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Colt1911 [192]
3 years ago
12

Shaila bought 30 t-shirts at a clothing store. 20% of the t-shirts were blue and ½ of the shirts were black. How many of the t-s

hirts were NEITHER black nor blue
Mathematics
1 answer:
abruzzese [7]3 years ago
4 0

Answer:

9 shirts

Step-by-step explanation:

20% of the shirts were blue

20% of 30 is 6

6 shirts were blue

1/2 of the shirts were black

1/2 = 50%

50% of 30 is 15

15 shirts are black

15 + 6 = 21

30 - 21 = 9

(or you could add the percentages to get 70%, and get 30%. 30% of 30 is 9.)

Hope this helps!

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12²+ 9 - 4<br> a) 119<br> b)147<br> c)137<br> d)221
ziro4ka [17]

Answer:

it will be 147

Step-by-step explanation:

12x12=144

5 0
3 years ago
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He difference of two numbers is 50. twice one number equals three times the other. find the numbers.
Juli2301 [7.4K]
X-y=50 and 2x=3y 
x=y+50 so 2(y+50) = 3y 

2y+100=3y
y=100

x-100=50
x=150

so our numbers are 150 and 100 

150-100=50 and 150 is 3*50 and 100 is 2*50 so fits all requirements!

hope this helps you! thank you!
6 0
3 years ago
Jane has 5 books.fred has 2 more books than jane.how many books do fred and jane have in all​
jolli1 [7]

Step-by-step explanation:

5+7=12 books all together

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3 years ago
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Find the slope using points ( 7,-3) and (11,-4)
Marina CMI [18]

Answer:

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Step-by-step explanation:

5 0
2 years ago
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Find the equation of the sphere passing through P(negative 4 comma 7 comma 6 )and Q(8 comma negative 3 comma 5 )with its center
Juli2301 [7.4K]

Answer: The equation of the sphere is:

(x-2)^2 + (y-2)^2 + (z-5/2)^2 = sqrt(245)/2

Step-by-step explanation:

The centre of the sphere is the midpoint of the diameter, which is

1/2

[(-4,7,6) + (8,-3,5)] =(2,2,5/2)

The length of the diameter is

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=sqrt (144+100+1)

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so the radius of

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1/2(sqrt(245)) = sqrt(245)/2.

The equation of the sphere is:

(x-2)^2 + (y-2)^2 + (z-5/2)^2 = sqrt(245)/2

4 0
3 years ago
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