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CaHeK987 [17]
3 years ago
11

What is seven eighths minus one fourth?

Mathematics
2 answers:
denis-greek [22]3 years ago
8 0

Answer:

77.75

Step-by-step explanation:

78-.25=77.75

SashulF [63]3 years ago
3 0

first find a common denominator

the common denominator is 8

since the denominator of the fraction 7/8 is already 8, it stays the same

now for the second fraction, since the denominator is 4 and you multiply 4 by 2 to get 8, multiply the numerator of the fraction1/4 by 2 as well

now your two fractions are 7/8-2/8

since the denominators are the same you just have to subtract the numerators

7-2=5

the answer is 5/8

Hoped this helped :)

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In a sample of 800 people, 420 are in favor of a proposed scoring system. A golf course wants to implement an electronic scoring
Allisa [31]

Answer:

We accept H₀ with 95 % of Confidence Interval we have enough evidence to conclude that the majority of members agree with the new system

Step-by-step explanation:

Sample size      800

Sample   x₁   = 420   ( number of people in favor of a proposed scoring system), then

p₁ = 420/800   p₁  =  0,525    p₁  = 52,5 %  then

q₁  =  1  - p₁     q₁  =  1  - 0,525      q₁  =  0,475

Sample size enought to use the approximation of the binomial didtribution to normal distribution

If significance level is 0,05    α  = 0,05

and from z-table we look for z(c)  ( z critical value)

z (c)  = 1,64

Hypothesis Test:

Null Hypothesis                       H₀            p₁  = 0,5

Alternative Hypothesis           Hₐ            p₁  >  0,5

Alternative hypothesis tells us about a one tail-test to the right

To calculate

z(s) =  (  p₁  -  0,5) / √ (p₁*q₁) / n

z(s) =   0,025 / √ 0,525*0,475/800

z(s) =   0,025 / √0,000311

z(s) = 0,025/0,01765

z(s) = 1,416

Comparing z(c)  and z(s)

z(s) < z(c)       1,416 <  1,64

z(s) is in the acceptance region we accep H₀.

5 0
3 years ago
N(-2,-2) after a 90 degree counterclockwise rotation
Novay_Z [31]

Answer: (2,-2)

Step-by-step explanation:

Rotating 90 degrees counterclockwise (about the origin) maps (x,y) onto (-y,x), so the answer is <u>N'(2,-2)</u>

5 0
1 year ago
Find the midpoint of the segment with endpoints (8, 10) and (5, 2).
Rom4ik [11]

Answer:

midpoint is at (6.5, 6) im pretty sure, im sorry if im wrong

Step-by-step explanation:

5 0
2 years ago
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A basketball team has 8 players. In how many different ways can the coach select 2 players to be the captains for tonight's game
Basile [38]
Since the problem is not concerned about the order of choosing the captain, the concept used is the combination. From 8 players, 2 are to be chosen,
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Use the formula:
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8 0
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