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MArishka [77]
3 years ago
5

Square root of 7x times the square root of 7 root x

Mathematics
1 answer:
djyliett [7]3 years ago
8 0
Square root x * square root x = square root of x^2 which is just absolute value of x which is just x.
Now you’re left with 7x square root 7

I hope this helps
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Brian can lay a slab of concrete in 6 hours, while Greg can do it in 4 hours. If Brian and Greg work together, how long will it
anastassius [24]

Answer:

2 2/5 hours

Step-by-step explanation:

In 6 hours Brian can lay 1 slab of concrete

dividing both side by 6

in 6/6 hours Brian can lay 1/6 slab of concrete

Thus, in 1 hour  Brian can lay 1/6 slab of concrete

In 4 hours Greg can lay 1 slab of concrete

dividing both side by 4

in 4/4 hours Greg can lay 1/4 slab of concrete

Thus, in 1 hour  Greg can lay 1/4 slab of concrete

Thus, total part of slab laid by both in 1 hour when they work together

1/6 + 1/4 = 4+6/(6*4) = 10/24 = 5/12

5/12 of slab of concrete is laid by both of them in 1 hour

time taken to lay 5/12 of slab = 1 hour

dividing both side by 5/12

time taken to  5/12/ 5/12 of slab = 1/5/12 hour = 12/5 hours

time taken to 1/1 of slab = 12/5 hours = 2 2/5 hours

Thus,

it takes 2 2/5 hours to lay the full slab of concrete when Brian and Greg work together,

5 0
3 years ago
A rectangle is 2.8 in wide and 3.9 in tall. If it is enlarged to a width of 22.4 in, then how tall will it be?
Greeley [361]

Answer:A

Step-by-step explanation:

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3 years ago
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Dan wants to collect data about the eating habits of his friends.
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A) What time of the day do my friends eat their biggest meal? 

<span>B) How many times each week do my friends eat out? </span>

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Rewrite this number in appropriate scientific notation of 4,770,000
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75-3×3x=?
I believe that would be the equation. 
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3 years ago
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