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3 years ago

Prove that x=2 if 4^x=8x...where ^ stands for "to the power of".

1 answer:

4 0

In order to prove this, you simply plug in the number 2 everywhere you see X:

4^(2) = 8(2).

Simplify

16 = 16 √

Since this checks out, x is proven to be 2.

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Which of the following statements are true about the equation below?

solniwko [45]

The graph has a maximum value

3 0

3 years ago

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The following steps are used to rewrite the polynomial expression, 3(x + 4y) + 5(2x - y).

ololo11 [35]

Answer:

step1 - distributive property

step2 - associative property

step3 - cumulative property

step4 - associative property

Step-by-step explanation:

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2 years ago

95. A 20-gallon alcohol-water solution contains 15% pure alcohol. How much alcohol should

navik [9.2K]

Answer:

1.25 gallons of alcohol

Step-by-step explanation:

Let x represent the amount of alcohol to add to the mix. Then the total amount of alcohol in the mix is ...

0.15×20 + x = 0.20×(20 +x)

3 +x = 4 + 0.2x . . . . simplify

0.8x = 1 . . . . . . . . . . add -3-0.2x

x = 1/0.8 = 1.25 . . . . divide by 0.8

1.25 gallons of alcohol should be added to make 21.25 gallons of 20% alcohol.

4 0

3 years ago

What is -6+3/4 and how did you get your answer

sashaice [31]

Answer:

-0.75

Step-by-step explanation:

-6 + 3 = -3

-3/4 = -0.75

4 0

3 years ago

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The sum of the digits of a two-digit

Ann [662]

Answer:

Step-by-step explanation:

Let the unit place be ‘x'

Tenth place be y

The number is 10y+x

x+y = 9 (according to the condition) (1)

Digits are interchanged Unit place' y ‘& tenth place ‘ x'

New no is 10x +y

This is 9 more than the original number

10x+ y = 10y+x +9

10x-x+y-10y = 9

9x-9y= 9

x-y = 1 (dividing by 9) (2)

Adding the two equations

2x = 10

x= 5

Substituting the value of x in first equation

y = 4

The number is 45, the original number is 54 this is 9 more of the new number.

6 0

3 years ago