Area of this shape with 2cm and 2cm and 4cm and 7cm

Mathematics

1 answer:

Annette [7]3 years ago

6 0

18cm is the answer of this question

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64% of 25 students in the class have a phone. How many students have a phone?

Damm [24]

Answer: 16

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6 0

3 years ago

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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

Is the answer is c please help me and explain

Zolol [24]

Answer:

5/8.

Step-by-step explanation:

3/4 equals 6/8 and 6/8 minus 1/8 (being subtracted) is 1/8.

I did not use Siri

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3 years ago

HELP ASAP : Find the largest value of n such that 5x^2+nx+48 can be factored as the product of two linear factors with integer c