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anygoal [31]
3 years ago
7

PLEASE HELP!!!!!!!!!!!! julie wants to buy a pair of boots for $54.67 she is a size 8 1/2 medium in regular shoes what size shou

ld she get A. size 9 or B. size 9 1/2 ????????????????
Mathematics
1 answer:
vfiekz [6]3 years ago
8 0
I would put 9 and 1/2 because there boots they have about 1 size differnce
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Ten times the sum of half a number and 6 is 8
vredina [299]
Ten (10) times (multiplication) the sum (addition) of half (\frac{1}{2} a number (n) and 6 is (=) 8.

10(\frac{n}{2} + 6) = 8   Use the Distributive Property
5n + 60 = 8   Subtract 60 from both sides
5n = -52   Divide both sides by 5
n = -10 \frac{2}{5}
3 0
3 years ago
Mateo, a 31-year-old nonsmoker ($5.50), wants to purchase $100,000 in coverage for himself and $75,000 for his spouse, who is fe
igomit [66]

Answer: B. $32.50

Step-by-step explanation:

The premiums listed in brackets are for every $25,000 of coverage.

Mateo wants a $100,000 coverage so we need to divide this by $25,000 to see how much more he will have to pay:

= 100,000 / 25,000

= 4

Mateo will have to pay 4 times the $5.50 for himself:

= 4 * 5.50

= $22.00

For his spouse who requires $75,000, he will have to pay:

= 75,000 / 25,000

= 3

= 3 * 3.50

= $10.50

Total Mateo is to pay for both his spouse and himself is:

= 22 + 10.5

= $32.50

4 0
2 years ago
A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and
Dominik [7]

Answer:

Following are the solution to the given question:

Step-by-step explanation:

95\% Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

= \frac{228}{275}\\\\ = 0.829

\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})

                         = 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045

Lower 95\% Confidence interval = p - error margin = 0.829 - 0.045 = 0.784

Upper 95\% Confidence Interval = p + error margin= 0.829 + 0.045 = 0.874

So, 95\% Confidence Interval = ( 0.78 , 0.87 )

4 0
2 years ago
Factorise: x^2/y^2+1+y^2/X^2​
rewona [7]

Answer:

<h2>( \frac{x}{y}  +  \frac{y}{x}  + 1)( \frac{x}{y}  +  \frac{y}{x}  - 1)</h2>

Step-by-step explanation:

Hope it is helpful.....

7 0
2 years ago
Help meeeeeeeeeeeeeeeee
Inga [223]

Answer:

27

Step-by-step explanation:

The width of the frame is 9. If Marcia needs it to be THREE times as long as it is wide, that would mean she would have to multiply 3 x 9 which equals 27

7 0
3 years ago
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