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weqwewe [10]
3 years ago
5

If mBC= 24 ft, mAC = 2x+1, and the mBA=7x-4, what is the value of x?

Mathematics
2 answers:
Andreas93 [3]3 years ago
5 0

Answer:

x = 3

Step-by-step explanation:

BC = 24

AC = 2x + 1

BA = 7x - 4

Required

Find x

The given parameters shows that A is a point on BC;

So:

BC = BA + AC

Substitute values for BC, BA, AC

24 = 7x - 4 + 2x + 1

Collect Like Terms

24 + 4 - 1 = 7x + 2x

27 = 9x

Solve for x

x = 27/9

x = 3

Sergio [31]3 years ago
5 0

Answer:

x=3

Step-by-step explanation:

:)

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7 0
3 years ago
Question number 8. Prove that 3 + √5 is an irrational number.​
Marina86 [1]

Answer :

Let's assume the opposite of the statement i.e., 3 + √5 is a rational number.

\\  \sf \: 3 +  \sqrt{5}  =  \frac{a}{b}   \\  \\   \qquad \: \tiny \sf{(where \:  \: a \:  \: and \:  \: b \:  \: are \:  \: integers \:  \: and \:  \: b \:  \neq \: 0)} \\

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\\ \sf \:  \frac{p - 3b}{b}  \\  \\  \qquad \tiny \sf{ \: (is \:  \: a \:  \: rational \:  \: number \:) } \\

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because of the wrong assumption that 3 + √5 is a rational number.

\\

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3 years ago
PLEASE HELP ME WITH BOTH QUESTIONS<br> THANKS!!
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First one:

cos(A)=AC/AB=3/4.24

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Second one:

To solve this problem, we have to ASSUME AFE is a straight line, i.e. angle EFB is 90 degrees. (this is not explicitly given).

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6 0
3 years ago
Your mom suggested ten different choices for you to eat for lunch over the next week at school. How many different ways can you
Serggg [28]

Answer:

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Step-by-step explanation:

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According to this, the answer is that you have 252 different ways to choose your school lunch.

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