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evablogger [386]

3 years ago

8

A two digit number is five times its units digit . If the digits are versed , the resulting numbered is 27 more than the origina

l number. Find the original number

1 answer:

True [87]3 years ago

4 0

52 should be the awnser

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Find the seventh term of the geometric sequence 1, 2, 4, ... and the sum of the first seven terms. t7= S7=

IrinaK [193]

Answer:

Seventh term is 64

Sum of the first seven terms is 127

Step-by-step explanation:

The common ratio is 2

$a_{n} = a_{1} r^{n - 1}$

n = 7 and the first term is 1. So,

$a_{7} = 1(2^{7 - 1} ) = 2^{6} = 64$

Seventh term is 64

$S_{n} = \frac{a_{1} (r^{n} -1)}{r - 1}$

$S_{7} = \frac{1(2^{7} -1)}{2 - 1}$

$= \frac{128 - 1}{1} = 127$

Sum of the first seven terms is 127

8 0

3 years ago

What is 0.025 in word form?

Kobotan [32]

Twenty-five thousandths.

4 0

3 years ago

Read 2 more answers

3*3*3*3= 81 is an example of ___

mash [69]

Answer:

expanded I believe or the first one good luck

7 0

3 years ago

Read 2 more answers

If V1 = (2,4) and V2 = (-1,5), then V1*V2is equal to which of the following? A. (-2,20) , B. 18 , C. 22 , D. (8,-5)

neonofarm [45]

B. 18

Explanation

The dot product or scalar product is an algebraic operation that takes two equal-length sequences of numbers (usually coordinate vectors), and returns a single number

it is given by.

$\begin{gathered} u=(u_x,u_y) \\ v=(v_{_x},v_y) \\ u\cdot v=(u_xv_x+u_yv_y) \end{gathered}$

so, we can find the dot product by multiplying the corresponding values in each vector and adding them together

Step 1

get the dot product

let

$\begin{gathered} v_1=(2,4) \\ v_2=(-1,5) \end{gathered}$

then

$\begin{gathered} v_1\cdot v_2=(2\cdot-1)+(4\cdot5) \\ v_1\cdot v_2=-2+20 \\ v_1\cdot v_2=18 \end{gathered}$

therefore, the answer is

B. 18

I hope this helps you

7 0

1 year ago

There are 10 less trumpets players then saxophone players. The number of saxophone players is 3 times the number of trumpet play

rjkz [21]

Let the number of saxophone players be $s$ .

Then, the number of trumpet players will be $s-10$

If saxophone players are three times the number of trumpet players then we have the relation

$s=3(s-10)$

This is a linear equation in s. we expand bracket to obtain,

$s=3s-30$

We group like terms to get,

$s-3s=-30$

$-2s=-30$

This implies that

$s=15$

The number of trumpet players are;

$15-10=5$

Therefore there are 5 trumpet players.

3 0

3 years ago