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3 years ago

David compro 23 boligrafos y 15 lapizes, cada boligrafo le costo 14 pesos y cada lapiz 9. ¿Cuanto gasto en total David?

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

4 0

Answer:

457 pesos

Step-by-step explanation:

From the above question, we are told that:

David bought 23 pens and 15 pencils.

Each pen = 14 pesos

Each pencil = 9 pesos

The amount of money David spent in total =

(23 × 14 pesos) + (15 × 9 pesos)

= 322 pesos + 135 pesos

= 457 pesos

Therefore, David spent in total 457 pesos

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(9⋅10

cestrela7 [59]

Answer:

A. -18·10^6

Step-by-step explanation:

The rules of exponents apply to powers of 10 used in scientific notation. The associative and commutative properties of multiplication also apply.

<h3>Application</h3>

(a^b)(a^c) = a^(b+c)

The numerical product is ...

$(9\cdot10^9)\cdot(-2\cdot10^{-3})=(9)(-2)(10^{9-3})=\boxed{-18\cdot10^6}$

<em>Additional comment</em>

Expressed in scientific notation, the result would be ...

$-1.8\cdot10^7$

Your calculator can perform this multiplication for you.

8 0

2 years ago

Sum of series 1 +1/3 +1/3².... is?

Charra [1.4K]

Answer:

The sum of the series is 3/2

Step-by-step explanation:

Given

1 + 1/3 + 1/3^2 + ....

Required

The sum of the series

This implies that we calculate the sum to infinity.

We have:

$a = 1$ -- The first term

First, calculate the common ratio (r)

$r = \frac{1}{3^2} / \frac{1}{3}$

Change to product

$r = \frac{1}{3^2} * \frac{3}{1}$

Solve

$r = \frac{1}{3}$

The sum of the series is then calculated as:

$S_{\infty} = \frac{a}{1 - r}$

$S_{\infty} = \frac{1}{1 - 1/3}$

Solve the denominator

$S_{\infty} = \frac{1}{2/3}$

Express as product

$S_{\infty} = 1 * \frac{3}{2}$

$S_{\infty} = \frac{3}{2}$

7 0

3 years ago

What is the answer for 66 tens-39 tens =

g100num [7]

The awnser is 27
hope that helps

8 0

3 years ago

Read 2 more answers

Can u please answer?

lorasvet [3.4K]

Answer:

35 cm²

Step-by-step explanation:

A=bl

A=5(7) so

35 cm²

5 0

3 years ago

Could you please help me with finding the circumference? An explanation to go with it would be great!

Naddik [55]

Step-by-step explanation:

37,7m, π*(r*2)

r*2 is diameter it's kinda ez , just put 37,7m and ur done

4 0

3 years ago