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3 years ago

NEED HELP ASAP ITS DUE AT 12:00 AM 10 POINTS PICTURE IS INCLUDED

Mathematics

2 answers:

xz_007 [3.2K]3 years ago

6 0

Answer: I think it might be 8750 ?? Sorry if its wrong :<

Ulleksa [173]3 years ago

6 0

Answer:

Q1 is -12.4 Q2 is 7/9 Q3 - 1/5 Q4 is 0.2

Step-by-step explanation:

Q1-D

Q2-A

Q3-B

Q4-C

Main answer (7550)

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What is the answer for 0.8*-23+0.8*-7 with step by step

mariarad [96]

Answer:

-24.

Step-by-step explanation:

0.8*-23+0.8*-7

Use order of operation. Here we have 2 multiplications and one addition The multiplications are done first:

0.8*-23 + 0.8*-7

= -18.4 + -5.6

= -18.4 - 5.6

= -24.

8 0

3 years ago

A + 4 = 2b

Nataliya [291]

Answer:

a=21

b=25/2

c=77/2

Step-by-step explanation:

from eq 1

a+4=2b => a=2b-4

substituting value of a in eq 2

c-5=a+b => c-5=2b-4+b => c =3b+1

now, substituting value of a and c in eq 3

a+b+c=72 => 2b-4+b+3b+1 =72 => 6b-3=72 => b= 75/6 => b=25/2

substituting value of b in :

c=3b+1 ( you will get c )

then substitute value of b in :

a=2b-4 ( to get a)

5 0

3 years ago

What is the value of the expression 5×(3+6÷3)

jeka57 [31]

Answer:

The correct answer is 15

5 0

3 years ago

Determine the missing value, x, of the rectangular pyramid below, if the volume is 280 <br> cm3

ExtremeBDS [4]

Answer:

10 cm

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

A superintendent of a school district conducted a survey to find out the level of job satisfaction among teachers. Out of 53 tea

frez [133]

Answer:

b. 1.15

Step-by-step explanation:

The z statistics is given by:

$Z = \frac{X - p}{s}$

In which X is the found proportion, p is the expected proportion, and s, which is the standard error is $s = \sqrt{\frac{p(1-p)}{n}}$

Out of 53 teachers who replied to the survey, 13 claim they are satisfied with their job.

This means that $X = \frac{13}{53} = 0.2453$

She find that the proportion of satisfied teachers nationally is 18.4%.

This means that $p = 0.184$

Standard error:

p = 0.184, n = 53.

$s = \sqrt{\frac{0.184*0.816}{53}} = 0.0532$

Z-statistic:

$Z = \frac{X - p}{s}$

$Z = \frac{0.2453 - 0.184}{0.0532}$

$Z = 1.15$

The correct answer is:

b. 1.15

5 0

4 years ago