2 years ago

Simplify: (3) + (-4)

Mathematics

1 answer:

nikitadnepr [17]2 years ago

3 0

Answer:

it should -1 because you have to evaluate the number

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Trash-A-way charges $25 per month with an additional $0.25 per pound of trash that they pick up from your house. Garbage -No-Mor

goldenfox [79]

25 + 0.25x=45

0.25x=20

x= 20/0.25 = 80

so 80 pounds of trash

3 0

3 years ago

Suppose you do an analysis of the starting salaries of 100 recent Lehman graduates. You find that the average starting salary is

madreJ [45]

Answer:

a) (59180,60820)

b) (59020,60980)

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $60,000

Standard Deviation, σ = $5,000

Sample size, n = 100

a) 90% critical values

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.10} = 1.64$

$60000 \pm 1.64(\frac{5000}{\sqrt{100}} ) = 60000 \pm 820 = (59180,60820)$

b) 95% critical values

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$60000 \pm 1.96(\frac{5000}{\sqrt{100}} ) = 60000 \pm 980= (59020,60980)$

5 0

2 years ago

If two lines are perpendicular, which statement must be true?

Kryger [21]

Answer:

Their slopes are opposites

8 0

2 years ago

given total 72 stitches and 1 stitch takes 1/4 inch, so total yarn used : 18 inch 36 inch = 3 feet = 1 yard divide by 2 18 inch

dezoksy [38]

I hope this helps you

if 1 stitch 1/4 inch

72 stitches ? inches

?=72.1/4

?=18 inches

8 0

3 years ago

Write an epression that shows how to multiply 7×256 using expanded form and the Distributive Property

posledela

It wants expanded form and the distributive property (something like 2(5+6b), so I would think it wants something like 7(200+50+6). This way, you're multiplying 7 by each expanded part of the number, which you would do anyway when solving like normal. Please correct me if I'm wrong!

4 0

2 years ago