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crimeas [40]
4 years ago
10

0.4(x+0.7)=0.6x-4.2 Solve for x

Mathematics
2 answers:
Natali [406]4 years ago
8 0
0.4x + 0.28 = 0.6x - 4.2
0.4 x - 0.6x = - 4.2 - 0.28
- 0.2x = -4.48
<span>x = 22.4</span>
ira [324]4 years ago
7 0
0.4x + 0.28 = 0.6x - 4.2
0.4 x - 0.6x = - 4.2 - 0.28
- 0.2x = -4.48
x = 22.4
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Frank reasoned that in the number 0.555, the value of the 5 in the thousands place is ten times as great as the 5 in the hundred
Gnom [1K]

The given number is 0.555 which can be written as

0+ \frac{1}{10}*5 + \frac{1}{100}* 5+ \frac{1}{1000} * 5

As we see that after decimal, every next digit is 1/10 times of the current digit .

Therefore the statement , " the value of the 5 in the thousands place is ten times as great as the 5 in the hundredth place " is not correct .


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The difference of a number and 6 is the same as 5 times the sum of the number and 2. What is the number?
S_A_V [24]

Step-by-step explanation:

Lets consider the unknown number as x

according to the question,

6-x= 5(x+2)

6-x= 5x+10

-x-5x=10-6

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x=4/-6= 2/-3

x= -2/3

<em>hope this helps </em>

<em>please mark me as brainliest.</em>

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3 years ago
What is the mean, medium, mode of 54,220
irina [24]

Answer:

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Median: 15.5

Mode: 13

Range: 16

Minimum: 9

Maximum: 25

Count n: 16

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Step-by-step explanation:

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7 0
3 years ago
Who can finish this for me
Paladinen [302]

Answer:

<h2>-  {x}^{4}  - 7 {x}^{3}  + 8</h2>

Step-by-step explanation:

(5 - 5 {x}^{4}  -  {x}^{3} ) - (6 {x}^{3}  - 4 {x}^{4}  - 3)

Remove unnecessary parentheses

5 - 5 {x}^{4}  -  {x}^{3}  - (6 {x}^{3}  - 4 {x}^{4}  - 3)

When there is a (-) in front of an expression in parentheses, change the sign of each term in the expression

5 - 5 {x}^{4}  -  {x}^{3}  - 6 {x}^{3}  + 4 {x}^{4}  + 3

Collect like terms

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5 + 3 -  {x}^{4}  - 7 {x}^{3}

Add the numbers

8 -  {x}^{4}  - 7 {x}^{3}

Use the commutative property to reorder the terms

-  {x}^{4}  - 7 {x}^{3}  + 8

Hope this helps...

Best regards!!

8 0
4 years ago
What is the value of x?
Artyom0805 [142]

Answer:

X. The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!

Step-by-step explanation:

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