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3 years ago

7

what is an equation to represent for (Andre withdrew spending money from his checking account that initially had $982. What was

the amount of his withdrawal, w, if his ending balance was $922)

1 answer:

Paul [167]3 years ago

6 0

Answer:

The Answer is w - 982 = 922 because it whatever money he took from the 982 lead to 922

Step-by-step explanation:

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A university surveyed recent graduates of the English department about their starting salaries. Four hundred graduates returned

Dafna1 [17]

Answer: (24755, 25245)

Step-by-step explanation:

Given : Sample size : n= 400

Sample mean : $\overline{x}= \$25,000$

Standard deviation : $\sigma=\$2,500$

Significance level : $\alpha: 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

The confidence interval for population mean is given by :-

$\overline{x}\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=25000\pm(1.96)\dfrac{2500}{\sqrt{400}}\\\\=25000\pm245\\\\=(25000-245,\ 25000+245)=(24755,\ 25245)$

Hence, the 95% confidence interval for the mean salary of all graduates from the English department is (24755, 25245)

8 0

3 years ago

I NEED HELP! simplify this expression

ioda

Answer:

25

Step-by-step explanation:

36-1*16+5 (PEMDAS, exponents first)

36-16+5 (PEMDAS, multiplication)

20+5 (PEMDAS, add and subtract left to right)

25 (PEMDAS, add and subtract left to right)

7 0

3 years ago

HELP WHOEVER ANSWERS FIRST WILL BE BRAINLIEST

Sholpan [36]

A straight line has a degree of 180 degrees.
So you are trying to find the angle that is created with the points j,m, and l.
so take the other angle 54 degrees and subtract that by 180.
180-54=126 degrees.
so now that you have the angle of J,M,L set that to equal 3x
3x=126
divide 3 from both sides
x= $\frac{126}{3}$
so x =42

Let me know if you have any questions.

Read more on Brainly.com - brainly.com/question/9937300#readmore

This is the exact same question as I just answered here: brainly.com/question/9937300

5 0

4 years ago

Help with this question (100 points)

Masteriza [31]

Answer:

y = $\frac{\pi}{3}$

Step-by-step explanation:

using the addition formula for sine

sin(x + y) = sinxcosy + cosxsiny

then

sinxcosy + cosxsiny = $\frac{1}{2}$ sinx + $\frac{\sqrt{3} }{2}$ cosx

for the 2 sides to be equal , then

cosy = $\frac{1}{2}$ and siny = $\frac{\sqrt{3} }{2}$

then

y = $cos^{-1}$ ( $\frac{1}{2}$ ) = $\frac{\pi }{3}$

and

y = $sin^{-1}$ ( $\frac{\sqrt{3} }{2}$ ) = $\frac{\pi }{3}$

thus y = $\frac{\pi }{3}$

6 0

2 years ago

Need help on this!

densk [106]

Answer:

125°

Step-by-step explanation:

A triangle is 180°. You already have 2 angle measures given.

30° + 25° = 55° 180° - 55° = 125°

Angle y is an obtuse angle, an angle measure greater than 90°.

4 0

3 years ago