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blsea [12.9K]
3 years ago
13

Answer these year 7 math questions please ty !

Mathematics
2 answers:
Dafna11 [192]3 years ago
8 0
Hi!
1) 4 - 5x
2) 5x - 4
hope this helps :)
ankoles [38]3 years ago
3 0

Answer:

4-5x

5x-4

Step-by-step explanation:

You might be interested in
Recently, TWA reported an on-time arrival rate of 78.4%. Assume that a later random sample of 750 flights results in 630 that ar
WINSTONCH [101]

Answer:

Step-by-step explanation:

1. Null hypothesis: u <= 0.784

Alternative hypothesis: u > 0.784

2. Find the test statistics: z using the one sample proportion test. First we have to find the standard deviation

Using the formula

sd = √[{P (1-P)}/n]

Where P = 0.84 and n = 750

sd =√[{0.84( 1- 0.84)/750]}

sd=√(0.84 (0.16) /750)

SD =√(0.1344/750)

sd = √0.0001792

sd = 0.013

Then using this we can find z

z = (p - P) / sd

z = (0.84-0.784) / 0.013

z =(0.056/0.013)

z = 4.3077

3. Find the p value and use it to make conclusions...

The p value at 0.02 level of significance for a one tailed test with 4.3077 as z score and using a p value calculator is 0.000008254.

4. Conclusions: the results is significant at 0.02 level of significance suck that we can conclude that its on-time arrival rate is now higher than 78.4%.

5 0
3 years ago
3. A wall is 12 feet high. If its area is 132 sq ft, what is its
dalvyx [7]

B. 46 feet because 132/12=11 and 12+12+11+11=46

5 0
3 years ago
The perimeter of a square is 40 inches...Determine the area of the square ... A.) 160 square inches B) 10 square *inches C) 100
marysya [2.9K]
P=4s

s=p/4

a=s^2, using s found above

a=p^2/16, we were told that p=40 so

a=40^2/16

a=100 in^2
4 0
3 years ago
BRAINLIEST, THANKS, 5 STARS ! Correct and fast answers needed!
charle [14.2K]

Answer:

x+2

Step-by-step explanation:

x^3+6x^2+11x+6/x^2+4x+3

= x^3+6x^2+11x+6/x^2+4x+3

= (x+1)(x+2)(x+3)/(x+1)(x+3)

=x+2

7 0
2 years ago
HELPPPP. EXPLAIN IT IN 2 SENTENCES
schepotkina [342]
B for 8 would be 6.2 
b for 9 would be 7
The b is adding 0.8 each time
Hope this helps!
6 0
3 years ago
Read 2 more answers
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