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ivanzaharov [21]
3 years ago
5

Factor the expression completely. -8x - 16

Mathematics
1 answer:
Akimi4 [234]3 years ago
4 0

Answer:

-8x -16

-8( x + 2 )

......

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During a test period, an experimental group of 10 vehicles using an 85 percent ethanol-gasoline mixture showed mean CO2 emission
Zinaida [17]

Answer:

-1.683

Step-by-step explanation:

Given :

Group 1 :

x1 = 667 ; n1 = 10 ; s1 = 20

Group 2 :

x2 = 679 ; n2 = 14 ; s2 = 15

The test statistic assuming equal variance :

x1 - x2 / √[Sp² * (1/n1 + 1/n2)]

sp² = [(n1 - 1)*s1² + (n2 - 1)*s2²] ÷ (n1 + n2 - 2)

Sp² = [(10 - 1)*20² + (14 - 1)*15²] = 296.59

Test statistic =

(667 - 679)/ √[296.59 * (1/10 + 1/14)]

-12 / 7.1304978

Test statistic = - 1.682

8 0
2 years ago
Please help IM SO CONFUSED!
rodikova [14]

Answer:

18

Step-by-step explanation:

You can see from the table that 2 bracelets are made every 30 minutes.

There are 9 intervals of 30 minutes each in 4.5 hours.

So, the number of bracelets that are made in 4.5 hours is

9x2=18

Another way to see this is to note from the table that 4 bracelets are made in 60 minute, which is 1 hour.  So, in 4 hours, 16 bracelets will be made. Also, from the table, 2 bracelets are made in 30 minutes, which is 1/2 hour.  So, adding up, 18 bracelets are made in 4.5 hours.

4 0
3 years ago
(English to algebra) twice the difference of w less than five
denpristay [2]

i believe its 2(5-w)

5 0
3 years ago
Read 2 more answers
How do you calculate the common difference?
SCORPION-xisa [38]

Answer:

<h3>                second term minus first term   </h3>

Step-by-step explanation:

Difference is a result of subtracting (not dividing!)

To calculate difference between two terms we have to subtract the previous from the next:

d=a_2-a_1=a_3-a_2=a_4-a_3=...=a_n-a_{n-1}

7 0
3 years ago
Find the slope of a line perpendicular to each given line.<br> y = 1/4x - 4
Valentin [98]

y=4

4x−4

Step-by-step explanation:

cant explain rn

3 0
2 years ago
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