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3 years ago

The area of circle Z is 64ft?.

Mathematics

2 answers:

Dennis_Churaev [7]3 years ago

7 0

Answer:

r=8

Step-by-step explanation:

Using the formula they gave us you could plug in the area (64) and divide it by pi which cancels out the pi so taking the square root of 64 gives you 8FT

Hope this helps :)

Nata [24]3 years ago

7 0

Answer:

8 ft

Step-by-step explanation:

$\because \: r = \sqrt{ \frac{Area}{\pi} } \\ \\ \therefore \: r = \sqrt{ \frac{64\pi}{\pi} } \\ \\ \therefore \:r = \sqrt{64} \\ \\ \therefore r = 8 \: ft$

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Select the correct answer. Solve the equation using the method of completing the square. 2r2 + 16r - 8 = 0

adoni [48]

Answer:

r=-4+2 $\sqrt{5}$ , r=-4-2 $\sqrt{5}$

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3 years ago

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Select all pairs of numbers that have a least common multiple of 30.

ddd [48]

5 and 6 and 3 and 10, the pairs of numbers that have a least common multiple of 30.

<u>Step-by-step explanation:</u>

Case 1: LCM (3, 6)

Prime factorization of 3: $1 \times 3$

Prime factorization of 6: $2 \times 3$

Using all prime numbers found as often as each occurs most often we take

$2 \times 3=6$

Therefore LCM (3, 6) = 6.

Case 2: LCM (5, 6)

Prime factorization of 5: $1 \times 5$

Prime factorization of 6: $2 \times 3$

Using all prime numbers found as often as each occurs most often we take

$5 \times 2 \times 3=30$

Therefore LCM (5, 6) = 30

Case 3: LCM (3, 10)

Prime factorization of 3: $1 \times 3$

Prime factorization of 10: $2 \times 5$

Using all prime numbers found as often as each occurs most often we take

$5 \times 2 \times 3=30$

Therefore LCM (3, 10) = 30

Case 4: LCM (5, 10)

Prime factorization of 5: $1 \times 5$

Prime factorization of 10: $2 \times 5$

Using all prime numbers found as often as each occurs most often we take

$5 \times 2=10$

Therefore LCM (5, 10) = 10

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3 years ago

Evaluate the expression for the given value of the variable |-4b-8|+|-1-b^3|+2b^3;b=-2

Serga [27]

[-4(-2)-8]+[-1-(-2)^3]+2(-2)^3

(8-8)+(-1+8)-64

7-64

57

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3 years ago

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90 minus 10x<br><br> ill give 25 points and brainiest

cricket20 [7]

Answer:

80x

Step-by-step explanation:

There is no substitution for the variable so the expression is 80x

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3 years ago

Ling worked three more hours on Tuesday than she did on Monday. On Wednesday, she worked one hour more than twice the number of

Nina [5.8K]

Let x be the number of hours ling work on monday.

We know that she worked three more hours on tuesday that in monday, this can be express as :

$x+3$

We also know that in wednesday she worked on more hour than twice the number on mondays, this can be expressed as:

$2x+1$

The total number of hours she worked this three days in two more than five the number of hours she worked on monday, this can be express as :

$5x+2\\$

Now , once we have all the expressions we add the expressions of the days and equate them to the total

$x+(x+3)+(2x+1)=5x+2$

Now we solve the equation

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Therefore , she worked 2 hours on monday.

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3 years ago

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