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kkurt [141]
2 years ago
5

I need to find the value of x

Mathematics
2 answers:
Olenka [21]2 years ago
5 0

Answer: the answer is the square root of 21.

Step-by-step explanation:

What I did was I just multiplied 7 times 3 and got 21 and that was the answer.

tangare [24]2 years ago
3 0

Answer:

x = \sqrt{21}

Step-by-step explanation:

AC² = AB² + BC²

BC² = 3² + x² = 9 + x²

AB² = 7² + x² = 49 + x²

But AC² = (7 + 3)² = 100

∴ 100 = 49 + x² + 9 + x²

2x² + 58 = 100

x² = 50 - 29 = 21

x = \sqrt{21}

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A phone company offers two monthly plans. Plan A costs $11 plus an additional $0.16 for each minute of calls. Plan B costs $29 p
Andrew [12]

Answer:

The plans will cost the same when the amount you have to pay for talking for "x" minutes on Plan A is the same has what you have to pay for talking for the same number of "x" minutes when using Plan B.

 

$$ Plan A = $$ Plan B

 

To find the charge on each plan we add the base rate to the per minute call rate for each.

 

Plan A = $27 + $0.11x

Plan B = $13 + $0.15x

 

Let's drop the $ sign for now and get rid of the decimal point by multiplying by 100.

 

2700 + 11x = 1300 + 15x

 

Subtracting 11x and 1300 from both sides:

 

4x = 1400

 

x = 350 min.

 

Using this result the plans both cost $65.50 for 350 min of talk time.

Step-by-step explanation:

boom   :)

5 0
3 years ago
Help plzzzzzzzzzzzzzzzz
Alex

Answer:

Last option.

Step-by-step explanation:

The consecutive exterior angle theorem states that the exterior angles are supplementary if two lines are cut by a transversal.

m∠1 + m∠7 = 180

m∠2 + m∠8 = 180

3 0
3 years ago
A cyclist travels 5.8 km in 30 minutes. <br> What is his average speed in km/h?
Mila [183]

Answer:

11.6km/hr

Step-by-step explanation:

You need to double 30 minutes to get an hour, so do the same with the distance.

5.8*2=11.6 km

11.6km/hr

6 0
2 years ago
I need help pplzzzzzzzzzzzzzzz
Ratling [72]
2160

Explanation:
Use the equation (n-2)180
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2160
6 0
2 years ago
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Which expression is equivalent to 2(4 + x) + 3 ?
Elden [556K]
The correct answer is A. 2*4+x+3
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2 years ago
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