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3 years ago

Solve this equation. 2/3x−1/5x=x−1

Mathematics

2 answers:

sergejj [24]3 years ago

7 0

Answer:

1,875

Step-by-step explanation:

$\frac{2}{3}x-\frac{1}{5}x=x-1\\\\=> \frac{2.5}{15}x-\frac{3}{15}x=x-1 \\\\=> \frac{2.5-3}{15}x=x-1\\\\=> \frac{10-3}{15}x=x-1\\\\\frac{7}{15}x=x-1\\\\=> 7 x=15(x-1)\\\\ 7x=15x-15\\\\ 8x=15\\\\ x =\frac{15}{8}=1,875$

KonstantinChe [14]3 years ago

6 0

Answer:

= 1 7/8

Step-by-step explanation:

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Anna007 [38]

The answer to your math question is 66°.
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3 years ago

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In ΔQRS, the measure of ∠S=90°, QR = 8.2 feet, and SQ = 4.2 feet. Find the measure of ∠R to the nearest degree.

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4 years ago

If ORBIT is coded BEOVG, then how is PLANET coded? /

arlik [135]

Answer:

1. CYNARG

Step-by-step explanation:

This a example of Caesar's Cipher, in which each letter in the original word leads to a ciphered letter according to the following equation:

$C = (P + o) \text{mod} 26$

In which C is the index of the Ciphered letter in the alphabet, P is the index of the original letter and o is the offset.

Finding the offset:

O is coded B

O is the 15th letter in the alphabet, so $P = 15$ .

B is the 2nd letter in the alphabet, so $C = 2$

$C = (P + o) \text{mod} 26$

$2 = (15 + o) \text{mod} 26$

$|o = |2-15| \text{mod} 26$

$o = 13$

$C = (P + 13) \text{mod} 26$

PLANET:

P is the 16th letter in the alphabet.

$C = (16 + 13) \text{mod} 26 = 3$

So P is coded C.

L is the 12th letter in the alphabet:

$C = (12 + 13) \text{mod} 26 = 25$

L is coded Y(25th letter in the alphabet)

A is the 1st letter in the alphabet

$C = (1 + 13) \text{mod} 26 = 14$

A is coded N

N is the 14th letter in the alphabet

$C = (14 + 13) \text{mod} 26 = 1$

N is coded A

E is the 5th letter in the alphabet

$C = (5 + 13) \text{mod} 26 = 18$

E is coded R

So the correct answer is:

1. CYNARG

4 0

3 years ago

There are several sets of different numbers which can be chosen from {0,1,2,3,4,5,6,7,8,9}. How many of these sets contain any 2

Leokris [45]

Answer:

Step-by-step explanation:

it is 90 because in the first slot there can be any 10 numbers and in the second slot the set can contain any of the remaining 9 numbers and then we can multiply these two numbers together to find the total amount of sets.

hope this helps :)

4 0

3 years ago

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