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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
Mathematics
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
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