Write an expression to express y in terms of x use your equation to complete the table

Fittoniya [83]

Answer:

The answer is 1

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers