2 years ago

Pleaseeeeeeeeeeeeee i need the answer

Mathematics

1 answer:

olchik [2.2K]2 years ago

5 0

Answer:

x=−18,3

Step-by-step explanation:

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A scale on a map shows that 2.5 centimeters represent 15 kilometers.

MrRissso [65]

Answer:

cm for centimeters, km for kilometers.

If 2.5cm → 15 km, then

17.5 cm → x km

x= (15km*17.5cm)/(2.5cm)=105 km

Step-by-step explanation:

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2 years ago

The law of sines states that if a triangle with sides a,b, and c, then the following is true.

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C, because that’s the way to prove the law of sines.

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Question 30

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3 years ago

Find the sumofthe geometrical progression of five terms, of which the first term is 7 and the multiplier is 7.Verify that the su

777dan777 [17]

Answer:

The sum of first five term of GP is 19607.

Step-by-step explanation:

We are given the following in the question:

A geometric progression with 7 as the first term and 7 as the common ration.

$a, ar, ar^2,...\\a = 7\\r = 7$

$7, 7^2, 7^3, 7^4...$

Sum of n terms in a geometric progression:

$S_n = \displaystyle\frac{a(r^n - 1)}{(r-1)}$

For sum of five terms, we put n= 5, a = 7, r = 7

$S_5 = \displaystyle\frac{7(7^5 - 1)}{(7-1)}\\\\S_5 = 19607$

The sum of first five term of GP is 19607.

Verification:

$2801\times 7 = 19607$

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3 years ago

Help me to solve problem pless

sergejj [24]

Answer:

5 x -3 +6

= 5 x 6 + -3

= 30 + -3

= 27

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2 years ago

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