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Serga [27]
3 years ago
10

What is the geometric proof of the figure above?

Mathematics
1 answer:
ryzh [129]3 years ago
3 0
AD bisect < BAC  ⇒< 1= <2
                            but < 1= <3    ⇒ < 2= <3
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Solve for y Y/3 + 25 = 31
ruslelena [56]

Answer:

y = 18

Step-by-step explanation:

8 0
2 years ago
What are the zeros of f(x) = x2 + x - 20?
jeyben [28]

Answer:

x = - 5, x = 4

Step-by-step explanation:

Given

f(x) = x² + x - 20

To find the zeros equate f(x) to zero, that is

x² + x - 20 = 0

Consider the factors of the constant term ( - 20) which sum to give the coefficient of the x- term ( + 1)

The factors are + 5 and - 4, since

5 × - 4 = - 20 and + 5 - 4 = + 1, hence

(x + 5)x - 4) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x - 4 = 0 ⇒ x = 4

8 0
3 years ago
Read 2 more answers
Determine whether or not 630 is a triangular number. start with the formula t n = n ( n + 1 ) 2 and then use the quadratic formu
ziro4ka [17]
Triangular sequence = n(n + 1)/2

If 630 is a triangular number, then:

n(n + 1)/2  = 630

Then n should be a positive whole number if 630 is a triangular number.

n(n + 1)/2  = 630

n(n + 1)  = 2*630

n(n + 1)  = 1260

n² + n = 1260

n² + n - 1260 = 0

By trial an error note that 1260 = 35 * 36

n² + n - 1260 = 0

Replace n with 36n - 35n

n² + 36n - 35n - 1260 = 0

n(n + 36) - 35(n + 36) = 0

(n + 36)(n - 35) = 0

n + 36 = 0   or   n - 35 = 0

n = 0 - 36,   or  n = 0 + 35

n = -36, or 35

n can not be negative. 

n = 35 is valid.

Since n is a positive whole number, that means 630 is a triangular number.

So the answer is True.
7 0
3 years ago
Recall that the volume of a rectangular solid (a box) is given by V=L-W-H. If a particular rectangular solid has a height of 2.
Jlenok [28]

Answer:

nb bhvghvghvhjhkj

Step-by-step explanation:

bjnbhv hgv

3 0
3 years ago
Which expression is equivalent to one over 3p + 15?
Dafna1 [17]
<span>3p + 15 = 3(p + 5) (distributive property)

answer
</span><span>3(p + 5)</span>
6 0
3 years ago
Read 2 more answers
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