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ivann1987 [24]
3 years ago
7

I need help evaluating this problem

Mathematics
2 answers:
murzikaleks [220]3 years ago
8 0
Your answer should be 16/9
Reil [10]3 years ago
3 0
\bf \left( \cfrac{64}{27} \right)^{\frac{2}{3}}\implies \left( \cfrac{4^3}{3^3} \right)^{\frac{2}{3}}\implies \left( \cfrac{4^{3\cdot \frac{2}{3}}}{3^{3\cdot \frac{2}{3}}} \right)\implies \cfrac{4^2}{3^2}\implies \cfrac{16}{9}
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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
Identify 21, 46, and 57 as prime or composite.<br> HELP!!
vlada-n [284]

Answer:

Composite, Composite, composite

Step-by-step explanation:

all of them can be divided

4 0
3 years ago
Jordan writes 3(4x – 8) = 12x – 8
Ivahew [28]
Hi! What’s -8 times 3?
8 0
2 years ago
What is 12.5% of 10 kg in grams​
Anastasy [175]

Answer:

1250 g

Step-by-step explanation:

12.5% of 10 kg

12.5% of 10000 g

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1250 g

6 0
3 years ago
Read 2 more answers
Please help me with this question
yanalaym [24]
The answer is D because the slope formula shows that the answer is C or D and C would not make sense because the y intercept is impossible
6 0
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